From b61e212878fa33c4b3d2c1b7fbe0b721f8667fdf Mon Sep 17 00:00:00 2001 From: Cyrill Troxler Date: Sat, 11 Jul 2026 13:50:40 +0200 Subject: [PATCH 01/17] feat: reuseport activator This adds a completely new activator that makes use of bpf_sk_select_reuseport to steer wake/probe traffic instead of a userspace proxy+port rewrites. With this, zeropod is completely out of the data path for normal app traffic. --- activator/activator.go | 6 +- activator/reuse/activator.go | 657 +++++++++++++++++++++++++++++ activator/reuse/reuseport.c | 39 ++ activator/reuse/reuseport_bpfeb.go | 133 ++++++ activator/reuse/reuseport_bpfeb.o | Bin 0 -> 3224 bytes activator/reuse/reuseport_bpfel.go | 133 ++++++ activator/reuse/reuseport_bpfel.o | Bin 0 -> 3224 bytes activator/reuse/sockopt.c | 31 ++ activator/reuse/sockopt_bpfeb.go | 129 ++++++ activator/reuse/sockopt_bpfeb.o | Bin 0 -> 2176 bytes activator/reuse/sockopt_bpfel.go | 129 ++++++ activator/reuse/sockopt_bpfel.o | Bin 0 -> 2176 bytes go.mod | 2 + shim/checkpoint.go | 5 +- shim/container.go | 44 +- shim/probe_test.go | 4 +- shim/restore.go | 10 +- 17 files changed, 1289 insertions(+), 33 deletions(-) create mode 100644 activator/reuse/activator.go create mode 100644 activator/reuse/reuseport.c create mode 100644 activator/reuse/reuseport_bpfeb.go create mode 100644 activator/reuse/reuseport_bpfeb.o create mode 100644 activator/reuse/reuseport_bpfel.go create mode 100644 activator/reuse/reuseport_bpfel.o create mode 100644 activator/reuse/sockopt.c create mode 100644 activator/reuse/sockopt_bpfeb.go create mode 100644 activator/reuse/sockopt_bpfeb.o create mode 100644 activator/reuse/sockopt_bpfel.go create mode 100644 activator/reuse/sockopt_bpfel.o diff --git a/activator/activator.go b/activator/activator.go index 4550e2a..453cf0e 100644 --- a/activator/activator.go +++ b/activator/activator.go @@ -50,7 +50,7 @@ type Server struct { } type ConnHook func(net.Conn) (conn net.Conn, cont bool, err error) -type RestoreHook func() error +type RestoreHook func() (int, error) type Option func(s *Server) @@ -179,7 +179,7 @@ func (s *Server) SetPeekBufferSize(size int) { func (s *Server) ForwardToTarget(addr string) { // disable hooks s.connHook = func(c net.Conn) (net.Conn, bool, error) { return c, true, nil } - s.restoreHook = func() error { return nil } + s.restoreHook = func() (int, error) { return 0, nil } s.targetAddr = addr s.forwardToTarget = true } @@ -295,7 +295,7 @@ func (s *Server) handleConnection(ctx context.Context, netConn net.Conn, port ui } }() - if err := s.restoreHook(); err != nil { + if _, err := s.restoreHook(); err != nil { log.G(ctx).Errorf("restoreHook: %s", err) return } diff --git a/activator/reuse/activator.go b/activator/reuse/activator.go new file mode 100644 index 0000000..2c61cbf --- /dev/null +++ b/activator/reuse/activator.go @@ -0,0 +1,657 @@ +package reuse + +import ( + "context" + "errors" + "fmt" + "net" + "os" + "path/filepath" + "slices" + "strconv" + "strings" + "sync" + "sync/atomic" + "syscall" + "time" + + "github.com/cilium/ebpf" + "github.com/cilium/ebpf/link" + "github.com/cilium/ebpf/rlimit" + "github.com/containerd/cgroups/v3/cgroup2" + "github.com/containerd/log" + "github.com/containernetworking/plugins/pkg/ns" + "github.com/ctrox/zeropod/activator" + "github.com/prometheus/procfs" + "golang.org/x/sys/unix" +) + +//go:generate go run github.com/cilium/ebpf/cmd/bpf2go -cc $BPF_CLANG -cflags $BPF_CFLAGS reuseport reuseport.c -- -I/headers +//go:generate go run github.com/cilium/ebpf/cmd/bpf2go -cc $BPF_CLANG -cflags $BPF_CFLAGS sockopt sockopt.c + +type network string + +const ( + networkTCP4 network = "tcp4" + networkTCP6 network = "tcp6" + networkTCP6ONLY network = "tcp" +) + +type wakeListener struct { + ln *net.TCPListener + lnFd *os.File + reuse *reuseportObjects +} + +type appListener struct { + fd int +} + +type listenerKey struct { + port uint16 + network network +} + +func (wl *wakeListener) closeListener() { + if wl.ln != nil { + _ = wl.ln.Close() + } + if wl.lnFd != nil { + _ = wl.lnFd.Close() + } +} + +func (wl *wakeListener) close() { + wl.closeListener() + if wl.reuse != nil { + _ = wl.reuse.Close() + } +} + +type Activator struct { + ports []uint16 + mu sync.Mutex + wakeListeners map[listenerKey]*wakeListener + appListeners map[listenerKey]*appListener + wakeInodes []uint64 + restoreHook activator.RestoreHook + log *log.Entry + ns ns.NetNS + started atomic.Bool + sockOptLink link.Link + cgroupsPath string + sandboxPid int +} + +const ( + appKey = 0 + wakeKey = 1 + probeKey = 2 +) + +func New(ctx context.Context, ns ns.NetNS, cgroupsPath string) (*Activator, error) { + act := &Activator{ + ns: ns, + cgroupsPath: cgroupsPath, + log: log.GetLogger(ctx), + sandboxPid: parsePidFromNetNS(ns), + wakeListeners: make(map[listenerKey]*wakeListener), + appListeners: make(map[listenerKey]*appListener), + } + if err := act.LoadBPF(); err != nil { + return nil, fmt.Errorf("loading ebpf: %w", err) + } + return act, nil +} + +func (act *Activator) LoadBPF() error { + if err := rlimit.RemoveMemlock(); err != nil { + return err + } + sockoptObjs := &sockoptObjects{} + if err := loadSockoptObjects(sockoptObjs, nil); err != nil { + return fmt.Errorf("loading sockopt objects: %w", err) + } + + path, err := cgroup2.PidGroupPath(act.sandboxPid) + if err != nil { + return err + } + // use filepath.Dir to get parent cgroup of the cri-container + hostCgroupPath := filepath.Join("/sys/fs/cgroup", filepath.Dir(path)) + act.log.Debugf("attaching setsockopt to cgroup %s", hostCgroupPath) + l, err := link.AttachCgroup(link.CgroupOptions{ + Path: hostCgroupPath, + Attach: ebpf.AttachCGroupSetsockopt, + Program: sockoptObjs.Setsockopt, + }) + if err != nil { + return err + } + act.sockOptLink = l + return nil +} + +func parsePidFromNetNS(nn ns.NetNS) int { + parts := strings.Split(nn.Path(), "/") + if len(parts) < 3 { + return 0 + } + + pid, err := strconv.Atoi(parts[2]) + if err != nil { + return 0 + } + + return pid +} + +func (act *Activator) Start(ctx context.Context, connHook activator.ConnHook, restoreHook activator.RestoreHook, pid int, ports ...uint16) error { + act.ports = ports + act.restoreHook = restoreHook + + before := time.Now() + if err := act.registerListeners(pid); err != nil { + act.log.WithError(err).Error("registering listeners") + return err + } + act.log.Infof("registered listeners in %s", time.Since(before)) + + act.started.Store(true) + return nil +} + +func (act *Activator) Started() bool { + return act.started.Load() +} + +func (act *Activator) Stop() error { + act.mu.Lock() + defer act.mu.Unlock() + for _, wl := range act.wakeListeners { + wl.close() + } + if act.sockOptLink != nil { + act.sockOptLink.Close() + } + return nil +} + +func (act *Activator) LastActivity(port uint16) (time.Time, error) { + // TODO: implement + return time.Time{}, nil +} + +var ErrListenersNotFound = errors.New("listeners not found") + +func (act *Activator) registerListeners(pid int) error { + act.mu.Lock() + defer act.mu.Unlock() + + before := time.Now() + listeners, err := act.listenerFds(pid, len(act.ports)) + if err != nil { + return err + } + if len(listeners) < len(act.ports) { + return fmt.Errorf("%w: expected at least %d listeners, found %d", ErrListenersNotFound, len(act.ports), len(listeners)) + } + act.log.Infof("getting listeners in %s", time.Since(before)) + + for _, l := range listeners { + if l.fd == nil { + continue + } + defer l.fd.Close() + act.log.Infof("registering ln %d port %d family %d ino %d", l.fd.Fd(), l.port, l.family, l.inode) + objs := &reuseportObjects{} + if err := loadReuseportObjects(objs, &ebpf.CollectionOptions{}); err != nil { + return fmt.Errorf("loading reuseport objects: %w", err) + } + if err := act.registerLn(l.fd, objs.Listeners, objs.SelectOrMigrate); err != nil { + return fmt.Errorf("registering listener: %w", err) + } + net := networkTCP4 + if l.family == unix.AF_INET6 { + net = networkTCP6ONLY + } + key := listenerKey{port: l.port, network: net} + if _, ok := act.wakeListeners[key]; !ok { + act.wakeListeners[key] = &wakeListener{reuse: objs} + } + act.log.Infof("caching port %d fd %d", l.port, l.origFd) + act.appListeners[key] = &appListener{fd: l.origFd} + } + if len(listeners) == 0 { + return errNoListeningSockets + } + return nil +} + +func (act *Activator) wake(port uint16, network network) error { + if act.restoreHook != nil { + pid, err := act.restoreHook() + if err != nil { + act.log.WithError(err).Error("restore hook") + return err + } + before := time.Now() + if err := act.registerListeners(pid); err != nil { + act.log.WithError(err).Error("registering listeners") + return err + } + act.log.Infof("registered listeners in %s", time.Since(before)) + } + act.mu.Lock() + defer act.mu.Unlock() + for _, wl := range act.wakeListeners { + wl.closeListener() + } + // sk_reuseport/migrate only seems to migrate pending connections to the + // wake listener only when a new conn comes in. We call poke which just + // dials and immediately closes to trigger the migration. + for _, port := range act.ports { + if err := act.poke(port, network); err != nil { + act.log.WithError(err).Error("poke app listener") + } + } + return nil +} + +func (act *Activator) poke(port uint16, network network) error { + return act.ns.Do(func(nn ns.NetNS) error { + addr := fmt.Sprintf("127.0.0.1:%d", port) + if network == networkTCP6 || network == networkTCP6ONLY { + addr = fmt.Sprintf("[::1]:%d", port) + } + dialer := net.Dialer{Timeout: time.Second} + c, err := dialer.Dial(string(network), addr) + if err == nil { + return c.Close() + } + return err + }) +} + +func (act *Activator) ScaleDown() error { + act.mu.Lock() + defer act.mu.Unlock() + for _, wl := range act.wakeListeners { + wl.closeListener() + } + act.wakeInodes = []uint64{} + for k := range act.wakeListeners { + act.log.Infof("spawning wake listener: %v", k) + if err := act.listen(k.port, k.network, act.wakeListeners[k]); err != nil { + return err + } + } + act.log.Info("listening for new connections on wake listener") + act.log.Infof("wakeListeners: %d: %v", len(act.wakeListeners), act.wakeListeners) + return nil +} + +func (act *Activator) listen(port uint16, network network, wl *wakeListener) error { + if err := act.ns.Do(func(nn ns.NetNS) error { + ln, err := listenReuseport(port, network) + if err != nil { + return fmt.Errorf("wake listener: %w", err) + } + wl.ln = ln + return nil + }); err != nil { + return err + } + f, err := wl.ln.File() + if err != nil { + wl.ln.Close() + return err + } + wl.lnFd = f + var stat syscall.Stat_t + if err := syscall.Fstat(int(f.Fd()), &stat); err != nil { + return err + } + act.wakeInodes = append(act.wakeInodes, stat.Ino) + if err := unix.SetsockoptInt(int(wl.lnFd.Fd()), unix.SOL_SOCKET, + unix.SO_ATTACH_REUSEPORT_EBPF, wl.reuse.SelectOrMigrate.FD()); err != nil { + return fmt.Errorf("attach reuseport prog: %w", err) + } + key := uint32(wakeKey) + if err := wl.reuse.Listeners.Update(&key, uint64(wl.lnFd.Fd()), ebpf.UpdateAny); err != nil { + wl.lnFd.Close() + wl.ln.Close() + act.log.WithError(err).Error("inserting wake listener") + return fmt.Errorf("inserting wake listener: %w", err) + } + go act.watchWake(wl.lnFd, port, network) + return nil +} + +// watchWake polls the wake listener without ever accepting and calls wake as +// soon as the poll returns something. +func (act *Activator) watchWake(f *os.File, port uint16, network network) { + epfd, err := unix.EpollCreate1(unix.EPOLL_CLOEXEC) + if err != nil { + act.log.WithError(err).Error("epoll create") + return + } + defer func() { + _ = unix.EpollCtl(epfd, unix.EPOLL_CTL_DEL, int(f.Fd()), nil) + _ = unix.Close(epfd) + }() + event := unix.EpollEvent{ + Events: unix.EPOLLIN, + Fd: int32(f.Fd()), + } + if err := unix.EpollCtl(epfd, unix.EPOLL_CTL_ADD, int(f.Fd()), &event); err != nil { + act.log.WithError(err).Error("failed to register socket with epoll") + return + } + events := make([]unix.EpollEvent, 10) + for { + n, err := unix.EpollWait(epfd, events, -1) + if err != nil { + if err == unix.EINTR { + continue + } + act.log.WithError(err).Error("epoll wait failed") + } + + for i := range n { + if int(events[i].Fd) != int(f.Fd()) { + continue + } + act.log.Info("socket activity detected, waking up") + if err := act.wake(port, network); err != nil { + act.log.WithError(err).Error("wake") + } + + return + } + } +} + +// registerLn attaches select_or_migrate to the listerners reuseport group and +// puts it into slot 0. The caller closes its dup of the fd afterwards and the +// sockarray holds the socket via the listeners own fd. +func (act *Activator) registerLn(lnFd *os.File, bpfMap *ebpf.Map, prog *ebpf.Program) error { + if err := unix.SetsockoptInt(int(lnFd.Fd()), unix.SOL_SOCKET, + unix.SO_ATTACH_REUSEPORT_EBPF, prog.FD()); err != nil { + return fmt.Errorf("attach reuseport prog: %w", err) + } + key := uint32(appKey) + if err := bpfMap.Update(&key, uint64(lnFd.Fd()), ebpf.UpdateAny); err != nil { + return fmt.Errorf("sockarray app: %w", err) + } + return nil +} + +// listenReuseport opens a TCP listener with SO_REUSEPORT +func listenReuseport(port uint16, network network) (*net.TCPListener, error) { + lc := net.ListenConfig{ + Control: func(_, _ string, c syscall.RawConn) error { + var serr error + if err := c.Control(func(fd uintptr) { + serr = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1) + if serr != nil { + return + } + if network == networkTCP6ONLY { + serr = unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_V6ONLY, 0) + } + }); err != nil { + return err + } + return serr + }, + } + lc.SetMultipathTCP(false) + n := string(network) + if network == networkTCP6ONLY { + n = string(networkTCP6) + } + ln, err := lc.Listen(context.Background(), n, fmt.Sprintf(":%d", port)) + if err != nil { + return nil, err + } + return ln.(*net.TCPListener), nil +} + +type listener struct { + port uint16 + family uint8 + inode uint32 + origFd int + fd *os.File +} + +var errNoListeningSockets = errors.New("no listening sockets found") + +func (act *Activator) listenerFdsFromCache(pid int) ([]listener, error) { + cache := act.appListeners + if len(cache) == 0 { + return nil, nil + } + + listeners := []listener{} + pids, err := containerPids(pid) + if err != nil { + return nil, err + } + for _, cpid := range pids { + // bail out early as we found all listeners + if len(listeners) == len(cache) { + break + } + + pidfd, err := unix.PidfdOpen(cpid, 0) + if err != nil { + continue + } + defer unix.Close(pidfd) + + for k, v := range cache { + fd, err := unix.PidfdGetfd(pidfd, v.fd, 0) + if err != nil { + continue + } + var stat unix.Stat_t + if err := unix.Fstat(int(fd), &stat); err != nil { + return nil, err + } + + sockaddr, err := unix.Getsockname(fd) + if err != nil { + continue + } + + var port int + switch sa := sockaddr.(type) { + case *unix.SockaddrInet4: + port = sa.Port + case *unix.SockaddrInet6: + port = sa.Port + } + if k.port != uint16(port) { + continue + } + + family := uint8(unix.AF_INET) + if k.network == networkTCP6 || k.network == networkTCP6ONLY { + family = unix.AF_INET6 + } + listeners = append(listeners, listener{ + port: k.port, + family: family, + fd: os.NewFile(uintptr(fd), ""), + origFd: v.fd, + inode: uint32(stat.Ino), + }) + } + } + return listeners, nil +} + +func containerPids(pid int) ([]int, error) { + rootProc, err := procfs.NewProc(pid) + if err != nil { + return nil, err + } + rootNs, err := rootProc.Namespaces() + if err != nil { + return nil, err + } + pidNSInode := rootNs["pid"].Inode + + pfs, err := procfs.NewDefaultFS() + if err != nil { + return nil, err + } + procs, err := pfs.AllProcs() + if err != nil { + return nil, err + } + + containerProcs := []int{} + for _, proc := range procs { + target, err := os.Readlink(filepath.Join(procfs.DefaultMountPoint, strconv.Itoa(proc.PID), "ns", "pid")) + if err != nil { + continue + } + + fields := strings.SplitN(target, ":", 2) + if len(fields) != 2 { + continue + } + + inode, err := strconv.ParseUint(strings.Trim(fields[1], "[]"), 10, 32) + if err != nil { + continue + } + + if uint32(inode) != pidNSInode { + continue + } + containerProcs = append(containerProcs, proc.PID) + } + return containerProcs, nil +} + +func (act *Activator) listenerFds(pid int, minListeners int) ([]listener, error) { + l, err := act.listenerFdsFromCache(pid) + if err == nil && len(l) >= minListeners { + return l, nil + } + listeners, err := act.getListeningInodes(pid) + if err != nil { + return nil, err + } + + pids, err := containerPids(pid) + if err != nil { + return nil, err + } + + listenersWithFd := []listener{} + inos := map[uint32]struct{}{} + for _, cpid := range pids { + for _, listener := range listeners { + if _, ok := inos[listener.inode]; ok { + continue + } + if slices.Contains(act.wakeInodes, uint64(listener.inode)) { + continue + } + target, err := socketFdNum(cpid, []uint32{listener.inode}) + if err != nil { + continue + } + pidfd, err := unix.PidfdOpen(cpid, 0) + if err != nil { + continue + } + defer unix.Close(pidfd) + + fd, err := unix.PidfdGetfd(pidfd, target, 0) + if err != nil { + continue + } + listener.fd = os.NewFile(uintptr(fd), "") + listener.origFd = target + listenersWithFd = append(listenersWithFd, listener) + inos[listener.inode] = struct{}{} + } + } + return listenersWithFd, nil +} + +func (act *Activator) getListeningInodes(pid int) ([]listener, error) { + fs, err := procfs.NewFS("/proc/" + strconv.Itoa(pid)) + if err != nil { + return nil, err + } + + netTCP4, err := fs.NetTCP() + if err != nil { + return nil, err + } + netTCP6, err := fs.NetTCP6() + if err != nil { + return nil, err + } + + listeners := []listener{} + const TCP_LISTEN = 10 + for _, sock := range netTCP4 { + if sock.St == TCP_LISTEN { + if slices.Contains(act.wakeInodes, uint64(sock.Inode)) { + continue + } + listeners = append(listeners, listener{ + port: uint16(sock.LocalPort), + family: unix.AF_INET, + inode: uint32(sock.Inode), + }) + } + } + for _, sock := range netTCP6 { + if sock.St == TCP_LISTEN { + if slices.Contains(act.wakeInodes, uint64(sock.Inode)) { + continue + } + listeners = append(listeners, listener{ + port: uint16(sock.LocalPort), + family: unix.AF_INET6, + inode: uint32(sock.Inode), + }) + } + } + + if len(listeners) == 0 { + return nil, errNoListeningSockets + } + return listeners, nil +} + +// socketFdNum scans /proc//fd for the fd number backing any of the +// socket inodes. +func socketFdNum(pid int, inodes []uint32) (int, error) { + dir := fmt.Sprintf("/proc/%d/fd", pid) + ents, err := os.ReadDir(dir) + if err != nil { + return 0, err + } + want := make(map[string]bool, len(inodes)) + for _, ino := range inodes { + want[fmt.Sprintf("socket:[%d]", ino)] = true + } + for _, e := range ents { + link, err := os.Readlink(filepath.Join(dir, e.Name())) + if err != nil || !want[link] { + continue + } + return strconv.Atoi(e.Name()) + } + return 0, fmt.Errorf("no fd for socket inodes %v", inodes) +} diff --git a/activator/reuse/reuseport.c b/activator/reuse/reuseport.c new file mode 100644 index 0000000..0cadd61 --- /dev/null +++ b/activator/reuse/reuseport.c @@ -0,0 +1,39 @@ +//go:build ignore +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include "bpf_endian.h" + +char __license[] SEC("license") = "Dual MIT/GPL"; + +// key 0: app listener +// key 1: wake listener +// key 2: probe listener +struct { + __uint(type, BPF_MAP_TYPE_REUSEPORT_SOCKARRAY); + __type(key, __u32); + __type(value, __u64); + __uint(max_entries, 3); +} listeners SEC(".maps"); + +#define ETH_P_IP 0x0800 +#define ETH_P_IPV6 0x86DD +#define AF_INET6 10 + +SEC("sk_reuseport/migrate") +int select_or_migrate(struct sk_reuseport_md *md) +{ + __u32 app = 0; + __u32 wake = 1; + __u32 probe = 2; + + if (!bpf_sk_select_reuseport(md, &listeners, &app, 0)) + return SK_PASS; + if (!bpf_sk_select_reuseport(md, &listeners, &wake, 0)) + return SK_PASS; + if (!bpf_sk_select_reuseport(md, &listeners, &probe, 0)) + return SK_PASS; + + return SK_DROP; +} diff --git a/activator/reuse/reuseport_bpfeb.go b/activator/reuse/reuseport_bpfeb.go new file mode 100644 index 0000000..c7344c3 --- /dev/null +++ b/activator/reuse/reuseport_bpfeb.go @@ -0,0 +1,133 @@ +// Code generated by bpf2go; DO NOT EDIT. +//go:build mips || mips64 || ppc64 || s390x + +package reuse + +import ( + "bytes" + _ "embed" + "fmt" + "io" + + "github.com/cilium/ebpf" +) + +// loadReuseport returns the embedded CollectionSpec for reuseport. +func loadReuseport() (*ebpf.CollectionSpec, error) { + reader := bytes.NewReader(_ReuseportBytes) + spec, err := ebpf.LoadCollectionSpecFromReader(reader) + if err != nil { + return nil, fmt.Errorf("can't load reuseport: %w", err) + } + + return spec, err +} + +// loadReuseportObjects loads reuseport and converts it into a struct. +// +// The following types are suitable as obj argument: +// +// *reuseportObjects +// *reuseportPrograms +// *reuseportMaps +// +// See ebpf.CollectionSpec.LoadAndAssign documentation for details. +func loadReuseportObjects(obj interface{}, opts *ebpf.CollectionOptions) error { + spec, err := loadReuseport() + if err != nil { + return err + } + + return spec.LoadAndAssign(obj, opts) +} + +// reuseportSpecs contains maps and programs before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type reuseportSpecs struct { + reuseportProgramSpecs + reuseportMapSpecs + reuseportVariableSpecs +} + +// reuseportProgramSpecs contains programs before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type reuseportProgramSpecs struct { + SelectOrMigrate *ebpf.ProgramSpec `ebpf:"select_or_migrate"` +} + +// reuseportMapSpecs contains maps before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type reuseportMapSpecs struct { + Listeners *ebpf.MapSpec `ebpf:"listeners"` +} + +// reuseportVariableSpecs contains global variables before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type reuseportVariableSpecs struct { +} + +// reuseportObjects contains all objects after they have been loaded into the kernel. +// +// It can be passed to loadReuseportObjects or ebpf.CollectionSpec.LoadAndAssign. +type reuseportObjects struct { + reuseportPrograms + reuseportMaps + reuseportVariables +} + +func (o *reuseportObjects) Close() error { + return _ReuseportClose( + &o.reuseportPrograms, + &o.reuseportMaps, + ) +} + +// reuseportMaps contains all maps after they have been loaded into the kernel. +// +// It can be passed to loadReuseportObjects or ebpf.CollectionSpec.LoadAndAssign. +type reuseportMaps struct { + Listeners *ebpf.Map `ebpf:"listeners"` +} + +func (m *reuseportMaps) Close() error { + return _ReuseportClose( + m.Listeners, + ) +} + +// reuseportVariables contains all global variables after they have been loaded into the kernel. +// +// It can be passed to loadReuseportObjects or ebpf.CollectionSpec.LoadAndAssign. +type reuseportVariables struct { +} + +// reuseportPrograms contains all programs after they have been loaded into the kernel. +// +// It can be passed to loadReuseportObjects or ebpf.CollectionSpec.LoadAndAssign. +type reuseportPrograms struct { + SelectOrMigrate *ebpf.Program `ebpf:"select_or_migrate"` +} + +func (p *reuseportPrograms) Close() error { + return _ReuseportClose( + p.SelectOrMigrate, + ) +} + +func _ReuseportClose(closers ...io.Closer) error { + for _, closer := range closers { + if err := closer.Close(); err != nil { + return err + } + } + return nil +} + +// Do not access this directly. +// +//go:embed reuseport_bpfeb.o +var _ReuseportBytes []byte diff --git a/activator/reuse/reuseport_bpfeb.o b/activator/reuse/reuseport_bpfeb.o new file mode 100644 index 0000000000000000000000000000000000000000..f936d59aa4cb5c025b61b1c8dc2a86d3f673f319 GIT binary patch literal 3224 zcmb_ePiP!f82@HWo75&+wQ8zjUqMPLVH2YiQIu_IS}RdP4AKfRne0xJF}t(t>};DT z>RtrFiw8w-Mi144hg>Ayl8ew|z?-MiYY!eQ*h6If{ocGcI~fxt;s@V*-|zeX{>pGH=BY!~7DKZO$Lzgrvn{h~-jd!&y>qpYL@=bS}()ygnPUU*{uEwd|h5Zik z#tYgm{o^9tZg+d*(G(A>bhhJqIh8(6rczm2T9rA^I(#`2dO9zVJ?H;19Pn%@P|fT#r&y} zH!*){;p&bfkqH%J z5(WL~oc?k6k{JIoFN~%zO2qTd%*>p*?7eaEtx0e8^7N$VLDznELfTO)T!@0IO5NJ0 zpX;e=jc7q}kYuG9$WpK(SN&Q$kh;I@1yK@*K}%|3D+!_?Zb@s&i-UG6Xg1=+t5>BK zL=q&6UNdeajY^{?VY4UChf&oFBR^V^MZdKuRX_3dfW%d#l6trh`$-rrcmz-dwV;xC zjo3>q!H#-kR#_U$dMH%{i&B3J9BCzSy8^?`e$~_U>M2nmy)(*hHq}dN{KcH=n!gl4 z_e@@g)y-2mkt)M0YUIRx^9s85Oy#Vhk$QDhoy;~2GHQ&f@l$Ep{e`lZ{~D`%PJ=&? z%Az0RGStFK5VZm+)%_+g4?2L(g&$mPwd=_bm@hhY4Z;GrDzhW@D*=D|G4)cxq#Ng}V^wGYS!?fQp z_?9?>u`wSjbDwJFGl55=pm(^gqj>1}rsYWiybV2`jvd5zlQa!x zF5Amz1-!KryB&l1W`NwUFiKn#X+rfcJ_RUAp26xr7YEISL>c%t;Tq>c6ksOod2k^MJU=;Z&Q1*9q52b*}{7bA77#?1D-2`O7#ygy|+>_YZ@Y2r8XFY)?*=F<%1z&XhL zR!C(%Wr?YS z*v9ufwB&SBMc?lQLw^6R!M4ZxvoZ=kT)+K^wFa)A@6;ak4<@jYZtAf&kt10_T+5@ literal 0 HcmV?d00001 diff --git a/activator/reuse/reuseport_bpfel.go b/activator/reuse/reuseport_bpfel.go new file mode 100644 index 0000000..5d67958 --- /dev/null +++ b/activator/reuse/reuseport_bpfel.go @@ -0,0 +1,133 @@ +// Code generated by bpf2go; DO NOT EDIT. +//go:build 386 || amd64 || arm || arm64 || loong64 || mips64le || mipsle || ppc64le || riscv64 || wasm + +package reuse + +import ( + "bytes" + _ "embed" + "fmt" + "io" + + "github.com/cilium/ebpf" +) + +// loadReuseport returns the embedded CollectionSpec for reuseport. +func loadReuseport() (*ebpf.CollectionSpec, error) { + reader := bytes.NewReader(_ReuseportBytes) + spec, err := ebpf.LoadCollectionSpecFromReader(reader) + if err != nil { + return nil, fmt.Errorf("can't load reuseport: %w", err) + } + + return spec, err +} + +// loadReuseportObjects loads reuseport and converts it into a struct. +// +// The following types are suitable as obj argument: +// +// *reuseportObjects +// *reuseportPrograms +// *reuseportMaps +// +// See ebpf.CollectionSpec.LoadAndAssign documentation for details. +func loadReuseportObjects(obj interface{}, opts *ebpf.CollectionOptions) error { + spec, err := loadReuseport() + if err != nil { + return err + } + + return spec.LoadAndAssign(obj, opts) +} + +// reuseportSpecs contains maps and programs before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type reuseportSpecs struct { + reuseportProgramSpecs + reuseportMapSpecs + reuseportVariableSpecs +} + +// reuseportProgramSpecs contains programs before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type reuseportProgramSpecs struct { + SelectOrMigrate *ebpf.ProgramSpec `ebpf:"select_or_migrate"` +} + +// reuseportMapSpecs contains maps before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type reuseportMapSpecs struct { + Listeners *ebpf.MapSpec `ebpf:"listeners"` +} + +// reuseportVariableSpecs contains global variables before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type reuseportVariableSpecs struct { +} + +// reuseportObjects contains all objects after they have been loaded into the kernel. +// +// It can be passed to loadReuseportObjects or ebpf.CollectionSpec.LoadAndAssign. +type reuseportObjects struct { + reuseportPrograms + reuseportMaps + reuseportVariables +} + +func (o *reuseportObjects) Close() error { + return _ReuseportClose( + &o.reuseportPrograms, + &o.reuseportMaps, + ) +} + +// reuseportMaps contains all maps after they have been loaded into the kernel. +// +// It can be passed to loadReuseportObjects or ebpf.CollectionSpec.LoadAndAssign. +type reuseportMaps struct { + Listeners *ebpf.Map `ebpf:"listeners"` +} + +func (m *reuseportMaps) Close() error { + return _ReuseportClose( + m.Listeners, + ) +} + +// reuseportVariables contains all global variables after they have been loaded into the kernel. +// +// It can be passed to loadReuseportObjects or ebpf.CollectionSpec.LoadAndAssign. +type reuseportVariables struct { +} + +// reuseportPrograms contains all programs after they have been loaded into the kernel. +// +// It can be passed to loadReuseportObjects or ebpf.CollectionSpec.LoadAndAssign. +type reuseportPrograms struct { + SelectOrMigrate *ebpf.Program `ebpf:"select_or_migrate"` +} + +func (p *reuseportPrograms) Close() error { + return _ReuseportClose( + p.SelectOrMigrate, + ) +} + +func _ReuseportClose(closers ...io.Closer) error { + for _, closer := range closers { + if err := closer.Close(); err != nil { + return err + } + } + return nil +} + +// Do not access this directly. +// +//go:embed reuseport_bpfel.o +var _ReuseportBytes []byte diff --git a/activator/reuse/reuseport_bpfel.o b/activator/reuse/reuseport_bpfel.o new file mode 100644 index 0000000000000000000000000000000000000000..5f28736b324435e71f81f3b7fe5e30ffc2a626fa GIT binary patch literal 3224 zcmbtWO=w(I6h1RaZPFw)tyXIk`wCK036mJ52%=0&(^`oVVvtslmzSB>JjBnnw ziK5O%5Zt&>bZ1ad7cRPyxJx#LE(7jd6}K*2Sg?yo{J#4$^Ku(1(L>HV=lkwC_uT)< zM^n=miiLt$Dac>aMV1x0+~4)f$}P(fA~zn_{JKf1jBM|aS${}WKb33uG)8+7d}ZXW z!W-Y}yn{U=+dDfu8}Dj-oIyER@73UAm|5sCIiiSs{=I$W>xty^@9ryKPn7ecY|JYo zUuYxeTS4r-eray};>@(69%#P)y&%U;#OIhh^0m#lfz>YYYmY4fT6H*eR$v7V;W= zj;{=T1Ij+z&^hP;bQ3xcg&ZEj$L7H;4&!qTit+Wn2usnYK>Lrtl%elIIoCGyL*uW( zero(p*e{KL2lgA|+hSb9vMKx+{I>C74sg8RLytmpQnbE}`4L1u#_~UbKW2lqEk13q zjrrM$0YAh7x1bM0Z$rTi^2(jmmDSC~*gz{$Tfn{M8Q?me(s74J;4^3f7?$11VSXSU z^h}O_k|c!rujqUp8<8l<#P`q6&Yr#Ezj^8HDSz(D%#`ngYdt?Ht)v+(CSldnVXZSS zbg8(WEPDJ%w%Q0~Ib4ER; zVYcKq(t1{})MJSnU4J1;s(zFN$*L>`%_XS@S)e}XxQec%7A>Yh7A1>50jMwzE16$U zeccl7syA-Q(s*YKr3&Zn-IqAp%+gi`4ZFwdJzJ}u77wCU#tRw^?`3b|r5tr5SPsEG zm*+6M1(K7RjIMg4Cl?x5F>2pb?hI(ORvq(BbruXhYK(akr*+x=rE)C)HCK&UCx0N7 zr69#&h@(oFG(#!Xf(Cb0BQ=wHWm$x8o~I6!ez$ns)G59;S_Z9>xDxbI? z__o2nv3(F9{IUNNyhBd`{EPJHr+Zfv-`b-&e%N%wwK<|*H68A0Bkw4lFRB*aRmzMu zYVG(KeCFUS2ew~1K)HeFz2X}|Se=dowZ|BediT0|WnGL;z_Pn_D+2>yMJyXcu wE7oV6TmKnwJ<~gNm^QQ{TPD!m7k8{oG*3w +#include +#include +#include + +char __license[] SEC("license") = "Dual MIT/GPL"; + +#define SOL_SOCKET 1 +#define SO_REUSEPORT 15 + +SEC("cgroup/setsockopt") +int setsockopt(struct bpf_sockopt *ctx) +{ + struct bpf_sock *sk = ctx->sk; + + if (!sk) + return 1; + + if (sk->protocol != IPPROTO_TCP) + return 1; + + int reuseport_value = 1; + // TODO: + // * check what happens when SO_REUSEPORT is already set + // * do we care about the return code? + bpf_setsockopt(sk, SOL_SOCKET, SO_REUSEPORT, &reuseport_value, sizeof(reuseport_value)); + + return 1; +} diff --git a/activator/reuse/sockopt_bpfeb.go b/activator/reuse/sockopt_bpfeb.go new file mode 100644 index 0000000..b80c277 --- /dev/null +++ b/activator/reuse/sockopt_bpfeb.go @@ -0,0 +1,129 @@ +// Code generated by bpf2go; DO NOT EDIT. +//go:build mips || mips64 || ppc64 || s390x + +package reuse + +import ( + "bytes" + _ "embed" + "fmt" + "io" + + "github.com/cilium/ebpf" +) + +// loadSockopt returns the embedded CollectionSpec for sockopt. +func loadSockopt() (*ebpf.CollectionSpec, error) { + reader := bytes.NewReader(_SockoptBytes) + spec, err := ebpf.LoadCollectionSpecFromReader(reader) + if err != nil { + return nil, fmt.Errorf("can't load sockopt: %w", err) + } + + return spec, err +} + +// loadSockoptObjects loads sockopt and converts it into a struct. +// +// The following types are suitable as obj argument: +// +// *sockoptObjects +// *sockoptPrograms +// *sockoptMaps +// +// See ebpf.CollectionSpec.LoadAndAssign documentation for details. +func loadSockoptObjects(obj interface{}, opts *ebpf.CollectionOptions) error { + spec, err := loadSockopt() + if err != nil { + return err + } + + return spec.LoadAndAssign(obj, opts) +} + +// sockoptSpecs contains maps and programs before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type sockoptSpecs struct { + sockoptProgramSpecs + sockoptMapSpecs + sockoptVariableSpecs +} + +// sockoptProgramSpecs contains programs before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type sockoptProgramSpecs struct { + Setsockopt *ebpf.ProgramSpec `ebpf:"setsockopt"` +} + +// sockoptMapSpecs contains maps before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type sockoptMapSpecs struct { +} + +// sockoptVariableSpecs contains global variables before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type sockoptVariableSpecs struct { +} + +// sockoptObjects contains all objects after they have been loaded into the kernel. +// +// It can be passed to loadSockoptObjects or ebpf.CollectionSpec.LoadAndAssign. +type sockoptObjects struct { + sockoptPrograms + sockoptMaps + sockoptVariables +} + +func (o *sockoptObjects) Close() error { + return _SockoptClose( + &o.sockoptPrograms, + &o.sockoptMaps, + ) +} + +// sockoptMaps contains all maps after they have been loaded into the kernel. +// +// It can be passed to loadSockoptObjects or ebpf.CollectionSpec.LoadAndAssign. +type sockoptMaps struct { +} + +func (m *sockoptMaps) Close() error { + return _SockoptClose() +} + +// sockoptVariables contains all global variables after they have been loaded into the kernel. +// +// It can be passed to loadSockoptObjects or ebpf.CollectionSpec.LoadAndAssign. +type sockoptVariables struct { +} + +// sockoptPrograms contains all programs after they have been loaded into the kernel. +// +// It can be passed to loadSockoptObjects or ebpf.CollectionSpec.LoadAndAssign. +type sockoptPrograms struct { + Setsockopt *ebpf.Program `ebpf:"setsockopt"` +} + +func (p *sockoptPrograms) Close() error { + return _SockoptClose( + p.Setsockopt, + ) +} + +func _SockoptClose(closers ...io.Closer) error { + for _, closer := range closers { + if err := closer.Close(); err != nil { + return err + } + } + return nil +} + +// Do not access this directly. +// +//go:embed sockopt_bpfeb.o +var _SockoptBytes []byte diff --git a/activator/reuse/sockopt_bpfeb.o b/activator/reuse/sockopt_bpfeb.o new file mode 100644 index 0000000000000000000000000000000000000000..aff53362fea5693348c75d8c480a85903a70d924 GIT binary patch literal 2176 zcmb_d&ujH&^EM5e+r4qqzB}n;FMDJf`|;nfq+|Ej!{c58)vft%Nwt|yN&`X zYA(HVsnlC5BqWa9!i}6c^-ti|L;rwYklgQ^ommYFsFyzJ&G&xIdv9mn*grR#Yg1F6 z6y(W2kR3zefiQEVwYphn#k>2VmgUoVd6!aeK~4~FDme}~cBrU{7d)K2r10!ISCQj& zk;!E8^6(3-&Kv)*04+HTVH_wTyJlO`-f3GzMaQ@N4g zRZt38%}p|GkT3(TQvfmM0Q^4q9qNL*B^Nv0MGsO)P z$KDlmpAHbu0xqvVr%~G=YT~{hd1#upMmv5Q2ZMN&Nfhpdkw6;uc0*zm4kZb*yj?}_Mwcc)bTHTi4z0x*8!%QXNI1NW}lKE(M z93tttJe@98v{+3COKPLl^fy{pZZx`-{Z8ZNMx)*8Ks#MZv!v4gy)fRXmh6j*7v#PK zcX|m9<5H({>6X8-{zJp>-fA~|AGW9;gu^rxi}r(Y_~sp`{37HNAo(Zo17qXee+M?# zEVGd3jm=(RANm;2K>-<0{WpviXN$4aABl816MS=4{|s`~=+8wq8DBU0Um_!nwS1rJ z-YVL%J;3xjVLqJ^E&QiGdfk2p-mmbuiuY!s*&oQ;$HH9J&v(b#Ra!=LmWBJ7)RHi&UGA>csJvmcqiAo}?`>}@icV6c7G9Igr_-9m%q#H|69ax?n!mM7E9$%BhCZyo2>tHXtMp&&iDA1 z`qM}7k)GsGtZse2;kVU)VRjqL{QxBlsP($we1pjT;T)9B{!tnj-1uEARNo50G* O2%A9ev2nKk$$tSqx!nZ- literal 0 HcmV?d00001 diff --git a/activator/reuse/sockopt_bpfel.go b/activator/reuse/sockopt_bpfel.go new file mode 100644 index 0000000..1caf6b8 --- /dev/null +++ b/activator/reuse/sockopt_bpfel.go @@ -0,0 +1,129 @@ +// Code generated by bpf2go; DO NOT EDIT. +//go:build 386 || amd64 || arm || arm64 || loong64 || mips64le || mipsle || ppc64le || riscv64 || wasm + +package reuse + +import ( + "bytes" + _ "embed" + "fmt" + "io" + + "github.com/cilium/ebpf" +) + +// loadSockopt returns the embedded CollectionSpec for sockopt. +func loadSockopt() (*ebpf.CollectionSpec, error) { + reader := bytes.NewReader(_SockoptBytes) + spec, err := ebpf.LoadCollectionSpecFromReader(reader) + if err != nil { + return nil, fmt.Errorf("can't load sockopt: %w", err) + } + + return spec, err +} + +// loadSockoptObjects loads sockopt and converts it into a struct. +// +// The following types are suitable as obj argument: +// +// *sockoptObjects +// *sockoptPrograms +// *sockoptMaps +// +// See ebpf.CollectionSpec.LoadAndAssign documentation for details. +func loadSockoptObjects(obj interface{}, opts *ebpf.CollectionOptions) error { + spec, err := loadSockopt() + if err != nil { + return err + } + + return spec.LoadAndAssign(obj, opts) +} + +// sockoptSpecs contains maps and programs before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type sockoptSpecs struct { + sockoptProgramSpecs + sockoptMapSpecs + sockoptVariableSpecs +} + +// sockoptProgramSpecs contains programs before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type sockoptProgramSpecs struct { + Setsockopt *ebpf.ProgramSpec `ebpf:"setsockopt"` +} + +// sockoptMapSpecs contains maps before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type sockoptMapSpecs struct { +} + +// sockoptVariableSpecs contains global variables before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type sockoptVariableSpecs struct { +} + +// sockoptObjects contains all objects after they have been loaded into the kernel. +// +// It can be passed to loadSockoptObjects or ebpf.CollectionSpec.LoadAndAssign. +type sockoptObjects struct { + sockoptPrograms + sockoptMaps + sockoptVariables +} + +func (o *sockoptObjects) Close() error { + return _SockoptClose( + &o.sockoptPrograms, + &o.sockoptMaps, + ) +} + +// sockoptMaps contains all maps after they have been loaded into the kernel. +// +// It can be passed to loadSockoptObjects or ebpf.CollectionSpec.LoadAndAssign. +type sockoptMaps struct { +} + +func (m *sockoptMaps) Close() error { + return _SockoptClose() +} + +// sockoptVariables contains all global variables after they have been loaded into the kernel. +// +// It can be passed to loadSockoptObjects or ebpf.CollectionSpec.LoadAndAssign. +type sockoptVariables struct { +} + +// sockoptPrograms contains all programs after they have been loaded into the kernel. +// +// It can be passed to loadSockoptObjects or ebpf.CollectionSpec.LoadAndAssign. +type sockoptPrograms struct { + Setsockopt *ebpf.Program `ebpf:"setsockopt"` +} + +func (p *sockoptPrograms) Close() error { + return _SockoptClose( + p.Setsockopt, + ) +} + +func _SockoptClose(closers ...io.Closer) error { + for _, closer := range closers { + if err := closer.Close(); err != nil { + return err + } + } + return nil +} + +// Do not access this directly. +// +//go:embed sockopt_bpfel.o +var _SockoptBytes []byte diff --git a/activator/reuse/sockopt_bpfel.o b/activator/reuse/sockopt_bpfel.o new file mode 100644 index 0000000000000000000000000000000000000000..9d607d008d712e52fd2a5e45a4bddcd4e81e73cd GIT binary patch literal 2176 zcmbtVOHUI~6h18?R6zkBF>y1vFvVaAV%!)>6hGbKngvT^Um z#GNiQap_KXvUcT9VCTXg;KrnW-^{&boDepiaC**n-uE@UEG!h$sg!6+$!|G8+A6Zw zd!Xk-H7_R-`D{3{pG##zr8Y7U%B6Il9EbKLEnz+D%AXD$-#&zH={qL!r_crjh0`a?FDY-xe6d;hib1--sZNvONl+A`wB52hm zE+?-LVq_OQ2<`{(fzK#?AM&EoS@4q54b=;xmpNl#&L5+++8U;XG2?J@Ph!L|L((x* zKsshRa`kg(XCpnu9!9h@)*Ynp9vHfCV;~1kKo)5Lq`-U;Qd__iItAu>=T)4lD`tdG z(MPq8AN=u%q8~{5oa^du z8HUu?jO?i280!MRado=oxq)lBjxl=6m@AhnrE1Bn&XiS9GcY{6?b|Ka3rq~#wo!C4 zDi^luj+pfuj2nJ^$9C7U3H#XCO?e^KM$N-! z+^$q^KQ*b({}bHX5_tqkJc|KR z9P9|{`R9d3fqZ)-G5dzfzYaMZdvUyzq;0iO-eEqgA literal 0 HcmV?d00001 diff --git a/go.mod b/go.mod index fa500c1..80532fd 100644 --- a/go.mod +++ b/go.mod @@ -48,6 +48,8 @@ require ( sigs.k8s.io/kustomize/kyaml v0.16.0 ) +// replace github.com/vishvananda/netlink => ../netlink + require ( al.essio.dev/pkg/shellescape v1.5.1 // indirect dario.cat/mergo v1.0.1 // indirect diff --git a/shim/checkpoint.go b/shim/checkpoint.go index f2f96fd..f6fabe2 100644 --- a/shim/checkpoint.go +++ b/shim/checkpoint.go @@ -24,7 +24,7 @@ func (c *Container) scaleDown(ctx context.Context) error { return nil } - if err := c.activator.Reset(); err != nil { + if err := c.activator.ScaleDown(); err != nil { return err } @@ -94,7 +94,8 @@ func (c *Container) checkpoint(ctx context.Context) error { resetOnErr := func() { c.DeleteCheckpointedPID(c.Pid()) - _ = c.activator.DisableRedirects() + // TODO: implement? + // _ = c.activator.DisableRedirects() lines := printCriuLogs(ctx, filepath.Join(workDir, "dump.log")) c.sendFailEvent(v1.ContainerPhase_CHECKPOINT_FAILED, lines) } diff --git a/shim/container.go b/shim/container.go index d8d5641..9f3737e 100644 --- a/shim/container.go +++ b/shim/container.go @@ -19,6 +19,7 @@ import ( "github.com/containerd/log" "github.com/containernetworking/plugins/pkg/ns" "github.com/ctrox/zeropod/activator" + "github.com/ctrox/zeropod/activator/reuse" nodev1 "github.com/ctrox/zeropod/api/node/v1" v1 "github.com/ctrox/zeropod/api/shim/v1" "google.golang.org/protobuf/proto" @@ -38,7 +39,7 @@ type Container struct { context context.Context id string createOpts *anypb.Any - activator *activator.Server + activator *reuse.Activator cfg *v1.Config initialProcess process.Process process process.Process @@ -300,7 +301,7 @@ func (c *Container) InitialProcess() process.Process { func (c *Container) StopActivator(ctx context.Context) { if c.activator != nil { - c.activator.Stop(ctx) + c.activator.Stop() } } @@ -385,16 +386,16 @@ func (c *Container) initActivator(ctx context.Context, enableRedirects bool) err c.cancelInit() if c.activator == nil { - act, err := activator.NewServer(ctx, c.netNS) + act, err := reuse.New(ctx, c.netNS, c.cfg.Spec.Linux.CgroupsPath) if err != nil { return err } - if c.cfg.ProxyTimeout > 0 { - act.SetProxyTimeout(c.cfg.ProxyTimeout) - } - if c.cfg.ConnectTimeout > 0 { - act.SetConnectTimeout(c.cfg.ConnectTimeout) - } + // if c.cfg.ProxyTimeout > 0 { + // act.SetProxyTimeout(c.cfg.ProxyTimeout) + // } + // if c.cfg.ConnectTimeout > 0 { + // act.SetConnectTimeout(c.cfg.ConnectTimeout) + // } c.activator = act } @@ -416,7 +417,7 @@ func (c *Container) initActivator(ctx context.Context, enableRedirects bool) err log.G(ctx).Infof("starting activator with ports: %v", c.cfg.Ports) if err := c.startActivator(ctx, c.cfg.Ports...); err != nil { - if errors.Is(err, activator.ErrMapNotFound) { + if errors.Is(err, activator.ErrMapNotFound) || errors.Is(err, reuse.ErrListenersNotFound) { c.retryInitIn(c.initRetry(), enableRedirects) return nil } @@ -424,7 +425,7 @@ func (c *Container) initActivator(ctx context.Context, enableRedirects bool) err } if enableRedirects { - return c.activator.Reset() + return c.activator.ScaleDown() } return nil } @@ -464,11 +465,12 @@ func (c *Container) startActivator(ctx context.Context, ports ...uint16) error { if c.activator.Started() { return nil } - if err := c.activator.AttachExec(); err != nil { - log.G(ctx).WithError(err).Error("failed to attach activator") - return err - } - if err := c.activator.Start(c.context, c.detectProbe(c.context), c.restoreHandler(c.context), ports...); err != nil { + // if err := c.activator.AttachExec(); err != nil { + // log.G(ctx).WithError(err).Error("failed to attach activator") + // return err + // } + + if err := c.activator.Start(c.context, c.detectProbe(c.context), c.restoreHandler(c.context), c.Pid(), ports...); err != nil { if errors.Is(err, activator.ErrMapNotFound) { return err } @@ -481,18 +483,16 @@ func (c *Container) startActivator(ctx context.Context, ports ...uint16) error { } func (c *Container) restoreHandler(ctx context.Context) activator.RestoreHook { - return func() error { - log.G(ctx).Printf("got a request") - + return func() (int, error) { restoredContainer, _, err := c.Restore(ctx) if err != nil { if errors.Is(err, ErrAlreadyRestored) { log.G(ctx).Info("container is already restored, ignoring request") - return nil + return c.Pid(), nil } if errors.Is(err, ErrNoCapacity) { log.G(ctx).Info("no capacity to restore, requests are being forwarded") - return nil + return 0, nil } // restore failed, this is currently unrecoverable, so we set the // process to exited and let the runtime recreate it. @@ -502,7 +502,7 @@ func (c *Container) restoreHandler(ctx context.Context) activator.RestoreHook { } c.Container = restoredContainer c.ScheduleScaleDown() - return nil + return c.Container.Pid(), nil } } diff --git a/shim/probe_test.go b/shim/probe_test.go index c856439..f512658 100644 --- a/shim/probe_test.go +++ b/shim/probe_test.go @@ -90,8 +90,8 @@ func TestDetectProbe(t *testing.T) { act.SetKubeletAddr(ptr.To(netip.MustParseAddr("127.0.0.1"))) } c := &Container{ - cfg: &v1.Config{AnnotationConfig: v1.AnnotationConfig{ProbeBufferSize: v1.DefaultProbeBufferSize}}, - activator: act, + cfg: &v1.Config{AnnotationConfig: v1.AnnotationConfig{ProbeBufferSize: v1.DefaultProbeBufferSize}}, + // activator: act, } newConn, cont, err := c.detectProbe(ctx)(conn) require.NoError(t, err) diff --git a/shim/restore.go b/shim/restore.go index 1b3b352..0a9d073 100644 --- a/shim/restore.go +++ b/shim/restore.go @@ -54,7 +54,8 @@ func (c *Container) Restore(ctx context.Context) (*runc.Container, process.Proce log.G(ctx).WithError(err).Error("requesting restore capacity") } else if !resp.Allowed { if resp.RedirectAddr != "" { - c.activator.ForwardToTarget(resp.RedirectAddr) + // TODO: implement ForwardToTarget + // c.activator.ForwardToTarget(resp.RedirectAddr) } return nil, nil, ErrNoCapacity } @@ -138,9 +139,10 @@ func (c *Container) restore(ctx context.Context) (*runc.Container, process.Proce } // process is running again, we don't need to redirect traffic anymore - if err := c.activator.DisableRedirects(); err != nil { - return nil, nil, fmt.Errorf("could not disable redirects: %w", err) - } + // TODO: probably no longer needed with the reuse activator? + // if err := c.activator.DisableRedirects(); err != nil { + // return nil, nil, fmt.Errorf("could not disable redirects: %w", err) + // } return container, p, nil } From 9e11408fc9c55d13d950e64b5ad812125abf8920 Mon Sep 17 00:00:00 2001 From: Cyrill Troxler Date: Sun, 19 Jul 2026 15:46:25 +0200 Subject: [PATCH 02/17] feat: add new ebpf tracker --- activator/reuse/tracker.c | 26 ++++++ activator/reuse/tracker_bpfeb.go | 133 +++++++++++++++++++++++++++++++ activator/reuse/tracker_bpfeb.o | Bin 0 -> 3408 bytes activator/reuse/tracker_bpfel.go | 133 +++++++++++++++++++++++++++++++ activator/reuse/tracker_bpfel.o | Bin 0 -> 3408 bytes 5 files changed, 292 insertions(+) create mode 100644 activator/reuse/tracker.c create mode 100644 activator/reuse/tracker_bpfeb.go create mode 100644 activator/reuse/tracker_bpfeb.o create mode 100644 activator/reuse/tracker_bpfel.go create mode 100644 activator/reuse/tracker_bpfel.o diff --git a/activator/reuse/tracker.c b/activator/reuse/tracker.c new file mode 100644 index 0000000..e5312f8 --- /dev/null +++ b/activator/reuse/tracker.c @@ -0,0 +1,26 @@ +//go:build ignore + +#include +#include + +char __license[] SEC("license") = "Dual MIT/GPL"; + +struct { + __uint(type, BPF_MAP_TYPE_HASH); + __type(key, __u32); // dest port + __type(value, __u64); // timestamp + __uint(max_entries, 128); // room for 128 ports in a container +} socket_tracker SEC(".maps"); + +SEC("cgroup_skb/ingress") +int track_ingress(struct __sk_buff *skb) { + __u32 dport = skb->local_port; + if (dport == 0) { + return 1; + } + + __u64 time = bpf_ktime_get_ns(); + bpf_map_update_elem(&socket_tracker, &dport, &time, BPF_ANY); + + return 1; +} diff --git a/activator/reuse/tracker_bpfeb.go b/activator/reuse/tracker_bpfeb.go new file mode 100644 index 0000000..c558502 --- /dev/null +++ b/activator/reuse/tracker_bpfeb.go @@ -0,0 +1,133 @@ +// Code generated by bpf2go; DO NOT EDIT. +//go:build mips || mips64 || ppc64 || s390x + +package reuse + +import ( + "bytes" + _ "embed" + "fmt" + "io" + + "github.com/cilium/ebpf" +) + +// loadTracker returns the embedded CollectionSpec for tracker. +func loadTracker() (*ebpf.CollectionSpec, error) { + reader := bytes.NewReader(_TrackerBytes) + spec, err := ebpf.LoadCollectionSpecFromReader(reader) + if err != nil { + return nil, fmt.Errorf("can't load tracker: %w", err) + } + + return spec, err +} + +// loadTrackerObjects loads tracker and converts it into a struct. +// +// The following types are suitable as obj argument: +// +// *trackerObjects +// *trackerPrograms +// *trackerMaps +// +// See ebpf.CollectionSpec.LoadAndAssign documentation for details. +func loadTrackerObjects(obj interface{}, opts *ebpf.CollectionOptions) error { + spec, err := loadTracker() + if err != nil { + return err + } + + return spec.LoadAndAssign(obj, opts) +} + +// trackerSpecs contains maps and programs before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type trackerSpecs struct { + trackerProgramSpecs + trackerMapSpecs + trackerVariableSpecs +} + +// trackerProgramSpecs contains programs before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type trackerProgramSpecs struct { + TrackIngress *ebpf.ProgramSpec `ebpf:"track_ingress"` +} + +// trackerMapSpecs contains maps before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type trackerMapSpecs struct { + SocketTracker *ebpf.MapSpec `ebpf:"socket_tracker"` +} + +// trackerVariableSpecs contains global variables before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type trackerVariableSpecs struct { +} + +// trackerObjects contains all objects after they have been loaded into the kernel. +// +// It can be passed to loadTrackerObjects or ebpf.CollectionSpec.LoadAndAssign. +type trackerObjects struct { + trackerPrograms + trackerMaps + trackerVariables +} + +func (o *trackerObjects) Close() error { + return _TrackerClose( + &o.trackerPrograms, + &o.trackerMaps, + ) +} + +// trackerMaps contains all maps after they have been loaded into the kernel. +// +// It can be passed to loadTrackerObjects or ebpf.CollectionSpec.LoadAndAssign. +type trackerMaps struct { + SocketTracker *ebpf.Map `ebpf:"socket_tracker"` +} + +func (m *trackerMaps) Close() error { + return _TrackerClose( + m.SocketTracker, + ) +} + +// trackerVariables contains all global variables after they have been loaded into the kernel. +// +// It can be passed to loadTrackerObjects or ebpf.CollectionSpec.LoadAndAssign. +type trackerVariables struct { +} + +// trackerPrograms contains all programs after they have been loaded into the kernel. +// +// It can be passed to loadTrackerObjects or ebpf.CollectionSpec.LoadAndAssign. +type trackerPrograms struct { + TrackIngress *ebpf.Program `ebpf:"track_ingress"` +} + +func (p *trackerPrograms) Close() error { + return _TrackerClose( + p.TrackIngress, + ) +} + +func _TrackerClose(closers ...io.Closer) error { + for _, closer := range closers { + if err := closer.Close(); err != nil { + return err + } + } + return nil +} + +// Do not access this directly. +// +//go:embed tracker_bpfeb.o +var _TrackerBytes []byte diff --git a/activator/reuse/tracker_bpfeb.o b/activator/reuse/tracker_bpfeb.o new file mode 100644 index 0000000000000000000000000000000000000000..bf8c61a1d00ded2441e9cc313185d45379f22945 GIT binary patch literal 3408 zcmb_eO^g&p6s{R|f#pX*LBXF`av+OY2ZChdPtbv|{21J9U=L!5HN7)EJDus79=m&% zU63#yG(<1PM2#mFFUG_KJi*1V2?_Dw#hV8Y96XR16E4OJ$@+cOuV!aPRxiHf)%)I8 zuU`H1tD3nqaq?(BpHp4QslR}Gh;9$ShAq}BO1oL*yshdoz4F!N2ejL_s139qvQcXI z!s7CMf?F@JRcf79YI%A2!L3)VtJdwa{{0{o(2uwM&aguNzs3HGMo zyRf%2Y?ttpU=91L;3DjAf=jS}K(}Ja9az>C)|1z;e+n+jcF322c@D%KU~ZXs5%>wg zOTfVV-zyKbpsI`WpD4;6>nLz{oR1{{D?h5QS za+G{#G)+&;w{UqzRwU+mjQx(q1i?MZeb0mt$!m*=7~#2Fu#dvtMgf!C3Hmb^4{Ou# zltrF~ShmP;*|`_Ep21H-0mX z13ytoRIdA}Nn;N-M%JWmX4=)N3jL;P)zQPT4KJ>%_u78jHw~}V3XroEM`=`!LNyn9 zP1B0~1SvBoEeDQ83?hRl4$=jMVF*i1Pz{~P8J7Q=O=l2<@n1rF9tiK?Ac<6cJrz{ z8%OOHj(KLUqY8WF_zPvFA@ui22Gsz)W@px(DfUvLA*59l;# z_!u|Ss+u~nnZ*ZgCZl_@q2%!qO}mBN`^FFb#^~<;G8oglZE{#97}JNRj+#T0XOQ8d zvimY749b2p@l^r266HK5UpW(c%#5Oz-!Ux(&U;LKANr|qyyHIuyF2p~Fy3{`$#ux# zP0iu`Ji^~Y#yg+C4~&JM$NP00SIpjZ`g@dm8}A|Sp6#d4_~YVFDs`4`P)&TSr{>lG z`k#XP-}3}?`?vAY?RpvDTloeae!g|RqT!qcZ{NP24*srDur`}Z*0JVC@rT%nuDfW6 z#aCm%jCFo-z@HlMO9Osu!0!zBIFr8oi_YJ;d6O!n{(Pzmu^$!=PaiGN>92WqJ*@6+ z>GYSLDum%&!+4cSjF$~p%2ie&N#oR;QH5loVXaJuh5S!aMV`U$C#gsHUx9KdGu^hg zPKcd9_`QqW5&gh@FS5I#|23ZV)GOl-WllVJ-<2ht+sy|Z|CR! z-OsC=pZn*Vu*&@FuA`6QZ04=pH~P%E%KRg4o(^I-zl(D`=bwz0Pug>5P``{^7Ju-& b^scvw82QW7KN?SENf_1-$GA8*|Bk-_YZ{*w literal 0 HcmV?d00001 diff --git a/activator/reuse/tracker_bpfel.go b/activator/reuse/tracker_bpfel.go new file mode 100644 index 0000000..0681e48 --- /dev/null +++ b/activator/reuse/tracker_bpfel.go @@ -0,0 +1,133 @@ +// Code generated by bpf2go; DO NOT EDIT. +//go:build 386 || amd64 || arm || arm64 || loong64 || mips64le || mipsle || ppc64le || riscv64 || wasm + +package reuse + +import ( + "bytes" + _ "embed" + "fmt" + "io" + + "github.com/cilium/ebpf" +) + +// loadTracker returns the embedded CollectionSpec for tracker. +func loadTracker() (*ebpf.CollectionSpec, error) { + reader := bytes.NewReader(_TrackerBytes) + spec, err := ebpf.LoadCollectionSpecFromReader(reader) + if err != nil { + return nil, fmt.Errorf("can't load tracker: %w", err) + } + + return spec, err +} + +// loadTrackerObjects loads tracker and converts it into a struct. +// +// The following types are suitable as obj argument: +// +// *trackerObjects +// *trackerPrograms +// *trackerMaps +// +// See ebpf.CollectionSpec.LoadAndAssign documentation for details. +func loadTrackerObjects(obj interface{}, opts *ebpf.CollectionOptions) error { + spec, err := loadTracker() + if err != nil { + return err + } + + return spec.LoadAndAssign(obj, opts) +} + +// trackerSpecs contains maps and programs before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type trackerSpecs struct { + trackerProgramSpecs + trackerMapSpecs + trackerVariableSpecs +} + +// trackerProgramSpecs contains programs before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type trackerProgramSpecs struct { + TrackIngress *ebpf.ProgramSpec `ebpf:"track_ingress"` +} + +// trackerMapSpecs contains maps before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type trackerMapSpecs struct { + SocketTracker *ebpf.MapSpec `ebpf:"socket_tracker"` +} + +// trackerVariableSpecs contains global variables before they are loaded into the kernel. +// +// It can be passed ebpf.CollectionSpec.Assign. +type trackerVariableSpecs struct { +} + +// trackerObjects contains all objects after they have been loaded into the kernel. +// +// It can be passed to loadTrackerObjects or ebpf.CollectionSpec.LoadAndAssign. +type trackerObjects struct { + trackerPrograms + trackerMaps + trackerVariables +} + +func (o *trackerObjects) Close() error { + return _TrackerClose( + &o.trackerPrograms, + &o.trackerMaps, + ) +} + +// trackerMaps contains all maps after they have been loaded into the kernel. +// +// It can be passed to loadTrackerObjects or ebpf.CollectionSpec.LoadAndAssign. +type trackerMaps struct { + SocketTracker *ebpf.Map `ebpf:"socket_tracker"` +} + +func (m *trackerMaps) Close() error { + return _TrackerClose( + m.SocketTracker, + ) +} + +// trackerVariables contains all global variables after they have been loaded into the kernel. +// +// It can be passed to loadTrackerObjects or ebpf.CollectionSpec.LoadAndAssign. +type trackerVariables struct { +} + +// trackerPrograms contains all programs after they have been loaded into the kernel. +// +// It can be passed to loadTrackerObjects or ebpf.CollectionSpec.LoadAndAssign. +type trackerPrograms struct { + TrackIngress *ebpf.Program `ebpf:"track_ingress"` +} + +func (p *trackerPrograms) Close() error { + return _TrackerClose( + p.TrackIngress, + ) +} + +func _TrackerClose(closers ...io.Closer) error { + for _, closer := range closers { + if err := closer.Close(); err != nil { + return err + } + } + return nil +} + +// Do not access this directly. +// +//go:embed tracker_bpfel.o +var _TrackerBytes []byte diff --git a/activator/reuse/tracker_bpfel.o b/activator/reuse/tracker_bpfel.o new file mode 100644 index 0000000000000000000000000000000000000000..c804f7d2914467b4a0c33c439aabbe3e285e1a61 GIT binary patch literal 3408 zcmbtWO^g&p6s{RqSy^`Z6I@YZ%YiHj4hG3aW6*)HAO^_>_8`Vk(>v2M+nJu}w!3H9 z1qtIpL*znC)OcdWgE27yPH-`7LP9ur@#et;2M#30WG}`G$@+a=uXcXeaPehczwdkX z-m9Oks-8;|CywTGIb|iM{#6}jy-ICb-@(NU7S%8!-OZOXR^IVsnP6Ma1bzWL0KKq& zDf8dG&Q_(?<&}D}yu5t(N8xLfS^^*K>-6?o)6P0bQMaKC`36ck(sBdm!{bx?j!m90 zo@YO={gqRr67m>*Qtz{{kvyoKcaB{`p|v;>8W z4C7(*0P~yh2%)=BcM*0T$~jRkLWv#dmx7D1R|J<}zZcwwy)JkG_J-g^*gJwB!rl|i zLHs7z0sd2P5%`hd67b)^o1tysCGk6XrT!6I1XgI{I7`3-g4@6&f){|d3tj}?Dfl7q zm|(u~{lHsL#{oVlcmepB#5h>|(}Ih@X9bslDO;g!;2HS&z88T*iQx;H6YTJ1LAF7Q zz@Ll14g3}Gi|{W1e+!(|k$AW<8Z%dR*>U&!WjI`x0q%us0534HBY8)#jrkd1d#9Z! z{~8{@zz-SZIl5(Vc5|>U1+HN%qq+;Q5%wM|ej9iuzGed`IQJwCC7Z*`030Xx<98-* z%jbYZq32GgVq2I(6#M8GZWr#}j($%;bdD z@U`CDuUgH-uQk1jW5QbF2Rg1GY}On;R5~Ads_xCJSvP2Ts^QLQubIZam#8Ex*S%Dy zu?ricYEswJt!h;TUQqQJA{V?{^c}%5-utfV+zgh9-l(lJD8%KFs&A7>of}fq046?dzc<3TcQnwMQbAIe;PQ8|d zI`L|W0seVUBFuWsoRj!!5T4UmSuA9oujH-H@|S1a7~W}>tu1DlOl$8gGa1`sQt8J_)U61!_p}#yjj`Rm+hDJ=J1Y*$0(+gqlSlQTlV?!jqRQr_b>Nr1 zX5y&=Y9-1t7VoSH87pH?^E>8nb3=HJsh>fwLMc3pzvIB*m&p!1d9Tx#9SYz_z)R54 zBPQPRA#lc$Z^hZ!_&#EU?*ZTPkvV&8Cm#YwNEUw*eBcw@cfzlN=SZF*Ys~TQiQs&; zbou9`^*z|lD_T}lE$e!tqRF}BeT+-jOYKFDhkNb_LRE9j~C>UF)L55ZMTq9`3>)u zVmIl+d>`Gi8{}E}c0bviK?}t0g5^+)!mas30(m|t{BOp2+I;Ij3m^OMUxPdFQSAOS z%*0wu`!;m7{09=`h_%M{Z~1uu=J(5Eaoq1)*#7mKMciuhe=Hq2Qit>BePa8!^XGre z)%w3Fm(NYfx2C^;hOO5BpzNQvB(i_H`upd9-Zdwd`8T!=U6IR@-~V3v$J#^&uCAw~ QBpuoP!#u{>{zoO_KSSQ0GXMYp literal 0 HcmV?d00001 From 24fa98f752ff00db426e0901e332cb5f9c8024fe Mon Sep 17 00:00:00 2001 From: Cyrill Troxler Date: Sun, 19 Jul 2026 15:46:48 +0200 Subject: [PATCH 03/17] refactor: make use of tracker --- activator/activator.go | 6 +- activator/reuse/activator.go | 537 ++++-------------------------- activator/reuse/listener.go | 463 ++++++++++++++++++++++++++ activator/reuse/probe.go | 28 ++ activator/reuse/reuseport_bpfeb.o | Bin 3224 -> 3224 bytes activator/reuse/reuseport_bpfel.o | Bin 3224 -> 3224 bytes shim/container.go | 2 +- 7 files changed, 568 insertions(+), 468 deletions(-) create mode 100644 activator/reuse/listener.go create mode 100644 activator/reuse/probe.go diff --git a/activator/activator.go b/activator/activator.go index 453cf0e..15b2273 100644 --- a/activator/activator.go +++ b/activator/activator.go @@ -510,7 +510,7 @@ func (s *Server) LastActivity(port uint16) (time.Time, error) { return time.Time{}, NoActivityRecordedErr{} } - return convertBPFTime(val) + return ConvertBPFTime(val) } func (s *Server) initActivityTracker() error { @@ -527,9 +527,9 @@ func netNSPath(pid int) string { return fmt.Sprintf("/proc/%d/ns/net", pid) } -// convertBPFTime takes the value of bpf_ktime_get_ns and converts it to a +// ConvertBPFTime takes the value of bpf_ktime_get_ns and converts it to a // time.Time. -func convertBPFTime(t uint64) (time.Time, error) { +func ConvertBPFTime(t uint64) (time.Time, error) { b, err := getBootTimeNS() if err != nil { return time.Time{}, err diff --git a/activator/reuse/activator.go b/activator/reuse/activator.go index 2c61cbf..a538591 100644 --- a/activator/reuse/activator.go +++ b/activator/reuse/activator.go @@ -2,17 +2,13 @@ package reuse import ( "context" - "errors" "fmt" "net" - "os" "path/filepath" - "slices" "strconv" "strings" "sync" "sync/atomic" - "syscall" "time" "github.com/cilium/ebpf" @@ -22,12 +18,11 @@ import ( "github.com/containerd/log" "github.com/containernetworking/plugins/pkg/ns" "github.com/ctrox/zeropod/activator" - "github.com/prometheus/procfs" - "golang.org/x/sys/unix" ) //go:generate go run github.com/cilium/ebpf/cmd/bpf2go -cc $BPF_CLANG -cflags $BPF_CFLAGS reuseport reuseport.c -- -I/headers //go:generate go run github.com/cilium/ebpf/cmd/bpf2go -cc $BPF_CLANG -cflags $BPF_CFLAGS sockopt sockopt.c +//go:generate go run github.com/cilium/ebpf/cmd/bpf2go -cc $BPF_CLANG -cflags $BPF_CFLAGS tracker tracker.c type network string @@ -37,50 +32,23 @@ const ( networkTCP6ONLY network = "tcp" ) -type wakeListener struct { - ln *net.TCPListener - lnFd *os.File - reuse *reuseportObjects -} - -type appListener struct { - fd int -} - -type listenerKey struct { - port uint16 - network network -} - -func (wl *wakeListener) closeListener() { - if wl.ln != nil { - _ = wl.ln.Close() - } - if wl.lnFd != nil { - _ = wl.lnFd.Close() - } -} - -func (wl *wakeListener) close() { - wl.closeListener() - if wl.reuse != nil { - _ = wl.reuse.Close() - } -} - type Activator struct { - ports []uint16 - mu sync.Mutex - wakeListeners map[listenerKey]*wakeListener - appListeners map[listenerKey]*appListener - wakeInodes []uint64 - restoreHook activator.RestoreHook - log *log.Entry - ns ns.NetNS - started atomic.Bool - sockOptLink link.Link - cgroupsPath string - sandboxPid int + ports []uint16 + mu sync.Mutex + wakeListeners map[listenerKey]*wakeListener + probeListeners map[listenerKey]*probeListener + appListeners map[listenerKey]*appListener + wakeInodes []uint64 + restoreHook activator.RestoreHook + log *log.Entry + ns ns.NetNS + started atomic.Bool + sockOptLink link.Link + sockoptObjects *sockoptObjects + trackerLink link.Link + trackerObjs *trackerObjects + cgroupsPath string + sandboxPid int } const ( @@ -108,10 +76,6 @@ func (act *Activator) LoadBPF() error { if err := rlimit.RemoveMemlock(); err != nil { return err } - sockoptObjs := &sockoptObjects{} - if err := loadSockoptObjects(sockoptObjs, nil); err != nil { - return fmt.Errorf("loading sockopt objects: %w", err) - } path, err := cgroup2.PidGroupPath(act.sandboxPid) if err != nil { @@ -120,7 +84,13 @@ func (act *Activator) LoadBPF() error { // use filepath.Dir to get parent cgroup of the cri-container hostCgroupPath := filepath.Join("/sys/fs/cgroup", filepath.Dir(path)) act.log.Debugf("attaching setsockopt to cgroup %s", hostCgroupPath) - l, err := link.AttachCgroup(link.CgroupOptions{ + + sockoptObjs := &sockoptObjects{} + if err := loadSockoptObjects(sockoptObjs, nil); err != nil { + return fmt.Errorf("loading sockopt objects: %w", err) + } + act.sockoptObjects = sockoptObjs + sockOptLink, err := link.AttachCgroup(link.CgroupOptions{ Path: hostCgroupPath, Attach: ebpf.AttachCGroupSetsockopt, Program: sockoptObjs.Setsockopt, @@ -128,7 +98,23 @@ func (act *Activator) LoadBPF() error { if err != nil { return err } - act.sockOptLink = l + act.sockOptLink = sockOptLink + + trackerObjs := &trackerObjects{} + if err := loadTrackerObjects(trackerObjs, nil); err != nil { + return fmt.Errorf("loading sockopt objects: %w", err) + } + act.trackerObjs = trackerObjs + + trackerLink, err := link.AttachCgroup(link.CgroupOptions{ + Path: hostCgroupPath, + Attach: ebpf.AttachCGroupInetIngress, + Program: trackerObjs.TrackIngress, + }) + if err != nil { + return err + } + act.trackerLink = trackerLink return nil } @@ -158,7 +144,7 @@ func (act *Activator) Start(ctx context.Context, connHook activator.ConnHook, re act.log.Infof("registered listeners in %s", time.Since(before)) act.started.Store(true) - return nil + return act.initActivityTracker() } func (act *Activator) Started() bool { @@ -171,64 +157,52 @@ func (act *Activator) Stop() error { for _, wl := range act.wakeListeners { wl.close() } + if act.sockoptObjects != nil { + act.sockoptObjects.Close() + } if act.sockOptLink != nil { act.sockOptLink.Close() } + if act.trackerObjs != nil { + act.trackerObjs.Close() + } + if act.trackerLink != nil { + act.trackerLink.Close() + } return nil } func (act *Activator) LastActivity(port uint16) (time.Time, error) { - // TODO: implement - return time.Time{}, nil -} - -var ErrListenersNotFound = errors.New("listeners not found") - -func (act *Activator) registerListeners(pid int) error { - act.mu.Lock() - defer act.mu.Unlock() + if !act.Started() { + return time.Time{}, nil + } - before := time.Now() - listeners, err := act.listenerFds(pid, len(act.ports)) - if err != nil { - return err + // the old activator used uint16 so we just convert it first + puint32 := uint32(port) + var val uint64 + if err := act.trackerObjs.SocketTracker.Lookup(&puint32, &val); err != nil { + return time.Time{}, fmt.Errorf("looking up %d: %w", port, err) } - if len(listeners) < len(act.ports) { - return fmt.Errorf("%w: expected at least %d listeners, found %d", ErrListenersNotFound, len(act.ports), len(listeners)) + + if val == 0 { + return time.Time{}, activator.NoActivityRecordedErr{} } - act.log.Infof("getting listeners in %s", time.Since(before)) - for _, l := range listeners { - if l.fd == nil { - continue - } - defer l.fd.Close() - act.log.Infof("registering ln %d port %d family %d ino %d", l.fd.Fd(), l.port, l.family, l.inode) - objs := &reuseportObjects{} - if err := loadReuseportObjects(objs, &ebpf.CollectionOptions{}); err != nil { - return fmt.Errorf("loading reuseport objects: %w", err) - } - if err := act.registerLn(l.fd, objs.Listeners, objs.SelectOrMigrate); err != nil { - return fmt.Errorf("registering listener: %w", err) - } - net := networkTCP4 - if l.family == unix.AF_INET6 { - net = networkTCP6ONLY - } - key := listenerKey{port: l.port, network: net} - if _, ok := act.wakeListeners[key]; !ok { - act.wakeListeners[key] = &wakeListener{reuse: objs} + return activator.ConvertBPFTime(val) +} + +func (act *Activator) initActivityTracker() error { + for _, port := range act.ports { + val := uint64(0) + puint32 := uint32(port) + if err := act.trackerObjs.SocketTracker.Put(&puint32, &val); err != nil { + return fmt.Errorf("unable to init activity tracker for port %d: %w", port, err) } - act.log.Infof("caching port %d fd %d", l.port, l.origFd) - act.appListeners[key] = &appListener{fd: l.origFd} - } - if len(listeners) == 0 { - return errNoListeningSockets } return nil } -func (act *Activator) wake(port uint16, network network) error { +func (act *Activator) wake(network network) error { if act.restoreHook != nil { pid, err := act.restoreHook() if err != nil { @@ -282,7 +256,7 @@ func (act *Activator) ScaleDown() error { act.wakeInodes = []uint64{} for k := range act.wakeListeners { act.log.Infof("spawning wake listener: %v", k) - if err := act.listen(k.port, k.network, act.wakeListeners[k]); err != nil { + if err := act.listenWake(k.port, k.network, act.wakeListeners[k]); err != nil { return err } } @@ -290,368 +264,3 @@ func (act *Activator) ScaleDown() error { act.log.Infof("wakeListeners: %d: %v", len(act.wakeListeners), act.wakeListeners) return nil } - -func (act *Activator) listen(port uint16, network network, wl *wakeListener) error { - if err := act.ns.Do(func(nn ns.NetNS) error { - ln, err := listenReuseport(port, network) - if err != nil { - return fmt.Errorf("wake listener: %w", err) - } - wl.ln = ln - return nil - }); err != nil { - return err - } - f, err := wl.ln.File() - if err != nil { - wl.ln.Close() - return err - } - wl.lnFd = f - var stat syscall.Stat_t - if err := syscall.Fstat(int(f.Fd()), &stat); err != nil { - return err - } - act.wakeInodes = append(act.wakeInodes, stat.Ino) - if err := unix.SetsockoptInt(int(wl.lnFd.Fd()), unix.SOL_SOCKET, - unix.SO_ATTACH_REUSEPORT_EBPF, wl.reuse.SelectOrMigrate.FD()); err != nil { - return fmt.Errorf("attach reuseport prog: %w", err) - } - key := uint32(wakeKey) - if err := wl.reuse.Listeners.Update(&key, uint64(wl.lnFd.Fd()), ebpf.UpdateAny); err != nil { - wl.lnFd.Close() - wl.ln.Close() - act.log.WithError(err).Error("inserting wake listener") - return fmt.Errorf("inserting wake listener: %w", err) - } - go act.watchWake(wl.lnFd, port, network) - return nil -} - -// watchWake polls the wake listener without ever accepting and calls wake as -// soon as the poll returns something. -func (act *Activator) watchWake(f *os.File, port uint16, network network) { - epfd, err := unix.EpollCreate1(unix.EPOLL_CLOEXEC) - if err != nil { - act.log.WithError(err).Error("epoll create") - return - } - defer func() { - _ = unix.EpollCtl(epfd, unix.EPOLL_CTL_DEL, int(f.Fd()), nil) - _ = unix.Close(epfd) - }() - event := unix.EpollEvent{ - Events: unix.EPOLLIN, - Fd: int32(f.Fd()), - } - if err := unix.EpollCtl(epfd, unix.EPOLL_CTL_ADD, int(f.Fd()), &event); err != nil { - act.log.WithError(err).Error("failed to register socket with epoll") - return - } - events := make([]unix.EpollEvent, 10) - for { - n, err := unix.EpollWait(epfd, events, -1) - if err != nil { - if err == unix.EINTR { - continue - } - act.log.WithError(err).Error("epoll wait failed") - } - - for i := range n { - if int(events[i].Fd) != int(f.Fd()) { - continue - } - act.log.Info("socket activity detected, waking up") - if err := act.wake(port, network); err != nil { - act.log.WithError(err).Error("wake") - } - - return - } - } -} - -// registerLn attaches select_or_migrate to the listerners reuseport group and -// puts it into slot 0. The caller closes its dup of the fd afterwards and the -// sockarray holds the socket via the listeners own fd. -func (act *Activator) registerLn(lnFd *os.File, bpfMap *ebpf.Map, prog *ebpf.Program) error { - if err := unix.SetsockoptInt(int(lnFd.Fd()), unix.SOL_SOCKET, - unix.SO_ATTACH_REUSEPORT_EBPF, prog.FD()); err != nil { - return fmt.Errorf("attach reuseport prog: %w", err) - } - key := uint32(appKey) - if err := bpfMap.Update(&key, uint64(lnFd.Fd()), ebpf.UpdateAny); err != nil { - return fmt.Errorf("sockarray app: %w", err) - } - return nil -} - -// listenReuseport opens a TCP listener with SO_REUSEPORT -func listenReuseport(port uint16, network network) (*net.TCPListener, error) { - lc := net.ListenConfig{ - Control: func(_, _ string, c syscall.RawConn) error { - var serr error - if err := c.Control(func(fd uintptr) { - serr = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1) - if serr != nil { - return - } - if network == networkTCP6ONLY { - serr = unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_V6ONLY, 0) - } - }); err != nil { - return err - } - return serr - }, - } - lc.SetMultipathTCP(false) - n := string(network) - if network == networkTCP6ONLY { - n = string(networkTCP6) - } - ln, err := lc.Listen(context.Background(), n, fmt.Sprintf(":%d", port)) - if err != nil { - return nil, err - } - return ln.(*net.TCPListener), nil -} - -type listener struct { - port uint16 - family uint8 - inode uint32 - origFd int - fd *os.File -} - -var errNoListeningSockets = errors.New("no listening sockets found") - -func (act *Activator) listenerFdsFromCache(pid int) ([]listener, error) { - cache := act.appListeners - if len(cache) == 0 { - return nil, nil - } - - listeners := []listener{} - pids, err := containerPids(pid) - if err != nil { - return nil, err - } - for _, cpid := range pids { - // bail out early as we found all listeners - if len(listeners) == len(cache) { - break - } - - pidfd, err := unix.PidfdOpen(cpid, 0) - if err != nil { - continue - } - defer unix.Close(pidfd) - - for k, v := range cache { - fd, err := unix.PidfdGetfd(pidfd, v.fd, 0) - if err != nil { - continue - } - var stat unix.Stat_t - if err := unix.Fstat(int(fd), &stat); err != nil { - return nil, err - } - - sockaddr, err := unix.Getsockname(fd) - if err != nil { - continue - } - - var port int - switch sa := sockaddr.(type) { - case *unix.SockaddrInet4: - port = sa.Port - case *unix.SockaddrInet6: - port = sa.Port - } - if k.port != uint16(port) { - continue - } - - family := uint8(unix.AF_INET) - if k.network == networkTCP6 || k.network == networkTCP6ONLY { - family = unix.AF_INET6 - } - listeners = append(listeners, listener{ - port: k.port, - family: family, - fd: os.NewFile(uintptr(fd), ""), - origFd: v.fd, - inode: uint32(stat.Ino), - }) - } - } - return listeners, nil -} - -func containerPids(pid int) ([]int, error) { - rootProc, err := procfs.NewProc(pid) - if err != nil { - return nil, err - } - rootNs, err := rootProc.Namespaces() - if err != nil { - return nil, err - } - pidNSInode := rootNs["pid"].Inode - - pfs, err := procfs.NewDefaultFS() - if err != nil { - return nil, err - } - procs, err := pfs.AllProcs() - if err != nil { - return nil, err - } - - containerProcs := []int{} - for _, proc := range procs { - target, err := os.Readlink(filepath.Join(procfs.DefaultMountPoint, strconv.Itoa(proc.PID), "ns", "pid")) - if err != nil { - continue - } - - fields := strings.SplitN(target, ":", 2) - if len(fields) != 2 { - continue - } - - inode, err := strconv.ParseUint(strings.Trim(fields[1], "[]"), 10, 32) - if err != nil { - continue - } - - if uint32(inode) != pidNSInode { - continue - } - containerProcs = append(containerProcs, proc.PID) - } - return containerProcs, nil -} - -func (act *Activator) listenerFds(pid int, minListeners int) ([]listener, error) { - l, err := act.listenerFdsFromCache(pid) - if err == nil && len(l) >= minListeners { - return l, nil - } - listeners, err := act.getListeningInodes(pid) - if err != nil { - return nil, err - } - - pids, err := containerPids(pid) - if err != nil { - return nil, err - } - - listenersWithFd := []listener{} - inos := map[uint32]struct{}{} - for _, cpid := range pids { - for _, listener := range listeners { - if _, ok := inos[listener.inode]; ok { - continue - } - if slices.Contains(act.wakeInodes, uint64(listener.inode)) { - continue - } - target, err := socketFdNum(cpid, []uint32{listener.inode}) - if err != nil { - continue - } - pidfd, err := unix.PidfdOpen(cpid, 0) - if err != nil { - continue - } - defer unix.Close(pidfd) - - fd, err := unix.PidfdGetfd(pidfd, target, 0) - if err != nil { - continue - } - listener.fd = os.NewFile(uintptr(fd), "") - listener.origFd = target - listenersWithFd = append(listenersWithFd, listener) - inos[listener.inode] = struct{}{} - } - } - return listenersWithFd, nil -} - -func (act *Activator) getListeningInodes(pid int) ([]listener, error) { - fs, err := procfs.NewFS("/proc/" + strconv.Itoa(pid)) - if err != nil { - return nil, err - } - - netTCP4, err := fs.NetTCP() - if err != nil { - return nil, err - } - netTCP6, err := fs.NetTCP6() - if err != nil { - return nil, err - } - - listeners := []listener{} - const TCP_LISTEN = 10 - for _, sock := range netTCP4 { - if sock.St == TCP_LISTEN { - if slices.Contains(act.wakeInodes, uint64(sock.Inode)) { - continue - } - listeners = append(listeners, listener{ - port: uint16(sock.LocalPort), - family: unix.AF_INET, - inode: uint32(sock.Inode), - }) - } - } - for _, sock := range netTCP6 { - if sock.St == TCP_LISTEN { - if slices.Contains(act.wakeInodes, uint64(sock.Inode)) { - continue - } - listeners = append(listeners, listener{ - port: uint16(sock.LocalPort), - family: unix.AF_INET6, - inode: uint32(sock.Inode), - }) - } - } - - if len(listeners) == 0 { - return nil, errNoListeningSockets - } - return listeners, nil -} - -// socketFdNum scans /proc//fd for the fd number backing any of the -// socket inodes. -func socketFdNum(pid int, inodes []uint32) (int, error) { - dir := fmt.Sprintf("/proc/%d/fd", pid) - ents, err := os.ReadDir(dir) - if err != nil { - return 0, err - } - want := make(map[string]bool, len(inodes)) - for _, ino := range inodes { - want[fmt.Sprintf("socket:[%d]", ino)] = true - } - for _, e := range ents { - link, err := os.Readlink(filepath.Join(dir, e.Name())) - if err != nil || !want[link] { - continue - } - return strconv.Atoi(e.Name()) - } - return 0, fmt.Errorf("no fd for socket inodes %v", inodes) -} diff --git a/activator/reuse/listener.go b/activator/reuse/listener.go new file mode 100644 index 0000000..0aa3112 --- /dev/null +++ b/activator/reuse/listener.go @@ -0,0 +1,463 @@ +package reuse + +import ( + "context" + "errors" + "fmt" + "net" + "os" + "path/filepath" + "slices" + "strconv" + "strings" + "syscall" + "time" + + "github.com/cilium/ebpf" + "github.com/containernetworking/plugins/pkg/ns" + "github.com/prometheus/procfs" + "golang.org/x/sys/unix" +) + +type wakeListener struct { + ln *net.TCPListener + lnFd *os.File + reuse *reuseportObjects +} + +type appListener struct { + fd int +} + +type listenerKey struct { + port uint16 + network network +} + +type listener struct { + port uint16 + family uint8 + inode uint32 + origFd int + fd *os.File +} + +var ErrNoListeningSockets = errors.New("no listening sockets found") + +func (wl *wakeListener) closeListener() { + if wl.ln != nil { + _ = wl.ln.Close() + } + if wl.lnFd != nil { + _ = wl.lnFd.Close() + } +} + +func (wl *wakeListener) close() { + wl.closeListener() + if wl.reuse != nil { + _ = wl.reuse.Close() + } +} + +func (act *Activator) listenWake(port uint16, network network, wl *wakeListener) error { + if err := act.ns.Do(func(nn ns.NetNS) error { + ln, err := listenReuseport(port, network) + if err != nil { + return fmt.Errorf("wake listener: %w", err) + } + wl.ln = ln + return nil + }); err != nil { + return err + } + f, err := wl.ln.File() + if err != nil { + wl.ln.Close() + return err + } + wl.lnFd = f + var stat syscall.Stat_t + if err := syscall.Fstat(int(f.Fd()), &stat); err != nil { + return err + } + act.wakeInodes = append(act.wakeInodes, stat.Ino) + if err := unix.SetsockoptInt(int(wl.lnFd.Fd()), unix.SOL_SOCKET, + unix.SO_ATTACH_REUSEPORT_EBPF, wl.reuse.SelectOrMigrate.FD()); err != nil { + return fmt.Errorf("attach reuseport prog: %w", err) + } + key := uint32(wakeKey) + if err := wl.reuse.Listeners.Update(&key, uint64(wl.lnFd.Fd()), ebpf.UpdateAny); err != nil { + wl.lnFd.Close() + wl.ln.Close() + act.log.WithError(err).Error("inserting wake listener") + return fmt.Errorf("inserting wake listener: %w", err) + } + go act.watchWake(wl.lnFd, network) + return nil +} + +// watchWake polls the wake listener without ever accepting and calls wake as +// soon as the poll returns something. +func (act *Activator) watchWake(f *os.File, network network) { + epfd, err := unix.EpollCreate1(unix.EPOLL_CLOEXEC) + if err != nil { + act.log.WithError(err).Error("epoll create") + return + } + defer func() { + _ = unix.EpollCtl(epfd, unix.EPOLL_CTL_DEL, int(f.Fd()), nil) + _ = unix.Close(epfd) + }() + event := unix.EpollEvent{ + Events: unix.EPOLLIN, + Fd: int32(f.Fd()), + } + if err := unix.EpollCtl(epfd, unix.EPOLL_CTL_ADD, int(f.Fd()), &event); err != nil { + act.log.WithError(err).Error("failed to register socket with epoll") + return + } + events := make([]unix.EpollEvent, 10) + for { + n, err := unix.EpollWait(epfd, events, -1) + if err != nil { + if err == unix.EINTR { + continue + } + act.log.WithError(err).Error("epoll wait failed") + } + + for i := range n { + if int(events[i].Fd) != int(f.Fd()) { + continue + } + act.log.Info("socket activity detected, waking up") + if err := act.wake(network); err != nil { + act.log.WithError(err).Error("wake") + } + + return + } + } +} + +func (act *Activator) registerListeners(pid int) error { + act.mu.Lock() + defer act.mu.Unlock() + + before := time.Now() + listeners, err := act.listenerFds(pid, len(act.ports)) + if err != nil { + return err + } + if len(listeners) < len(act.ports) { + return fmt.Errorf("%w: expected at least %d listeners, found %d", ErrNoListeningSockets, len(act.ports), len(listeners)) + } + act.log.Infof("getting listeners in %s", time.Since(before)) + + for _, l := range listeners { + if l.fd == nil { + continue + } + defer l.fd.Close() + act.log.Infof("registering ln %d port %d family %d ino %d", l.fd.Fd(), l.port, l.family, l.inode) + objs := &reuseportObjects{} + if err := loadReuseportObjects(objs, &ebpf.CollectionOptions{}); err != nil { + return fmt.Errorf("loading reuseport objects: %w", err) + } + if err := act.registerLn(l.fd, objs.Listeners, objs.SelectOrMigrate); err != nil { + return fmt.Errorf("registering listener: %w", err) + } + net := networkTCP4 + if l.family == unix.AF_INET6 { + net = networkTCP6ONLY + } + key := listenerKey{port: l.port, network: net} + wl, ok := act.wakeListeners[key] + if !ok { + act.wakeListeners[key] = &wakeListener{reuse: objs} + } else { + wl.reuse = objs + } + act.log.Infof("caching port %d fd %d", l.port, l.origFd) + act.appListeners[key] = &appListener{fd: l.origFd} + } + if len(listeners) == 0 { + return ErrNoListeningSockets + } + return nil +} + +func (act *Activator) listenerFds(pid int, minListeners int) ([]listener, error) { + l, err := act.listenerFdsFromCache(pid) + if err == nil && len(l) >= minListeners { + return l, nil + } + listeners, err := act.getListeningInodes(pid) + if err != nil { + return nil, err + } + + pids, err := containerPids(pid) + if err != nil { + return nil, err + } + + listenersWithFd := []listener{} + inos := map[uint32]struct{}{} + for _, cpid := range pids { + for _, listener := range listeners { + if _, ok := inos[listener.inode]; ok { + continue + } + if slices.Contains(act.wakeInodes, uint64(listener.inode)) { + continue + } + target, err := socketFdNum(cpid, []uint32{listener.inode}) + if err != nil { + continue + } + pidfd, err := unix.PidfdOpen(cpid, 0) + if err != nil { + continue + } + defer unix.Close(pidfd) + + fd, err := unix.PidfdGetfd(pidfd, target, 0) + if err != nil { + continue + } + listener.fd = os.NewFile(uintptr(fd), "") + listener.origFd = target + listenersWithFd = append(listenersWithFd, listener) + inos[listener.inode] = struct{}{} + } + } + return listenersWithFd, nil +} + +// registerLn attaches select_or_migrate to the listerners reuseport group and +// puts it into slot 0. The caller closes its dup of the fd afterwards and the +// sockarray holds the socket via the listeners own fd. +func (act *Activator) registerLn(lnFd *os.File, bpfMap *ebpf.Map, prog *ebpf.Program) error { + if err := unix.SetsockoptInt(int(lnFd.Fd()), unix.SOL_SOCKET, + unix.SO_ATTACH_REUSEPORT_EBPF, prog.FD()); err != nil { + return fmt.Errorf("attach reuseport prog: %w", err) + } + key := uint32(appKey) + if err := bpfMap.Update(&key, uint64(lnFd.Fd()), ebpf.UpdateAny); err != nil { + return fmt.Errorf("sockarray app: %w", err) + } + return nil +} + +// listenReuseport opens a TCP listener with SO_REUSEPORT +func listenReuseport(port uint16, network network) (*net.TCPListener, error) { + lc := net.ListenConfig{ + Control: func(_, _ string, c syscall.RawConn) error { + var serr error + if err := c.Control(func(fd uintptr) { + serr = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1) + if serr != nil { + return + } + if network == networkTCP6ONLY { + serr = unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_V6ONLY, 0) + } + }); err != nil { + return err + } + return serr + }, + } + lc.SetMultipathTCP(false) + n := string(network) + if network == networkTCP6ONLY { + n = string(networkTCP6) + } + ln, err := lc.Listen(context.Background(), n, fmt.Sprintf(":%d", port)) + if err != nil { + return nil, err + } + return ln.(*net.TCPListener), nil +} + +func (act *Activator) listenerFdsFromCache(pid int) ([]listener, error) { + cache := act.appListeners + if len(cache) == 0 { + return nil, nil + } + + listeners := []listener{} + pids, err := containerPids(pid) + if err != nil { + return nil, err + } + for _, cpid := range pids { + // bail out early as we found all listeners + if len(listeners) == len(cache) { + break + } + + pidfd, err := unix.PidfdOpen(cpid, 0) + if err != nil { + continue + } + defer unix.Close(pidfd) + + for k, v := range cache { + fd, err := unix.PidfdGetfd(pidfd, v.fd, 0) + if err != nil { + continue + } + var stat unix.Stat_t + if err := unix.Fstat(int(fd), &stat); err != nil { + return nil, err + } + + sockaddr, err := unix.Getsockname(fd) + if err != nil { + continue + } + + var port int + switch sa := sockaddr.(type) { + case *unix.SockaddrInet4: + port = sa.Port + case *unix.SockaddrInet6: + port = sa.Port + } + if k.port != uint16(port) { + continue + } + + family := uint8(unix.AF_INET) + if k.network == networkTCP6 || k.network == networkTCP6ONLY { + family = unix.AF_INET6 + } + listeners = append(listeners, listener{ + port: k.port, + family: family, + fd: os.NewFile(uintptr(fd), ""), + origFd: v.fd, + inode: uint32(stat.Ino), + }) + } + } + return listeners, nil +} + +func containerPids(pid int) ([]int, error) { + rootProc, err := procfs.NewProc(pid) + if err != nil { + return nil, err + } + rootNs, err := rootProc.Namespaces() + if err != nil { + return nil, err + } + pidNSInode := rootNs["pid"].Inode + + pfs, err := procfs.NewDefaultFS() + if err != nil { + return nil, err + } + procs, err := pfs.AllProcs() + if err != nil { + return nil, err + } + + containerProcs := []int{} + for _, proc := range procs { + target, err := os.Readlink(filepath.Join(procfs.DefaultMountPoint, strconv.Itoa(proc.PID), "ns", "pid")) + if err != nil { + continue + } + + fields := strings.SplitN(target, ":", 2) + if len(fields) != 2 { + continue + } + + inode, err := strconv.ParseUint(strings.Trim(fields[1], "[]"), 10, 32) + if err != nil { + continue + } + + if uint32(inode) != pidNSInode { + continue + } + containerProcs = append(containerProcs, proc.PID) + } + return containerProcs, nil +} + +func (act *Activator) getListeningInodes(pid int) ([]listener, error) { + fs, err := procfs.NewFS("/proc/" + strconv.Itoa(pid)) + if err != nil { + return nil, err + } + + netTCP4, err := fs.NetTCP() + if err != nil { + return nil, err + } + netTCP6, err := fs.NetTCP6() + if err != nil { + return nil, err + } + + listeners := []listener{} + const tcpListen = 10 + for _, sock := range netTCP4 { + if sock.St == tcpListen { + if slices.Contains(act.wakeInodes, uint64(sock.Inode)) { + continue + } + listeners = append(listeners, listener{ + port: uint16(sock.LocalPort), + family: unix.AF_INET, + inode: uint32(sock.Inode), + }) + } + } + for _, sock := range netTCP6 { + if sock.St == tcpListen { + if slices.Contains(act.wakeInodes, uint64(sock.Inode)) { + continue + } + listeners = append(listeners, listener{ + port: uint16(sock.LocalPort), + family: unix.AF_INET6, + inode: uint32(sock.Inode), + }) + } + } + + if len(listeners) == 0 { + return nil, ErrNoListeningSockets + } + return listeners, nil +} + +// socketFdNum scans /proc//fd for the fd number backing any of the +// socket inodes. +func socketFdNum(pid int, inodes []uint32) (int, error) { + dir := fmt.Sprintf("/proc/%d/fd", pid) + ents, err := os.ReadDir(dir) + if err != nil { + return 0, err + } + want := make(map[string]bool, len(inodes)) + for _, ino := range inodes { + want[fmt.Sprintf("socket:[%d]", ino)] = true + } + for _, e := range ents { + link, err := os.Readlink(filepath.Join(dir, e.Name())) + if err != nil || !want[link] { + continue + } + return strconv.Atoi(e.Name()) + } + return 0, fmt.Errorf("no fd for socket inodes %v", inodes) +} diff --git a/activator/reuse/probe.go b/activator/reuse/probe.go new file mode 100644 index 0000000..3687beb --- /dev/null +++ b/activator/reuse/probe.go @@ -0,0 +1,28 @@ +package reuse + +import ( + "fmt" + "net" + "os" + + "github.com/containernetworking/plugins/pkg/ns" +) + +type probeListener struct { + ln *net.TCPListener + lnFd *os.File +} + +func (act *Activator) listenProbe(port uint16, network network, pl *probeListener) error { + if err := act.ns.Do(func(nn ns.NetNS) error { + ln, err := listenReuseport(port, network) + if err != nil { + return fmt.Errorf("wake listener: %w", err) + } + pl.ln = ln + return nil + }); err != nil { + return err + } + return nil +} diff --git a/activator/reuse/reuseport_bpfeb.o b/activator/reuse/reuseport_bpfeb.o index f936d59aa4cb5c025b61b1c8dc2a86d3f673f319..adfba7d3979aa2add4a58675a8a7d826ac6d80b9 100644 GIT binary patch delta 164 zcmbOsIYV;8A-4Jy1|Sds;`a;;jQR`=Iov?D0+jE>z)%3<8$kJC3=Ab8z6X?_&A?E@ z1!NZ>@i~F)4k&*a149c)eghI8B!2?Rf5afn&;wM!2;_qtz$DMWFo$t+BB#RU5_T0< E0BC#~g8%>k delta 164 zcmbOsIYV;8A-4Jj3_u_N#P1mx81)$#R&WE^3Q)ci1H&2+-vG)FV_?_-;(I{(*$fPS zxPa^eBt9pQ-2vqHlOz~BMpX9M|M zH4F?uC1Cv^J|~dh0p%|P$+s{tY(V030{JJP{6|1}A+8=E56A#HK%NQ6oHIF*Q)zPv Hy9z4+Z#5c& delta 164 zcmbOsIYV;8LALq@3=9Gc3=HpqSf7!BfqMl5g94QA1mdq@U@(C4!$ABE3=AGnem0QL z^@o9>0Ey2D%%Rurhj0`|6VDmwIP9XmTl>Z3G7v|ytl0XD Date: Sun, 19 Jul 2026 16:34:03 +0200 Subject: [PATCH 04/17] feat: activity tracker ignores localhost --- activator/reuse/activator.go | 169 ++++++++++++++++++++++++++--- activator/reuse/listener.go | 147 ++++++++++++++++--------- activator/reuse/probe.go | 59 +++++++++- activator/reuse/reuseport.c | 57 +++++++++- activator/reuse/reuseport_bpfeb.go | 2 + activator/reuse/reuseport_bpfeb.o | Bin 3224 -> 6120 bytes activator/reuse/reuseport_bpfel.go | 2 + activator/reuse/reuseport_bpfel.o | Bin 3224 -> 6120 bytes activator/reuse/tracker.c | 68 +++++++++++- activator/reuse/tracker_bpfeb.go | 10 ++ activator/reuse/tracker_bpfeb.o | Bin 3408 -> 5624 bytes activator/reuse/tracker_bpfel.go | 10 ++ activator/reuse/tracker_bpfel.o | Bin 3408 -> 5632 bytes api/shim/v1/config.go | 31 +++++- shim/container.go | 49 ++++++++- shim/restore.go | 3 + 16 files changed, 515 insertions(+), 92 deletions(-) diff --git a/activator/reuse/activator.go b/activator/reuse/activator.go index a538591..33c4d72 100644 --- a/activator/reuse/activator.go +++ b/activator/reuse/activator.go @@ -4,6 +4,7 @@ import ( "context" "fmt" "net" + "net/netip" "path/filepath" "strconv" "strings" @@ -33,13 +34,13 @@ const ( ) type Activator struct { + *Config ports []uint16 mu sync.Mutex wakeListeners map[listenerKey]*wakeListener probeListeners map[listenerKey]*probeListener appListeners map[listenerKey]*appListener wakeInodes []uint64 - restoreHook activator.RestoreHook log *log.Entry ns ns.NetNS started atomic.Bool @@ -57,14 +58,20 @@ const ( probeKey = 2 ) -func New(ctx context.Context, ns ns.NetNS, cgroupsPath string) (*Activator, error) { +func New(ctx context.Context, ns ns.NetNS, cgroupsPath string, opts ...Option) (*Activator, error) { + cfg := &Config{} + for _, opt := range opts { + opt(cfg) + } act := &Activator{ - ns: ns, - cgroupsPath: cgroupsPath, - log: log.GetLogger(ctx), - sandboxPid: parsePidFromNetNS(ns), - wakeListeners: make(map[listenerKey]*wakeListener), - appListeners: make(map[listenerKey]*appListener), + ns: ns, + cgroupsPath: cgroupsPath, + log: log.GetLogger(ctx), + sandboxPid: parsePidFromNetNS(ns), + wakeListeners: make(map[listenerKey]*wakeListener), + appListeners: make(map[listenerKey]*appListener), + probeListeners: make(map[listenerKey]*probeListener), + Config: cfg, } if err := act.LoadBPF(); err != nil { return nil, fmt.Errorf("loading ebpf: %w", err) @@ -132,19 +139,44 @@ func parsePidFromNetNS(nn ns.NetNS) int { return pid } -func (act *Activator) Start(ctx context.Context, connHook activator.ConnHook, restoreHook activator.RestoreHook, pid int, ports ...uint16) error { +type Config struct { + trackerIgnoreLocalhost bool + probeAddr *netip.Addr + restoreHook activator.RestoreHook +} + +type Option func(cfg *Config) + +func TrackerIgnoreLocalhost(ignore bool) Option { + return func(cfg *Config) { + cfg.trackerIgnoreLocalhost = ignore + } +} + +func RestoreHook(restoreHook activator.RestoreHook) Option { + return func(cfg *Config) { + cfg.restoreHook = restoreHook + } +} + +func ProbeAddr(addr *netip.Addr) Option { + return func(cfg *Config) { + cfg.probeAddr = addr + } +} + +func (act *Activator) Start(ctx context.Context, pid int, ports []uint16) error { act.ports = ports - act.restoreHook = restoreHook before := time.Now() if err := act.registerListeners(pid); err != nil { act.log.WithError(err).Error("registering listeners") return err } - act.log.Infof("registered listeners in %s", time.Since(before)) + act.log.Debugf("registered listeners in %s", time.Since(before)) act.started.Store(true) - return act.initActivityTracker() + return act.initSocketTracker() } func (act *Activator) Started() bool { @@ -157,6 +189,9 @@ func (act *Activator) Stop() error { for _, wl := range act.wakeListeners { wl.close() } + for _, pl := range act.probeListeners { + pl.close() + } if act.sockoptObjects != nil { act.sockoptObjects.Close() } @@ -191,7 +226,26 @@ func (act *Activator) LastActivity(port uint16) (time.Time, error) { return activator.ConvertBPFTime(val) } -func (act *Activator) initActivityTracker() error { +func (act *Activator) initSocketTracker() error { + if err := act.clearIgnoredAddrs(); err != nil { + return err + } + if err := act.clearSocketTracker(); err != nil { + return err + } + if act.trackerIgnoreLocalhost { + if err := IgnoreAddr(act.trackerObjs.IgnoredAddrs, "127.0.0.0/8"); err != nil { + return err + } + if err := IgnoreAddr(act.trackerObjs.IgnoredAddrs, "::1/128"); err != nil { + return err + } + } + if act.probeAddr != nil { + if err := IgnoreAddr(act.trackerObjs.IgnoredAddrs, act.probeAddr.String()); err != nil { + return err + } + } for _, port := range act.ports { val := uint64(0) puint32 := uint32(port) @@ -202,6 +256,78 @@ func (act *Activator) initActivityTracker() error { return nil } +func (act *Activator) Reload(opts ...Option) error { + cfg := &Config{} + for _, opt := range opts { + opt(cfg) + } + act.Config = cfg + if err := act.initSocketTracker(); err != nil { + return err + } + act.mu.Lock() + defer act.mu.Unlock() + for _, wl := range act.wakeListeners { + if err := wl.reuse.ProbeAddr.Set(act.probeAddrValue()); err != nil { + return err + } + } + return nil +} + +func (act *Activator) clearIgnoredAddrs() error { + var key trackerIpKey + var val byte + iter := act.trackerObjs.IgnoredAddrs.Iterate() + for iter.Next(&key, &val) { + if err := act.trackerObjs.IgnoredAddrs.Delete(key); err != nil { + return err + } + } + return iter.Err() +} + +func (act *Activator) clearSocketTracker() error { + var key uint32 + var val uint64 + iter := act.trackerObjs.SocketTracker.Iterate() + for iter.Next(&key, &val) { + if err := act.trackerObjs.SocketTracker.Delete(key); err != nil { + return err + } + } + return iter.Err() +} + +func IgnoreAddr(addrMap *ebpf.Map, ip string) error { + prefix, err := netip.ParsePrefix(ip) + if err != nil { + noPrefix, err := netip.ParseAddr(ip) + if err != nil { + return err + } + prefix, err = noPrefix.Prefix(noPrefix.BitLen()) + if err != nil { + return err + } + } + key := trackerIpKey{ + Prefixlen: uint32(prefix.Bits()), + } + + addr := prefix.Addr() + if addr.Is4() { + ip4 := addr.As4() + copy(key.Addr[:4], ip4[:]) + } else { + ip6 := addr.As16() + copy(key.Addr[:], ip6[:]) + } + + var value byte = 0 + return addrMap.Put(&key, value) +} + func (act *Activator) wake(network network) error { if act.restoreHook != nil { pid, err := act.restoreHook() @@ -214,13 +340,16 @@ func (act *Activator) wake(network network) error { act.log.WithError(err).Error("registering listeners") return err } - act.log.Infof("registered listeners in %s", time.Since(before)) + act.log.Debugf("registered listeners in %s", time.Since(before)) } act.mu.Lock() defer act.mu.Unlock() for _, wl := range act.wakeListeners { wl.closeListener() } + for _, pl := range act.probeListeners { + pl.closeListener() + } // sk_reuseport/migrate only seems to migrate pending connections to the // wake listener only when a new conn comes in. We call poke which just // dials and immediately closes to trigger the migration. @@ -253,14 +382,20 @@ func (act *Activator) ScaleDown() error { for _, wl := range act.wakeListeners { wl.closeListener() } + for _, pl := range act.probeListeners { + pl.closeListener() + } act.wakeInodes = []uint64{} for k := range act.wakeListeners { - act.log.Infof("spawning wake listener: %v", k) if err := act.listenWake(k.port, k.network, act.wakeListeners[k]); err != nil { return err } + pl := &probeListener{} + if err := act.listenProbe(k.port, k.network, act.wakeListeners[k], pl); err != nil { + return err + } + act.probeListeners[k] = pl } - act.log.Info("listening for new connections on wake listener") - act.log.Infof("wakeListeners: %d: %v", len(act.wakeListeners), act.wakeListeners) + act.log.Debugf("listening for new connections on %d wake listeners: %v", len(act.wakeListeners), act.wakeListeners) return nil } diff --git a/activator/reuse/listener.go b/activator/reuse/listener.go index 0aa3112..b48c55f 100644 --- a/activator/reuse/listener.go +++ b/activator/reuse/listener.go @@ -20,9 +20,10 @@ import ( ) type wakeListener struct { - ln *net.TCPListener - lnFd *os.File - reuse *reuseportObjects + ln *net.TCPListener + lnFd *os.File + reuse *reuseportObjects + epollFd int } type appListener struct { @@ -71,49 +72,41 @@ func (act *Activator) listenWake(port uint16, network network, wl *wakeListener) }); err != nil { return err } - f, err := wl.ln.File() - if err != nil { - wl.ln.Close() - return err - } - wl.lnFd = f - var stat syscall.Stat_t - if err := syscall.Fstat(int(f.Fd()), &stat); err != nil { + + var dupFd int + var dupErr error + if err := act.attachNetListener(wl.ln, wakeKey, wl.reuse.Listeners, wl.reuse.SelectOrMigrate, func(fd uintptr) { + dupFd, dupErr = syscall.Dup(int(fd)) + }); err != nil { return err } - act.wakeInodes = append(act.wakeInodes, stat.Ino) - if err := unix.SetsockoptInt(int(wl.lnFd.Fd()), unix.SOL_SOCKET, - unix.SO_ATTACH_REUSEPORT_EBPF, wl.reuse.SelectOrMigrate.FD()); err != nil { - return fmt.Errorf("attach reuseport prog: %w", err) + if dupErr != nil { + return dupErr } - key := uint32(wakeKey) - if err := wl.reuse.Listeners.Update(&key, uint64(wl.lnFd.Fd()), ebpf.UpdateAny); err != nil { - wl.lnFd.Close() - wl.ln.Close() - act.log.WithError(err).Error("inserting wake listener") - return fmt.Errorf("inserting wake listener: %w", err) + wl.lnFd = os.NewFile(uintptr(dupFd), "") + epfd, err := unix.EpollCreate1(unix.EPOLL_CLOEXEC) + if err != nil { + act.log.WithError(err).Error("epoll create") + return err } - go act.watchWake(wl.lnFd, network) + wl.epollFd = epfd + + go act.watchWake(epfd, wl.lnFd.Fd(), network) return nil } // watchWake polls the wake listener without ever accepting and calls wake as // soon as the poll returns something. -func (act *Activator) watchWake(f *os.File, network network) { - epfd, err := unix.EpollCreate1(unix.EPOLL_CLOEXEC) - if err != nil { - act.log.WithError(err).Error("epoll create") - return - } +func (act *Activator) watchWake(epfd int, fd uintptr, network network) { defer func() { - _ = unix.EpollCtl(epfd, unix.EPOLL_CTL_DEL, int(f.Fd()), nil) + _ = unix.EpollCtl(epfd, unix.EPOLL_CTL_DEL, int(fd), nil) _ = unix.Close(epfd) }() event := unix.EpollEvent{ Events: unix.EPOLLIN, - Fd: int32(f.Fd()), + Fd: int32(fd), } - if err := unix.EpollCtl(epfd, unix.EPOLL_CTL_ADD, int(f.Fd()), &event); err != nil { + if err := unix.EpollCtl(epfd, unix.EPOLL_CTL_ADD, int(fd), &event); err != nil { act.log.WithError(err).Error("failed to register socket with epoll") return } @@ -124,11 +117,13 @@ func (act *Activator) watchWake(f *os.File, network network) { if err == unix.EINTR { continue } + // TODO: figure out how to close this EpollWait act.log.WithError(err).Error("epoll wait failed") + break } for i := range n { - if int(events[i].Fd) != int(f.Fd()) { + if int(events[i].Fd) != int(fd) { continue } act.log.Info("socket activity detected, waking up") @@ -139,6 +134,7 @@ func (act *Activator) watchWake(f *os.File, network network) { return } } + act.log.Info("wake listener exited") } func (act *Activator) registerListeners(pid int) error { @@ -153,33 +149,37 @@ func (act *Activator) registerListeners(pid int) error { if len(listeners) < len(act.ports) { return fmt.Errorf("%w: expected at least %d listeners, found %d", ErrNoListeningSockets, len(act.ports), len(listeners)) } - act.log.Infof("getting listeners in %s", time.Since(before)) + act.log.Debugf("getting listeners in %s", time.Since(before)) for _, l := range listeners { if l.fd == nil { continue } defer l.fd.Close() - act.log.Infof("registering ln %d port %d family %d ino %d", l.fd.Fd(), l.port, l.family, l.inode) - objs := &reuseportObjects{} - if err := loadReuseportObjects(objs, &ebpf.CollectionOptions{}); err != nil { - return fmt.Errorf("loading reuseport objects: %w", err) - } - if err := act.registerLn(l.fd, objs.Listeners, objs.SelectOrMigrate); err != nil { - return fmt.Errorf("registering listener: %w", err) - } + net := networkTCP4 if l.family == unix.AF_INET6 { net = networkTCP6ONLY } key := listenerKey{port: l.port, network: net} - wl, ok := act.wakeListeners[key] - if !ok { + if _, ok := act.wakeListeners[key]; !ok { + objs := &reuseportObjects{} + if err := loadReuseportObjects(objs, &ebpf.CollectionOptions{}); err != nil { + return fmt.Errorf("loading reuseport objects: %w", err) + } + if act.probeAddr != nil { + if err := objs.ProbeAddr.Set(act.probeAddrValue()); err != nil { + return err + } + } act.wakeListeners[key] = &wakeListener{reuse: objs} - } else { - wl.reuse = objs } - act.log.Infof("caching port %d fd %d", l.port, l.origFd) + wl := act.wakeListeners[key] + act.log.Debugf("registering ln %d port %d family %d ino %d", l.fd.Fd(), l.port, l.family, l.inode) + if err := act.attachListener(appKey, l.fd.Fd(), wl.reuse.Listeners, wl.reuse.SelectOrMigrate); err != nil { + return fmt.Errorf("registering listener: %w", err) + } + act.log.Debugf("caching port %d fd %d", l.port, l.origFd) act.appListeners[key] = &appListener{fd: l.origFd} } if len(listeners) == 0 { @@ -188,6 +188,21 @@ func (act *Activator) registerListeners(pid int) error { return nil } +func (act *Activator) probeAddrValue() [16]byte { + if act.probeAddr == nil { + return [16]byte{} + } + var ebpfProbeAddr [16]byte + if act.probeAddr.Is4() { + a4 := act.probeAddr.As4() + copy(ebpfProbeAddr[:], a4[:]) + } else { + a16 := act.probeAddr.As16() + copy(ebpfProbeAddr[:], a16[:]) + } + return ebpfProbeAddr +} + func (act *Activator) listenerFds(pid int, minListeners int) ([]listener, error) { l, err := act.listenerFdsFromCache(pid) if err == nil && len(l) >= minListeners { @@ -236,21 +251,47 @@ func (act *Activator) listenerFds(pid int, minListeners int) ([]listener, error) return listenersWithFd, nil } -// registerLn attaches select_or_migrate to the listerners reuseport group and -// puts it into slot 0. The caller closes its dup of the fd afterwards and the -// sockarray holds the socket via the listeners own fd. -func (act *Activator) registerLn(lnFd *os.File, bpfMap *ebpf.Map, prog *ebpf.Program) error { - if err := unix.SetsockoptInt(int(lnFd.Fd()), unix.SOL_SOCKET, +// attachListener attaches select_or_migrate to the listeners reuseport group +// and puts it into the key slot. +func (act *Activator) attachListener(key uint32, lnFd uintptr, bpfMap *ebpf.Map, + prog *ebpf.Program) error { + if err := unix.SetsockoptInt(int(lnFd), unix.SOL_SOCKET, unix.SO_ATTACH_REUSEPORT_EBPF, prog.FD()); err != nil { return fmt.Errorf("attach reuseport prog: %w", err) } - key := uint32(appKey) - if err := bpfMap.Update(&key, uint64(lnFd.Fd()), ebpf.UpdateAny); err != nil { + if err := bpfMap.Update(&key, uint64(lnFd), ebpf.UpdateAny); err != nil { return fmt.Errorf("sockarray app: %w", err) } return nil } +// attachNetListener gets the fd of the [net.Listener] and then attaches it to +// the reuseport group into the key slot. +func (act *Activator) attachNetListener(ln net.Listener, key uint32, bpfMap *ebpf.Map, prog *ebpf.Program, fdfunc func(fd uintptr)) error { + sc, err := ln.(syscall.Conn).SyscallConn() + if err != nil { + ln.Close() + return err + } + var registerErr error + if err := sc.Control(func(fd uintptr) { + registerErr = act.attachListener(key, fd, bpfMap, prog) + if registerErr == nil { + if fdfunc != nil { + fdfunc(fd) + } + } + }); err != nil { + ln.Close() + return err + } + if registerErr != nil { + ln.Close() + return registerErr + } + return nil +} + // listenReuseport opens a TCP listener with SO_REUSEPORT func listenReuseport(port uint16, network network) (*net.TCPListener, error) { lc := net.ListenConfig{ diff --git a/activator/reuse/probe.go b/activator/reuse/probe.go index 3687beb..ac9d2bf 100644 --- a/activator/reuse/probe.go +++ b/activator/reuse/probe.go @@ -1,19 +1,19 @@ package reuse import ( + "errors" "fmt" "net" - "os" + "time" "github.com/containernetworking/plugins/pkg/ns" ) type probeListener struct { - ln *net.TCPListener - lnFd *os.File + ln net.Listener } -func (act *Activator) listenProbe(port uint16, network network, pl *probeListener) error { +func (act *Activator) listenProbe(port uint16, network network, wl *wakeListener, pl *probeListener) error { if err := act.ns.Do(func(nn ns.NetNS) error { ln, err := listenReuseport(port, network) if err != nil { @@ -24,5 +24,54 @@ func (act *Activator) listenProbe(port uint16, network network, pl *probeListene }); err != nil { return err } - return nil + go func() { + for { + conn, err := pl.ln.Accept() + if err != nil { + if errors.Is(err, net.ErrClosed) { + break + } + act.log.WithError(err).Error("accepting probe connection") + time.Sleep(time.Millisecond * 100) + continue + } + tcpConn, ok := conn.(*net.TCPConn) + if !ok { + act.log.Errorf("probe connection is not a *net.TCPConn: %T", conn) + _ = conn.Close() + continue + } + if err := handleProbe(tcpConn); err != nil { + act.log.WithError(err).Error("handling probe") + } + } + }() + return act.attachNetListener(pl.ln, probeKey, wl.reuse.Listeners, wl.reuse.SelectOrMigrate, nil) +} + +// handleProbe writes an HTTP response to conn that satisfies the kubelet and +// immediately closes the connection. It writes a raw http response to avoid +// importing net/http which inflates the shim. +func handleProbe(conn *net.TCPConn) error { + _, err := conn.Write([]byte("HTTP/1.1 200 OK\r\nServer: zeropod probe\r\nConnection: close\r\n\r\nok\n")) + if err != nil { + return fmt.Errorf("writing probe response: %w", err) + } + if err := conn.CloseWrite(); err != nil { + return fmt.Errorf("closing write probe connection: %w", err) + } + if err := conn.Close(); err != nil { + return fmt.Errorf("closing probe connection: %w", err) + } + return err +} + +func (pl *probeListener) closeListener() { + if pl.ln != nil { + _ = pl.ln.Close() + } +} + +func (pl *probeListener) close() { + pl.closeListener() } diff --git a/activator/reuse/reuseport.c b/activator/reuse/reuseport.c index 0cadd61..8f552d4 100644 --- a/activator/reuse/reuseport.c +++ b/activator/reuse/reuseport.c @@ -2,8 +2,12 @@ // SPDX-License-Identifier: GPL-2.0 #include +#include +#include +#include #include -#include "bpf_endian.h" +#include +#include char __license[] SEC("license") = "Dual MIT/GPL"; @@ -20,6 +24,9 @@ struct { #define ETH_P_IP 0x0800 #define ETH_P_IPV6 0x86DD #define AF_INET6 10 +#define AF_INET 2 + +volatile __u8 probe_addr[16]; SEC("sk_reuseport/migrate") int select_or_migrate(struct sk_reuseport_md *md) @@ -28,12 +35,52 @@ int select_or_migrate(struct sk_reuseport_md *md) __u32 wake = 1; __u32 probe = 2; - if (!bpf_sk_select_reuseport(md, &listeners, &app, 0)) - return SK_PASS; - if (!bpf_sk_select_reuseport(md, &listeners, &wake, 0)) + // if app listener is active, pass traffic directly + if (!bpf_sk_select_reuseport(md, &listeners, &app, 0)) { return SK_PASS; - if (!bpf_sk_select_reuseport(md, &listeners, &probe, 0)) + } + + // when app is down, we want to select between probe and wake traffic + // comparing the saddr to the probe_addr + bool is_probe_traffic = false; + + struct bpf_sock *migrating = md->migrating_sk; + if (migrating) { + // during migration dst_ip4/dst_ip6 is the remote address + if (migrating->family == AF_INET) { + __u32 saddr = migrating->dst_ip4; + if (saddr == *(volatile __u32 *)probe_addr) { + // bpf_printk("being migrated: %pI4", &saddr); + is_probe_traffic = true; + } + } else { + if (__builtin_memcmp(migrating->dst_ip6, (void *)probe_addr, 16) == 0) { + // bpf_printk("being migrated: %pI6", &probe_addr); + is_probe_traffic = true; + } + } + } else if (md->eth_protocol == bpf_htons(ETH_P_IP)) { + __u32 saddr = 0; + if (bpf_skb_load_bytes_relative(md, offsetof(struct iphdr, saddr), &saddr, sizeof(saddr), BPF_HDR_START_NET) == 0) { + if (saddr == *(volatile __u32 *)probe_addr) { + is_probe_traffic = true; + } + } + } else if (md->eth_protocol == bpf_htons(ETH_P_IPV6)) { + __u32 saddr6[4] = {0}; + if (bpf_skb_load_bytes_relative(md, offsetof(struct ipv6hdr, saddr), saddr6, sizeof(saddr6), BPF_HDR_START_NET) == 0) { + if (__builtin_memcmp(saddr6, (void *)probe_addr, 16) == 0) { + is_probe_traffic = true; + } + } + } + + if (is_probe_traffic && !bpf_sk_select_reuseport(md, &listeners, &probe, 0)) { return SK_PASS; + } + if (!bpf_sk_select_reuseport(md, &listeners, &wake, 0)) { + return SK_PASS; + } return SK_DROP; } diff --git a/activator/reuse/reuseport_bpfeb.go b/activator/reuse/reuseport_bpfeb.go index c7344c3..4088af7 100644 --- a/activator/reuse/reuseport_bpfeb.go +++ b/activator/reuse/reuseport_bpfeb.go @@ -68,6 +68,7 @@ type reuseportMapSpecs struct { // // It can be passed ebpf.CollectionSpec.Assign. type reuseportVariableSpecs struct { + ProbeAddr *ebpf.VariableSpec `ebpf:"probe_addr"` } // reuseportObjects contains all objects after they have been loaded into the kernel. @@ -103,6 +104,7 @@ func (m *reuseportMaps) Close() error { // // It can be passed to loadReuseportObjects or ebpf.CollectionSpec.LoadAndAssign. type reuseportVariables struct { + ProbeAddr *ebpf.Variable `ebpf:"probe_addr"` } // reuseportPrograms contains all programs after they have been loaded into the kernel. diff --git a/activator/reuse/reuseport_bpfeb.o b/activator/reuse/reuseport_bpfeb.o index adfba7d3979aa2add4a58675a8a7d826ac6d80b9..77bae1eb59987f070d0c7426bf50c8b5d5bbdb23 100644 GIT binary patch literal 6120 zcmb_fPi&k=6@TBZw>30Lw@DiuXy}AQmK`~c;~FcpO<0H6O{$PxJ5EI?(dW;*pY0|4 zFS~0uZWL-H3X#ge7X$~Sx?I`=hh9*6KuRu1IrQKI5{L@PNE{+@Acsoi5VZW>o0-q! 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zsUPTFgc&4b<70(EyaweKIoo+`8N-KGJitBOZ`*(2n)e{!7yRlb?8oJBBh{;iz^*z= zRj|uW(axPcW-}Et&Y?*m!0zaDx*^uyL zB%VG(4F9iLPtjf5s+VR&C4}`zbSO_~WB9I=lGEb&I&F|h#{Z+57AgyPYvl&Zcs{Kr zh;M$>BJn-fiTKw{AdX=X&lVzA@%^@4T2z$eqA;eazjye|0=HUB=?=_ cEKsPCcdadiK0c1ZwCvvFl(>{7Y(*2l0rh{1O8@`> diff --git a/activator/reuse/tracker.c b/activator/reuse/tracker.c index e5312f8..b80990a 100644 --- a/activator/reuse/tracker.c +++ b/activator/reuse/tracker.c @@ -2,9 +2,16 @@ #include #include +#include +#include +#include char __license[] SEC("license") = "Dual MIT/GPL"; +#define ETH_P_IP 0x0800 +#define ETH_P_IPV6 0x86DD +#define NEXTHDR_TCP 6 + struct { __uint(type, BPF_MAP_TYPE_HASH); __type(key, __u32); // dest port @@ -12,15 +19,66 @@ struct { __uint(max_entries, 128); // room for 128 ports in a container } socket_tracker SEC(".maps"); +struct ip_key { + __u32 prefixlen; + __u8 addr[16]; +}; + +struct { + __uint(type, BPF_MAP_TYPE_LPM_TRIE); + __type(key, struct ip_key); + __type(value, __u8); + __uint(max_entries, 16); + __uint(map_flags, BPF_F_NO_PREALLOC); +} ignored_addrs SEC(".maps"); + SEC("cgroup_skb/ingress") int track_ingress(struct __sk_buff *skb) { - __u32 dport = skb->local_port; - if (dport == 0) { - return 1; + __u16 proto = skb->protocol; + + if (proto == __bpf_constant_htons(ETH_P_IP)) { + struct iphdr ip; + if (bpf_skb_load_bytes(skb, 0, &ip, sizeof(ip)) < 0) return 1; + + if (ip.protocol == NEXTHDR_TCP) { + struct ip_key key = {}; + key.prefixlen = 32; + __builtin_memcpy(&key.addr, &ip.saddr, 4); + + if (bpf_map_lookup_elem(&ignored_addrs, &key)) { + return 1; + } + + __u16 dport; + __u32 l4_offset = ip.ihl * 4; + if (bpf_skb_load_bytes(skb, l4_offset + 2, &dport, 2) < 0) return 1; + + __u32 port_key = __bpf_ntohs(dport); + __u64 ts = bpf_ktime_get_ns(); + bpf_map_update_elem(&socket_tracker, &port_key, &ts, BPF_EXIST); + } } + else if (proto == __bpf_constant_htons(ETH_P_IPV6)) { + struct ipv6hdr ipv6; + if (bpf_skb_load_bytes(skb, 0, &ipv6, sizeof(ipv6)) < 0) return 1; + + if (ipv6.nexthdr == NEXTHDR_TCP) { + struct ip_key key = {}; + key.prefixlen = 128; + __builtin_memcpy(&key.addr, &ipv6.saddr, 16); - __u64 time = bpf_ktime_get_ns(); - bpf_map_update_elem(&socket_tracker, &dport, &time, BPF_ANY); + if (bpf_map_lookup_elem(&ignored_addrs, &key)) { + return 1; + } + + __u16 dport; + if (bpf_skb_load_bytes(skb, 40 + 2, &dport, 2) < 0) return 1; + + __u32 port_key = __bpf_ntohs(dport); + __u64 ts = bpf_ktime_get_ns(); + bpf_map_update_elem(&socket_tracker, &port_key, &ts, BPF_EXIST); + } + } return 1; } diff --git a/activator/reuse/tracker_bpfeb.go b/activator/reuse/tracker_bpfeb.go index c558502..a22b392 100644 --- a/activator/reuse/tracker_bpfeb.go +++ b/activator/reuse/tracker_bpfeb.go @@ -8,10 +8,17 @@ import ( _ "embed" "fmt" "io" + "structs" "github.com/cilium/ebpf" ) +type trackerIpKey struct { + _ structs.HostLayout + Prefixlen uint32 + Addr [16]uint8 +} + // loadTracker returns the embedded CollectionSpec for tracker. func loadTracker() (*ebpf.CollectionSpec, error) { reader := bytes.NewReader(_TrackerBytes) @@ -61,6 +68,7 @@ type trackerProgramSpecs struct { // // It can be passed ebpf.CollectionSpec.Assign. type trackerMapSpecs struct { + IgnoredAddrs *ebpf.MapSpec `ebpf:"ignored_addrs"` SocketTracker *ebpf.MapSpec `ebpf:"socket_tracker"` } @@ -90,11 +98,13 @@ func (o *trackerObjects) Close() error { // // It can be passed to loadTrackerObjects or ebpf.CollectionSpec.LoadAndAssign. type trackerMaps struct { + IgnoredAddrs *ebpf.Map `ebpf:"ignored_addrs"` SocketTracker *ebpf.Map `ebpf:"socket_tracker"` } func (m *trackerMaps) Close() error { return _TrackerClose( + m.IgnoredAddrs, m.SocketTracker, ) } diff --git a/activator/reuse/tracker_bpfeb.o b/activator/reuse/tracker_bpfeb.o index bf8c61a1d00ded2441e9cc313185d45379f22945..a0bf9ef09e0958b7e0c6231c46a27b45ebed56f1 100644 GIT binary patch literal 5624 zcmb_gU1%KF6+W}p+HPVes_V3l`gh|b>e>-2SyqMJ+OUozTL!09U70wcbTrzXm8P2A 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`json:"trackerIgnoreLocalhost"` + CapacityRequest bool `json:"capacityRequest"` + ProbeAddress string `json:"probeAddress"` AnnotationConfig `json:"-"` } @@ -229,11 +230,11 @@ func NewConfig(ctx context.Context, spec *specs.Spec) (*Config, error) { TrackerIgnoreLocalhost: DefaultTrackerIgnoreLocalhost, CapacityRequest: DefaultCapacityRequest, } - e, err := os.Executable() + path, err := relativeConfigFile() if err != nil { - return nil, fmt.Errorf("getting executable dir: %w", err) + return nil, err } - b, err := os.ReadFile(filepath.Join(filepath.Dir(e), "..", ConfigDir, ConfigFileName)) + b, err := os.ReadFile(path) if err == nil { if err := json.Unmarshal(b, cfg); err != nil { return nil, err @@ -264,6 +265,14 @@ func NewConfig(ctx context.Context, spec *specs.Spec) (*Config, error) { return cfg, nil } +func relativeConfigFile() (string, error) { + e, err := os.Executable() + if err != nil { + return "", fmt.Errorf("getting executable dir: %w", err) + } + return filepath.Join(filepath.Dir(e), "..", ConfigDir, ConfigFileName), nil +} + func (cfg Config) IsZeropodContainer() bool { if slices.Contains(cfg.ZeropodContainerNames, cfg.ContainerName) { return true @@ -295,3 +304,15 @@ func LiveMigrationEnabled(annotations map[string]string) bool { _, ok := annotations[LiveMigrateAnnotationKey] return ok } + +func (cfg Config) LastModified() time.Time { + configPath, err := relativeConfigFile() + if err != nil { + return time.Time{} + } + info, err := os.Stat(configPath) + if err != nil { + return time.Time{} + } + return info.ModTime() +} diff --git a/shim/container.go b/shim/container.go index 207d229..aa0d108 100644 --- a/shim/container.go +++ b/shim/container.go @@ -4,6 +4,7 @@ import ( "context" "errors" "fmt" + "net/netip" "os" "slices" "sync" @@ -63,6 +64,7 @@ type Container struct { evacuation sync.Once metrics *v1.ContainerMetrics runcVersion string + lastConfigReload time.Time } func New(ctx context.Context, cfg *v1.Config, r *taskAPI.CreateTaskRequest, pt stdio.Platform, events chan *v1.ContainerStatus) (*Container, error) { @@ -135,6 +137,33 @@ func (c *Container) Config() *v1.Config { return c.cfg } +func (c *Container) reloadConfig(ctx context.Context) error { + if c.cfg.LastModified().Equal(c.lastConfigReload) { + log.G(ctx).Infof("config file up to date: %s", c.lastConfigReload) + return nil + } + log.G(ctx).Infof("reloading config") + spec, err := GetSpec(c.Bundle) + if err != nil { + return fmt.Errorf("getting container spec: %w", err) + } + // copy ports since they might have been discovered on first startup + ports := c.cfg.Ports + cfg, err := v1.NewConfig(ctx, spec) + if err != nil { + return fmt.Errorf("creating config: %w", err) + } + c.cfg = cfg + if len(c.cfg.Ports) == 0 { + c.cfg.Ports = ports + } + if err := c.activator.Reload(c.activatorOpts(ctx)...); err != nil { + return err + } + c.lastConfigReload = c.cfg.LastModified() + return nil +} + func (c *Container) ScheduleScaleDown() { c.scheduleScaleDownIn(c.cfg.ScaleDownDuration) } @@ -382,11 +411,27 @@ func (c *Container) EvacDrainStarted() bool { return c.evacDrainStarted.Load() } +func (c *Container) activatorOpts(ctx context.Context) []reuse.Option { + opts := []reuse.Option{ + reuse.RestoreHook(c.restoreHandler(c.context)), + reuse.TrackerIgnoreLocalhost(c.cfg.TrackerIgnoreLocalhost), + } + if c.cfg.ProbeAddress != "" { + addr, err := netip.ParseAddr(c.cfg.ProbeAddress) + if err != nil { + log.G(ctx).WithError(err).Warn("invalid probe address configured") + } else { + opts = append(opts, reuse.ProbeAddr(&addr)) + } + } + return opts +} + func (c *Container) initActivator(ctx context.Context, enableRedirects bool) error { c.cancelInit() if c.activator == nil { - act, err := reuse.New(ctx, c.netNS, c.cfg.Spec.Linux.CgroupsPath) + act, err := reuse.New(ctx, c.netNS, c.cfg.Spec.Linux.CgroupsPath, c.activatorOpts(ctx)...) if err != nil { return err } @@ -470,7 +515,7 @@ func (c *Container) startActivator(ctx context.Context, ports ...uint16) error { // return err // } - if err := c.activator.Start(c.context, c.detectProbe(c.context), c.restoreHandler(c.context), c.Pid(), ports...); err != nil { + if err := c.activator.Start(c.context, c.Pid(), ports); err != nil { if errors.Is(err, activator.ErrMapNotFound) { return err } diff --git a/shim/restore.go b/shim/restore.go index 0a9d073..bdce633 100644 --- a/shim/restore.go +++ b/shim/restore.go @@ -48,6 +48,9 @@ func (c *Container) Restore(ctx context.Context) (*runc.Container, process.Proce if !c.ScaledDown() { return nil, nil, ErrAlreadyRestored } + if err := c.reloadConfig(ctx); err != nil { + log.G(ctx).WithError(err).Error("reloading config") + } resp, err := c.restoreCapacityRequest(ctx) if err != nil { // log the error but continue with restoring From e98b7bdd270fb76cc224f1f2b1936c5dcdf05838 Mon Sep 17 00:00:00 2001 From: Cyrill Troxler Date: Sun, 26 Jul 2026 11:25:23 +0200 Subject: [PATCH 05/17] feat: store kubelet addr in config --- api/shim/v1/config.go | 27 +++++++++++++++++++++++++++ cmd/installer/main.go | 17 ++++++----------- cmd/manager/main.go | 8 +++++--- config/base/node-daemonset.yaml | 2 ++ manager/redirector_attacher.go | 15 +++++++++++++-- 5 files changed, 53 insertions(+), 16 deletions(-) diff --git a/api/shim/v1/config.go b/api/shim/v1/config.go index 7541795..449d76d 100644 --- a/api/shim/v1/config.go +++ b/api/shim/v1/config.go @@ -18,6 +18,7 @@ import ( ) const ( + DefaultOptDir = "/opt/zeropod" ConfigDir = "etc" ConfigFileName = "shim.json" NodeLabel = "zeropod.ctrox.dev/node" @@ -316,3 +317,29 @@ func (cfg Config) LastModified() time.Time { } return info.ModTime() } + +func Load(optDir string) (*Config, error) { + b, err := os.ReadFile(filepath.Join(optDir, ConfigDir, ConfigFileName)) + if err != nil { + return nil, err + } + cfg := &Config{} + if err := json.Unmarshal(b, cfg); err != nil { + return nil, err + } + return cfg, nil +} + +func (cfg *Config) Write(optPath string) error { + b, err := json.MarshalIndent(cfg, "", " ") + if err != nil { + return fmt.Errorf("marshaling config: %w", err) + } + if err := os.MkdirAll(filepath.Join(optPath, ConfigDir), os.ModePerm); err != nil { + return err + } + if err := os.WriteFile(filepath.Join(optPath, ConfigDir, ConfigFileName), b, 0600); err != nil { + return fmt.Errorf("unable to write shim file: %w", err) + } + return nil +} diff --git a/cmd/installer/main.go b/cmd/installer/main.go index 8b00862..29e8ac1 100644 --- a/cmd/installer/main.go +++ b/cmd/installer/main.go @@ -4,7 +4,6 @@ import ( "bytes" "context" "crypto/x509" - "encoding/json" "encoding/pem" "errors" "flag" @@ -232,18 +231,14 @@ func installRuntime(ctx context.Context, runtime containerRuntime) error { return fmt.Errorf("unable to write shim file: %w", err) } - b, err := json.MarshalIndent(&v1.Config{ - TrackerIgnoreLocalhost: *trackerIgnoreLocalhost, - CapacityRequest: *capacityRequest, - }, "", " ") + cfg, err := v1.Load(opt) if err != nil { - return fmt.Errorf("marshaling config: %w", err) + return fmt.Errorf("loading config: %w", err) } - if err := os.MkdirAll(filepath.Join(opt, v1.ConfigDir), os.ModePerm); err != nil { - return err - } - if err := os.WriteFile(filepath.Join(opt, v1.ConfigDir, v1.ConfigFileName), b, 0600); err != nil { - return fmt.Errorf("unable to write shim file: %w", err) + cfg.TrackerIgnoreLocalhost = *trackerIgnoreLocalhost + cfg.CapacityRequest = *capacityRequest + if err := cfg.Write(opt); err != nil { + return fmt.Errorf("writing config: %w", err) } if runtime == runtimeK3S { diff --git a/cmd/manager/main.go b/cmd/manager/main.go index 0d40c81..8a4aca9 100644 --- a/cmd/manager/main.go +++ b/cmd/manager/main.go @@ -155,7 +155,7 @@ func main() { EnableOpenMetrics: true, }), ) - mux.Handle("/probe", http.HandlerFunc(probeHander(redirector))) + mux.Handle("/probe", http.HandlerFunc(probeHander(redirector, log))) server := &http.Server{Addr: *metricsAddr, Handler: mux} go func() { @@ -255,14 +255,16 @@ func newControllerManager(nodeName string) (ctrlmanager.Manager, error) { // probeHandler responds to kublet probes and extracts the remoteAddr to // populate the kubeletAddr of the redirector which is used for probe detection. -func probeHander(redirector *manager.Redirector) http.HandlerFunc { +func probeHander(redirector *manager.Redirector, log *slog.Logger) http.HandlerFunc { return func(w http.ResponseWriter, r *http.Request) { host, _, err := net.SplitHostPort(r.RemoteAddr) if err == nil { addr, err := netip.ParseAddr(host) if err == nil { if redirector != nil { - redirector.InitKubeletAddr(addr) + if err := redirector.InitKubeletAddr(addr); err != nil { + log.Error("init kubelet addr failed", "error", err) + } } } } diff --git a/config/base/node-daemonset.yaml b/config/base/node-daemonset.yaml index 2c7d0fa..1c1b1af 100644 --- a/config/base/node-daemonset.yaml +++ b/config/base/node-daemonset.yaml @@ -83,6 +83,8 @@ spec: name: zeropod-run - mountPath: /var/lib/zeropod name: zeropod-var + - mountPath: /opt/zeropod + name: zeropod-opt - mountPath: /hostproc name: hostproc - mountPath: /sys/fs/bpf diff --git a/manager/redirector_attacher.go b/manager/redirector_attacher.go index 6b1e939..e720d16 100644 --- a/manager/redirector_attacher.go +++ b/manager/redirector_attacher.go @@ -15,6 +15,7 @@ import ( "github.com/containernetworking/plugins/pkg/ns" "github.com/ctrox/zeropod/activator" + v1 "github.com/ctrox/zeropod/api/shim/v1" "github.com/fsnotify/fsnotify" ) @@ -59,12 +60,22 @@ func AttachRedirectors(ctx context.Context, log *slog.Logger, activatorOpts ...a } // InitKubeletAddr sets the kubelet addr on the [Redirector] if it's unset. -func (r *Redirector) InitKubeletAddr(addr netip.Addr) { +func (r *Redirector) InitKubeletAddr(addr netip.Addr) error { if r.kubeletAddr != nil { - return + return nil } r.log.Info("redirector kubelet addr set", "addr", addr) r.kubeletAddr = &addr + return r.storekubeletAddrInConfig() +} + +func (r *Redirector) storekubeletAddrInConfig() error { + cfg, err := v1.Load(v1.DefaultOptDir) + if err != nil { + return fmt.Errorf("lading config: %w", err) + } + cfg.ProbeAddress = r.kubeletAddr.String() + return cfg.Write(v1.DefaultOptDir) } func (r *Redirector) reconcile() error { From 0b3363e181dbf0957e512ac5f4910882b03ce2e5 Mon Sep 17 00:00:00 2001 From: Cyrill Troxler Date: Sun, 26 Jul 2026 18:08:13 +0200 Subject: [PATCH 06/17] feat: implement forwarding --- activator/reuse/activator.go | 61 +++++++++--- activator/reuse/forward.go | 186 +++++++++++++++++++++++++++++++++++ shim/container.go | 2 +- shim/restore.go | 3 +- 4 files changed, 238 insertions(+), 14 deletions(-) create mode 100644 activator/reuse/forward.go diff --git a/activator/reuse/activator.go b/activator/reuse/activator.go index 33c4d72..484c714 100644 --- a/activator/reuse/activator.go +++ b/activator/reuse/activator.go @@ -40,6 +40,7 @@ type Activator struct { wakeListeners map[listenerKey]*wakeListener probeListeners map[listenerKey]*probeListener appListeners map[listenerKey]*appListener + forwarder map[listenerKey]*forwarder wakeInodes []uint64 log *log.Entry ns ns.NetNS @@ -71,6 +72,7 @@ func New(ctx context.Context, ns ns.NetNS, cgroupsPath string, opts ...Option) ( wakeListeners: make(map[listenerKey]*wakeListener), appListeners: make(map[listenerKey]*appListener), probeListeners: make(map[listenerKey]*probeListener), + forwarder: make(map[listenerKey]*forwarder), Config: cfg, } if err := act.LoadBPF(); err != nil { @@ -165,15 +167,41 @@ func ProbeAddr(addr *netip.Addr) Option { } } -func (act *Activator) Start(ctx context.Context, pid int, ports []uint16) error { +func (act *Activator) Start(ctx context.Context, pid int, ports []uint16, skipStart bool) error { act.ports = ports - before := time.Now() - if err := act.registerListeners(pid); err != nil { - act.log.WithError(err).Error("registering listeners") - return err + if skipStart { + // TODO: test if this works correctly with all combination of app + // sockets (tcp4, tcp6, tcp6only) + // also make this a bit nicer! + for _, port := range ports { + for _, net := range []network{networkTCP4, networkTCP6ONLY} { + key := listenerKey{port: port, network: net} + objs := &reuseportObjects{} + if err := loadReuseportObjects(objs, &ebpf.CollectionOptions{}); err != nil { + return fmt.Errorf("loading reuseport objects: %w", err) + } + if act.probeAddr != nil { + if err := objs.ProbeAddr.Set(act.probeAddrValue()); err != nil { + return err + } + } + act.mu.Lock() + act.wakeListeners[key] = &wakeListener{reuse: objs} + act.mu.Unlock() + } + } + if err := act.ScaleDown(); err != nil { + return err + } + } else { + before := time.Now() + if err := act.registerListeners(pid); err != nil { + act.log.WithError(err).Error("registering listeners") + return err + } + act.log.Debugf("registered listeners in %s", time.Since(before)) } - act.log.Debugf("registered listeners in %s", time.Since(before)) act.started.Store(true) return act.initSocketTracker() @@ -192,6 +220,9 @@ func (act *Activator) Stop() error { for _, pl := range act.probeListeners { pl.close() } + for _, fwd := range act.forwarder { + fwd.close() + } if act.sockoptObjects != nil { act.sockoptObjects.Close() } @@ -329,18 +360,23 @@ func IgnoreAddr(addrMap *ebpf.Map, ip string) error { } func (act *Activator) wake(network network) error { + closeProbe := false if act.restoreHook != nil { pid, err := act.restoreHook() if err != nil { act.log.WithError(err).Error("restore hook") return err } - before := time.Now() - if err := act.registerListeners(pid); err != nil { - act.log.WithError(err).Error("registering listeners") - return err + // TODO: should retoreHook return NoCapacity? + if pid != 0 { + closeProbe = true + before := time.Now() + if err := act.registerListeners(pid); err != nil { + act.log.WithError(err).Error("registering listeners") + return err + } + act.log.Debugf("registered listeners in %s", time.Since(before)) } - act.log.Debugf("registered listeners in %s", time.Since(before)) } act.mu.Lock() defer act.mu.Unlock() @@ -348,6 +384,9 @@ func (act *Activator) wake(network network) error { wl.closeListener() } for _, pl := range act.probeListeners { + if !closeProbe { + continue + } pl.closeListener() } // sk_reuseport/migrate only seems to migrate pending connections to the diff --git a/activator/reuse/forward.go b/activator/reuse/forward.go new file mode 100644 index 0000000..c70187d --- /dev/null +++ b/activator/reuse/forward.go @@ -0,0 +1,186 @@ +package reuse + +import ( + "context" + "errors" + "fmt" + "io" + "net" + "sync" + "syscall" + "time" + + "github.com/containerd/log" + "github.com/containernetworking/plugins/pkg/ns" +) + +type forwarder struct { + targetAddr string + connectTimeout time.Duration + log *log.Entry + ln net.Listener + ns ns.NetNS + quit chan struct{} +} + +// ForwardToTarget creates a TCP proxy and replaces the app listener with it to +// forward traffic to the target addr. +// TODO: the tracker does not detect this traffic for some reason. +func (act *Activator) ForwardToTarget(ctx context.Context, addr string) error { + act.log.Infof("starting forward to target %s", addr) + act.mu.Lock() + defer act.mu.Unlock() + for k, wl := range act.wakeListeners { + fwd := &forwarder{ + targetAddr: addr, + log: act.log, + ns: act.ns, + // TODO: parameter + connectTimeout: time.Minute, + } + if err := act.ns.Do(func(nn ns.NetNS) error { + ln, err := listenReuseport(k.port, k.network) + if err != nil { + return err + } + fwd.ln = ln + return nil + }); err != nil { + return err + } + if err := act.attachNetListener(fwd.ln, appKey, wl.reuse.Listeners, wl.reuse.SelectOrMigrate, nil); err != nil { + return fmt.Errorf("registering listener: %w", err) + } + act.forwarder[k] = fwd + go fwd.serveForward(ctx, fwd.ln, k.port) + } + return nil +} + +func (fwd *forwarder) close() { + fwd.quit <- struct{}{} + if fwd.ln != nil { + _ = fwd.ln.Close() + } +} + +func (fwd *forwarder) serveForward(ctx context.Context, listener net.Listener, port uint16) { + wg := sync.WaitGroup{} + + for { + conn, err := listener.Accept() + if err != nil { + select { + // TODO: we need this again? Or can we just use ctx? + case <-fwd.quit: + wg.Wait() + return + case <-ctx.Done(): + wg.Wait() + return + default: + if !errors.Is(err, net.ErrClosed) { + fwd.log.Errorf("error accepting: %s", err) + } + return + } + } else { + wg.Go(func() { + fwd.log.Debug("forwarder: accepting connection") + fwd.handleForwardConn(ctx, conn, port) + }) + } + } +} + +func (fwd *forwarder) handleForwardConn(ctx context.Context, conn net.Conn, port uint16) { + backendConn, err := fwd.connect(ctx, port, fwd.targetAddr) + if err != nil { + log.G(ctx).Errorf("error establishing connection: %s", err) + return + } + defer backendConn.Close() + + requestContext, cancel := context.WithTimeout(ctx, time.Minute) + defer cancel() + if err := proxy(requestContext, conn, backendConn); err != nil { + log.G(ctx).Errorf("error proxying request: %s", err) + } +} + +func (fwd *forwarder) connect(ctx context.Context, port uint16, addr string) (net.Conn, error) { + var backendConn net.Conn + dialer := net.Dialer{ + Timeout: fwd.connectTimeout, + } + targetAddr, err := net.ResolveTCPAddr("tcp", addr+":0") + if err != nil { + return nil, fmt.Errorf("parsing target addr: %w", err) + } + targetAddr.Port = int(port) + // if we dial a remote target we want a smaller timeout as we might run + // into an io timeout instead of connection refused + dialer.Timeout = time.Millisecond * 10 + fwd.log.Debugf("forwarder: connecting to target address %s", targetAddr.String()) + ticker := time.NewTicker(time.Millisecond) + + defer ticker.Stop() + start := time.Now() + for { + select { + case <-ctx.Done(): + return nil, ctx.Err() + case <-ticker.C: + if time.Since(start) > fwd.connectTimeout { + return nil, fmt.Errorf("timeout dialing process") + } + if err := fwd.ns.Do(func(_ ns.NetNS) error { + var err error + backendConn, err = dialer.Dial("tcp", targetAddr.String()) + return err + }); err != nil { + var serr syscall.Errno + if errors.As(err, &serr) && serr == syscall.ECONNREFUSED { + // executed program might not be ready yet, so retry in a bit. + continue + } + var operr *net.OpError + if errors.As(err, &operr) && operr.Temporary() { + fwd.log.Errorf("temporary operr: %s", operr) + continue + } + return nil, fmt.Errorf("unable to connect to process: %s", err) + } + + return backendConn, nil + } + } +} + +// proxy just proxies between conn1 and conn2. +func proxy(ctx context.Context, conn1, conn2 net.Conn) error { + defer conn1.Close() + defer conn2.Close() + + errors := make(chan error, 2) + done := make(chan struct{}, 2) + go cp(done, errors, conn2, conn1) + go cp(done, errors, conn1, conn2) + + select { + case <-ctx.Done(): + return nil + case <-done: + return nil + case err := <-errors: + return err + } +} + +func cp(done chan struct{}, errors chan error, dst io.Writer, src io.Reader) { + _, err := io.Copy(dst, src) + done <- struct{}{} + if err != nil { + errors <- err + } +} diff --git a/shim/container.go b/shim/container.go index aa0d108..be60e30 100644 --- a/shim/container.go +++ b/shim/container.go @@ -515,7 +515,7 @@ func (c *Container) startActivator(ctx context.Context, ports ...uint16) error { // return err // } - if err := c.activator.Start(c.context, c.Pid(), ports); err != nil { + if err := c.activator.Start(c.context, c.Pid(), ports, c.skipStart); err != nil { if errors.Is(err, activator.ErrMapNotFound) { return err } diff --git a/shim/restore.go b/shim/restore.go index bdce633..2745b4f 100644 --- a/shim/restore.go +++ b/shim/restore.go @@ -57,8 +57,7 @@ func (c *Container) Restore(ctx context.Context) (*runc.Container, process.Proce log.G(ctx).WithError(err).Error("requesting restore capacity") } else if !resp.Allowed { if resp.RedirectAddr != "" { - // TODO: implement ForwardToTarget - // c.activator.ForwardToTarget(resp.RedirectAddr) + c.activator.ForwardToTarget(ctx, resp.RedirectAddr) } return nil, nil, ErrNoCapacity } From 550f770c45baf30e8616682f22f9da05e465b66d Mon Sep 17 00:00:00 2001 From: Cyrill Troxler Date: Sat, 1 Aug 2026 14:09:18 +0200 Subject: [PATCH 07/17] feat: store listener metadata for migration --- activator/reuse/activator.go | 70 +++--- activator/reuse/listener.go | 112 ++++++---- activator/reuse/probe.go | 2 +- api/node/v1/node.pb.go | 204 ++++++++++++------ api/node/v1/node.proto | 7 + api/runtime/v1/types.go | 7 + api/runtime/v1/zz_generated.deepcopy.go | 5 + .../runtime.zeropod.ctrox.dev_migrations.yaml | 13 ++ manager/node/service.go | 10 + shim/container.go | 15 +- shim/evac.go | 8 + shim/restore.go | 22 +- 12 files changed, 327 insertions(+), 148 deletions(-) diff --git a/activator/reuse/activator.go b/activator/reuse/activator.go index 484c714..73823fe 100644 --- a/activator/reuse/activator.go +++ b/activator/reuse/activator.go @@ -25,12 +25,12 @@ import ( //go:generate go run github.com/cilium/ebpf/cmd/bpf2go -cc $BPF_CLANG -cflags $BPF_CFLAGS sockopt sockopt.c //go:generate go run github.com/cilium/ebpf/cmd/bpf2go -cc $BPF_CLANG -cflags $BPF_CFLAGS tracker tracker.c -type network string +type Network string const ( - networkTCP4 network = "tcp4" - networkTCP6 network = "tcp6" - networkTCP6ONLY network = "tcp" + networkTCP4 Network = "tcp4" + networkTCPAny Network = "tcp" + networkTCP6ONLY Network = "tcp6" ) type Activator struct { @@ -167,29 +167,24 @@ func ProbeAddr(addr *netip.Addr) Option { } } -func (act *Activator) Start(ctx context.Context, pid int, ports []uint16, skipStart bool) error { - act.ports = ports +func (act *Activator) Start(ctx context.Context, pid int, listeners Listeners, skipStart bool) error { + act.ports = listeners.Ports() if skipStart { - // TODO: test if this works correctly with all combination of app - // sockets (tcp4, tcp6, tcp6only) - // also make this a bit nicer! - for _, port := range ports { - for _, net := range []network{networkTCP4, networkTCP6ONLY} { - key := listenerKey{port: port, network: net} - objs := &reuseportObjects{} - if err := loadReuseportObjects(objs, &ebpf.CollectionOptions{}); err != nil { - return fmt.Errorf("loading reuseport objects: %w", err) - } - if act.probeAddr != nil { - if err := objs.ProbeAddr.Set(act.probeAddrValue()); err != nil { - return err - } + for _, ln := range listeners { + key := listenerKey{port: ln.Port, network: ln.Network} + objs := &reuseportObjects{} + if err := loadReuseportObjects(objs, &ebpf.CollectionOptions{}); err != nil { + return fmt.Errorf("loading reuseport objects: %w", err) + } + if act.probeAddr != nil { + if err := objs.ProbeAddr.Set(act.probeAddrValue()); err != nil { + return err } - act.mu.Lock() - act.wakeListeners[key] = &wakeListener{reuse: objs} - act.mu.Unlock() } + act.mu.Lock() + act.wakeListeners[key] = &wakeListener{reuse: objs} + act.mu.Unlock() } if err := act.ScaleDown(); err != nil { return err @@ -359,7 +354,7 @@ func IgnoreAddr(addrMap *ebpf.Map, ip string) error { return addrMap.Put(&key, value) } -func (act *Activator) wake(network network) error { +func (act *Activator) wake(network Network) error { closeProbe := false if act.restoreHook != nil { pid, err := act.restoreHook() @@ -400,10 +395,10 @@ func (act *Activator) wake(network network) error { return nil } -func (act *Activator) poke(port uint16, network network) error { +func (act *Activator) poke(port uint16, network Network) error { return act.ns.Do(func(nn ns.NetNS) error { addr := fmt.Sprintf("127.0.0.1:%d", port) - if network == networkTCP6 || network == networkTCP6ONLY { + if network == networkTCPAny || network == networkTCP6ONLY { addr = fmt.Sprintf("[::1]:%d", port) } dialer := net.Dialer{Timeout: time.Second} @@ -438,3 +433,26 @@ func (act *Activator) ScaleDown() error { act.log.Debugf("listening for new connections on %d wake listeners: %v", len(act.wakeListeners), act.wakeListeners) return nil } + +type Listener struct { + Port uint16 + Network Network +} + +type Listeners []Listener + +func (act *Activator) GetListeners() []Listener { + listeners := []Listener{} + for k := range act.appListeners { + listeners = append(listeners, Listener{Port: k.port, Network: k.network}) + } + return listeners +} + +func (lns Listeners) Ports() []uint16 { + ports := []uint16{} + for _, ln := range lns { + ports = append(ports, ln.Port) + } + return ports +} diff --git a/activator/reuse/listener.go b/activator/reuse/listener.go index b48c55f..f9b34dd 100644 --- a/activator/reuse/listener.go +++ b/activator/reuse/listener.go @@ -32,15 +32,15 @@ type appListener struct { type listenerKey struct { port uint16 - network network + network Network } type listener struct { - port uint16 - family uint8 - inode uint32 - origFd int - fd *os.File + port uint16 + network Network + inode uint32 + origFd int + fd *os.File } var ErrNoListeningSockets = errors.New("no listening sockets found") @@ -61,8 +61,9 @@ func (wl *wakeListener) close() { } } -func (act *Activator) listenWake(port uint16, network network, wl *wakeListener) error { +func (act *Activator) listenWake(port uint16, network Network, wl *wakeListener) error { if err := act.ns.Do(func(nn ns.NetNS) error { + act.log.Infof("listening wake: %d %s", port, network) ln, err := listenReuseport(port, network) if err != nil { return fmt.Errorf("wake listener: %w", err) @@ -97,7 +98,7 @@ func (act *Activator) listenWake(port uint16, network network, wl *wakeListener) // watchWake polls the wake listener without ever accepting and calls wake as // soon as the poll returns something. -func (act *Activator) watchWake(epfd int, fd uintptr, network network) { +func (act *Activator) watchWake(epfd int, fd uintptr, network Network) { defer func() { _ = unix.EpollCtl(epfd, unix.EPOLL_CTL_DEL, int(fd), nil) _ = unix.Close(epfd) @@ -142,7 +143,7 @@ func (act *Activator) registerListeners(pid int) error { defer act.mu.Unlock() before := time.Now() - listeners, err := act.listenerFds(pid, len(act.ports)) + listeners, err := act.listenerFds(pid) if err != nil { return err } @@ -157,11 +158,7 @@ func (act *Activator) registerListeners(pid int) error { } defer l.fd.Close() - net := networkTCP4 - if l.family == unix.AF_INET6 { - net = networkTCP6ONLY - } - key := listenerKey{port: l.port, network: net} + key := listenerKey{port: l.port, network: l.network} if _, ok := act.wakeListeners[key]; !ok { objs := &reuseportObjects{} if err := loadReuseportObjects(objs, &ebpf.CollectionOptions{}); err != nil { @@ -175,7 +172,7 @@ func (act *Activator) registerListeners(pid int) error { act.wakeListeners[key] = &wakeListener{reuse: objs} } wl := act.wakeListeners[key] - act.log.Debugf("registering ln %d port %d family %d ino %d", l.fd.Fd(), l.port, l.family, l.inode) + act.log.Debugf("registering ln %d port %d net %s ino %d", l.fd.Fd(), l.port, l.network, l.inode) if err := act.attachListener(appKey, l.fd.Fd(), wl.reuse.Listeners, wl.reuse.SelectOrMigrate); err != nil { return fmt.Errorf("registering listener: %w", err) } @@ -203,11 +200,17 @@ func (act *Activator) probeAddrValue() [16]byte { return ebpfProbeAddr } -func (act *Activator) listenerFds(pid int, minListeners int) ([]listener, error) { +func (act *Activator) listenerFds(pid int) ([]listener, error) { l, err := act.listenerFdsFromCache(pid) - if err == nil && len(l) >= minListeners { + if err == nil && len(l) > 0 && len(l) == len(act.appListeners) { return l, nil } + // close fds in case the cache returned partial listeners + for _, ln := range l { + if ln.fd != nil { + _ = ln.fd.Close() + } + } listeners, err := act.getListeningInodes(pid) if err != nil { return nil, err @@ -242,6 +245,12 @@ func (act *Activator) listenerFds(pid int, minListeners int) ([]listener, error) if err != nil { continue } + network, err := getNetworkFromSock(fd) + if err != nil { + _ = unix.Close(fd) + continue + } + listener.network = network listener.fd = os.NewFile(uintptr(fd), "") listener.origFd = target listenersWithFd = append(listenersWithFd, listener) @@ -251,6 +260,20 @@ func (act *Activator) listenerFds(pid int, minListeners int) ([]listener, error) return listenersWithFd, nil } +func getNetworkFromSock(fd int) (Network, error) { + domain, err := unix.GetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_DOMAIN) + if err != nil { + return Network(""), err + } + if domain == unix.AF_INET6 { + if v, err := unix.GetsockoptInt(fd, unix.IPPROTO_IPV6, unix.IPV6_V6ONLY); err == nil && v == 1 { + return networkTCP6ONLY, nil + } + return networkTCPAny, nil + } + return networkTCP4, nil +} + // attachListener attaches select_or_migrate to the listeners reuseport group // and puts it into the key slot. func (act *Activator) attachListener(key uint32, lnFd uintptr, bpfMap *ebpf.Map, @@ -293,7 +316,7 @@ func (act *Activator) attachNetListener(ln net.Listener, key uint32, bpfMap *ebp } // listenReuseport opens a TCP listener with SO_REUSEPORT -func listenReuseport(port uint16, network network) (*net.TCPListener, error) { +func listenReuseport(port uint16, network Network) (*net.TCPListener, error) { lc := net.ListenConfig{ Control: func(_, _ string, c syscall.RawConn) error { var serr error @@ -302,9 +325,6 @@ func listenReuseport(port uint16, network network) (*net.TCPListener, error) { if serr != nil { return } - if network == networkTCP6ONLY { - serr = unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_V6ONLY, 0) - } }); err != nil { return err } @@ -312,11 +332,7 @@ func listenReuseport(port uint16, network network) (*net.TCPListener, error) { }, } lc.SetMultipathTCP(false) - n := string(network) - if network == networkTCP6ONLY { - n = string(networkTCP6) - } - ln, err := lc.Listen(context.Background(), n, fmt.Sprintf(":%d", port)) + ln, err := lc.Listen(context.Background(), string(network), fmt.Sprintf(":%d", port)) if err != nil { return nil, err } @@ -334,9 +350,10 @@ func (act *Activator) listenerFdsFromCache(pid int) ([]listener, error) { if err != nil { return nil, err } + resolved := map[listenerKey]struct{}{} for _, cpid := range pids { // bail out early as we found all listeners - if len(listeners) == len(cache) { + if len(resolved) == len(cache) { break } @@ -347,17 +364,22 @@ func (act *Activator) listenerFdsFromCache(pid int) ([]listener, error) { defer unix.Close(pidfd) for k, v := range cache { + if _, ok := resolved[k]; ok { + continue + } fd, err := unix.PidfdGetfd(pidfd, v.fd, 0) if err != nil { continue } var stat unix.Stat_t if err := unix.Fstat(int(fd), &stat); err != nil { - return nil, err + _ = unix.Close(fd) + continue } sockaddr, err := unix.Getsockname(fd) if err != nil { + _ = unix.Close(fd) continue } @@ -369,19 +391,25 @@ func (act *Activator) listenerFdsFromCache(pid int) ([]listener, error) { port = sa.Port } if k.port != uint16(port) { + _ = unix.Close(fd) continue } - - family := uint8(unix.AF_INET) - if k.network == networkTCP6 || k.network == networkTCP6ONLY { - family = unix.AF_INET6 + network, err := getNetworkFromSock(fd) + if err != nil { + _ = unix.Close(fd) + continue + } + if network != k.network { + _ = unix.Close(fd) + continue } + resolved[k] = struct{}{} listeners = append(listeners, listener{ - port: k.port, - family: family, - fd: os.NewFile(uintptr(fd), ""), - origFd: v.fd, - inode: uint32(stat.Ino), + port: k.port, + network: network, + fd: os.NewFile(uintptr(fd), ""), + origFd: v.fd, + inode: uint32(stat.Ino), }) } } @@ -456,9 +484,8 @@ func (act *Activator) getListeningInodes(pid int) ([]listener, error) { continue } listeners = append(listeners, listener{ - port: uint16(sock.LocalPort), - family: unix.AF_INET, - inode: uint32(sock.Inode), + port: uint16(sock.LocalPort), + inode: uint32(sock.Inode), }) } } @@ -468,9 +495,8 @@ func (act *Activator) getListeningInodes(pid int) ([]listener, error) { continue } listeners = append(listeners, listener{ - port: uint16(sock.LocalPort), - family: unix.AF_INET6, - inode: uint32(sock.Inode), + port: uint16(sock.LocalPort), + inode: uint32(sock.Inode), }) } } diff --git a/activator/reuse/probe.go b/activator/reuse/probe.go index ac9d2bf..e2290c1 100644 --- a/activator/reuse/probe.go +++ b/activator/reuse/probe.go @@ -13,7 +13,7 @@ type probeListener struct { ln net.Listener } -func (act *Activator) listenProbe(port uint16, network network, wl *wakeListener, pl *probeListener) error { +func (act *Activator) listenProbe(port uint16, network Network, wl *wakeListener, pl *probeListener) error { if err := act.ns.Do(func(nn ns.NetNS) error { ln, err := listenReuseport(port, network) if err != nil { diff --git a/api/node/v1/node.pb.go b/api/node/v1/node.pb.go index 0cde6fa..20a82c4 100644 --- a/api/node/v1/node.pb.go +++ b/api/node/v1/node.pb.go @@ -215,6 +215,58 @@ func (x *RestoreResponse) GetMigrationInfo() *MigrationInfo { return nil } +type Listener struct { + state protoimpl.MessageState `protogen:"open.v1"` + Port int32 `protobuf:"varint,1,opt,name=port,proto3" json:"port,omitempty"` + Network string `protobuf:"bytes,2,opt,name=network,proto3" json:"network,omitempty"` + unknownFields protoimpl.UnknownFields + sizeCache protoimpl.SizeCache +} + +func (x *Listener) Reset() { + *x = Listener{} + mi := &file_node_proto_msgTypes[4] + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + ms.StoreMessageInfo(mi) +} + +func (x *Listener) String() string { + return protoimpl.X.MessageStringOf(x) +} + +func (*Listener) ProtoMessage() {} + +func (x *Listener) ProtoReflect() protoreflect.Message { + mi := &file_node_proto_msgTypes[4] + if x != nil { + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + if ms.LoadMessageInfo() == nil { + ms.StoreMessageInfo(mi) + } + return ms + } + return mi.MessageOf(x) +} + +// Deprecated: Use Listener.ProtoReflect.Descriptor instead. +func (*Listener) Descriptor() ([]byte, []int) { + return file_node_proto_rawDescGZIP(), []int{4} +} + +func (x *Listener) GetPort() int32 { + if x != nil { + return x.Port + } + return 0 +} + +func (x *Listener) GetNetwork() string { + if x != nil { + return x.Network + } + return "" +} + type PodInfo struct { state protoimpl.MessageState `protogen:"open.v1"` Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"` @@ -222,13 +274,14 @@ type PodInfo struct { ContainerName string `protobuf:"bytes,3,opt,name=container_name,json=containerName,proto3" json:"container_name,omitempty"` Ports []int32 `protobuf:"varint,4,rep,packed,name=ports,proto3" json:"ports,omitempty"` Ip string `protobuf:"bytes,5,opt,name=ip,proto3" json:"ip,omitempty"` + Listeners []*Listener `protobuf:"bytes,6,rep,name=listeners,proto3" json:"listeners,omitempty"` unknownFields protoimpl.UnknownFields sizeCache protoimpl.SizeCache } func (x *PodInfo) Reset() { *x = PodInfo{} - mi := &file_node_proto_msgTypes[4] + mi := &file_node_proto_msgTypes[5] ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) ms.StoreMessageInfo(mi) } @@ -240,7 +293,7 @@ func (x *PodInfo) String() string { func (*PodInfo) ProtoMessage() {} func (x *PodInfo) ProtoReflect() protoreflect.Message { - mi := &file_node_proto_msgTypes[4] + mi := &file_node_proto_msgTypes[5] if x != nil { ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) if ms.LoadMessageInfo() == nil { @@ -253,7 +306,7 @@ func (x *PodInfo) ProtoReflect() protoreflect.Message { // Deprecated: Use PodInfo.ProtoReflect.Descriptor instead. func (*PodInfo) Descriptor() ([]byte, []int) { - return file_node_proto_rawDescGZIP(), []int{4} + return file_node_proto_rawDescGZIP(), []int{5} } func (x *PodInfo) GetName() string { @@ -291,6 +344,13 @@ func (x *PodInfo) GetIp() string { return "" } +func (x *PodInfo) GetListeners() []*Listener { + if x != nil { + return x.Listeners + } + return nil +} + type MigrationInfo struct { state protoimpl.MessageState `protogen:"open.v1"` ImageId string `protobuf:"bytes,1,opt,name=image_id,json=imageId,proto3" json:"image_id,omitempty"` @@ -300,13 +360,14 @@ type MigrationInfo struct { RestoreStart *timestamppb.Timestamp `protobuf:"bytes,5,opt,name=restore_start,json=restoreStart,proto3" json:"restore_start,omitempty"` RestoreEnd *timestamppb.Timestamp `protobuf:"bytes,6,opt,name=restore_end,json=restoreEnd,proto3" json:"restore_end,omitempty"` Ports []int32 `protobuf:"varint,7,rep,packed,name=ports,proto3" json:"ports,omitempty"` + Listeners []*Listener `protobuf:"bytes,8,rep,name=listeners,proto3" json:"listeners,omitempty"` unknownFields protoimpl.UnknownFields sizeCache protoimpl.SizeCache } func (x *MigrationInfo) Reset() { *x = MigrationInfo{} - mi := &file_node_proto_msgTypes[5] + mi := &file_node_proto_msgTypes[6] ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) ms.StoreMessageInfo(mi) } @@ -318,7 +379,7 @@ func (x *MigrationInfo) String() string { func (*MigrationInfo) ProtoMessage() {} func (x *MigrationInfo) ProtoReflect() protoreflect.Message { - mi := &file_node_proto_msgTypes[5] + mi := &file_node_proto_msgTypes[6] if x != nil { ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) if ms.LoadMessageInfo() == nil { @@ -331,7 +392,7 @@ func (x *MigrationInfo) ProtoReflect() protoreflect.Message { // Deprecated: Use MigrationInfo.ProtoReflect.Descriptor instead. func (*MigrationInfo) Descriptor() ([]byte, []int) { - return file_node_proto_rawDescGZIP(), []int{5} + return file_node_proto_rawDescGZIP(), []int{6} } func (x *MigrationInfo) GetImageId() string { @@ -383,6 +444,13 @@ func (x *MigrationInfo) GetPorts() []int32 { return nil } +func (x *MigrationInfo) GetListeners() []*Listener { + if x != nil { + return x.Listeners + } + return nil +} + type Image struct { state protoimpl.MessageState `protogen:"open.v1"` ImageData []byte `protobuf:"bytes,1,opt,name=imageData,proto3" json:"imageData,omitempty"` @@ -392,7 +460,7 @@ type Image struct { func (x *Image) Reset() { *x = Image{} - mi := &file_node_proto_msgTypes[6] + mi := &file_node_proto_msgTypes[7] ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) ms.StoreMessageInfo(mi) } @@ -404,7 +472,7 @@ func (x *Image) String() string { func (*Image) ProtoMessage() {} func (x *Image) ProtoReflect() protoreflect.Message { - mi := &file_node_proto_msgTypes[6] + mi := &file_node_proto_msgTypes[7] if x != nil { ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) if ms.LoadMessageInfo() == nil { @@ -417,7 +485,7 @@ func (x *Image) ProtoReflect() protoreflect.Message { // Deprecated: Use Image.ProtoReflect.Descriptor instead. func (*Image) Descriptor() ([]byte, []int) { - return file_node_proto_rawDescGZIP(), []int{6} + return file_node_proto_rawDescGZIP(), []int{7} } func (x *Image) GetImageData() []byte { @@ -439,7 +507,7 @@ type CriuLazyPagesRequest struct { func (x *CriuLazyPagesRequest) Reset() { *x = CriuLazyPagesRequest{} - mi := &file_node_proto_msgTypes[7] + mi := &file_node_proto_msgTypes[8] ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) ms.StoreMessageInfo(mi) } @@ -451,7 +519,7 @@ func (x *CriuLazyPagesRequest) String() string { func (*CriuLazyPagesRequest) ProtoMessage() {} func (x *CriuLazyPagesRequest) ProtoReflect() protoreflect.Message { - mi := &file_node_proto_msgTypes[7] + mi := &file_node_proto_msgTypes[8] if x != nil { ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) if ms.LoadMessageInfo() == nil { @@ -464,7 +532,7 @@ func (x *CriuLazyPagesRequest) ProtoReflect() protoreflect.Message { // Deprecated: Use CriuLazyPagesRequest.ProtoReflect.Descriptor instead. func (*CriuLazyPagesRequest) Descriptor() ([]byte, []int) { - return file_node_proto_rawDescGZIP(), []int{7} + return file_node_proto_rawDescGZIP(), []int{8} } func (x *CriuLazyPagesRequest) GetCheckpointPath() string { @@ -504,7 +572,7 @@ type PullImageRequest struct { func (x *PullImageRequest) Reset() { *x = PullImageRequest{} - mi := &file_node_proto_msgTypes[8] + mi := &file_node_proto_msgTypes[9] ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) ms.StoreMessageInfo(mi) } @@ -516,7 +584,7 @@ func (x *PullImageRequest) String() string { func (*PullImageRequest) ProtoMessage() {} func (x *PullImageRequest) ProtoReflect() protoreflect.Message { - mi := &file_node_proto_msgTypes[8] + mi := &file_node_proto_msgTypes[9] if x != nil { ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) if ms.LoadMessageInfo() == nil { @@ -529,7 +597,7 @@ func (x *PullImageRequest) ProtoReflect() protoreflect.Message { // Deprecated: Use PullImageRequest.ProtoReflect.Descriptor instead. func (*PullImageRequest) Descriptor() ([]byte, []int) { - return file_node_proto_rawDescGZIP(), []int{8} + return file_node_proto_rawDescGZIP(), []int{9} } func (x *PullImageRequest) GetImageId() string { @@ -548,7 +616,7 @@ type RestoreCapacityRequest struct { func (x *RestoreCapacityRequest) Reset() { *x = RestoreCapacityRequest{} - mi := &file_node_proto_msgTypes[9] + mi := &file_node_proto_msgTypes[10] ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) ms.StoreMessageInfo(mi) } @@ -560,7 +628,7 @@ func (x *RestoreCapacityRequest) String() string { func (*RestoreCapacityRequest) ProtoMessage() {} func (x *RestoreCapacityRequest) ProtoReflect() protoreflect.Message { - mi := &file_node_proto_msgTypes[9] + mi := &file_node_proto_msgTypes[10] if x != nil { ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) if ms.LoadMessageInfo() == nil { @@ -573,7 +641,7 @@ func (x *RestoreCapacityRequest) ProtoReflect() protoreflect.Message { // Deprecated: Use RestoreCapacityRequest.ProtoReflect.Descriptor instead. func (*RestoreCapacityRequest) Descriptor() ([]byte, []int) { - return file_node_proto_rawDescGZIP(), []int{9} + return file_node_proto_rawDescGZIP(), []int{10} } func (x *RestoreCapacityRequest) GetPodInfo() *PodInfo { @@ -593,7 +661,7 @@ type RestoreCapacityResponse struct { func (x *RestoreCapacityResponse) Reset() { *x = RestoreCapacityResponse{} - mi := &file_node_proto_msgTypes[10] + mi := &file_node_proto_msgTypes[11] ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) ms.StoreMessageInfo(mi) } @@ -605,7 +673,7 @@ func (x *RestoreCapacityResponse) String() string { func (*RestoreCapacityResponse) ProtoMessage() {} func (x *RestoreCapacityResponse) ProtoReflect() protoreflect.Message { - mi := &file_node_proto_msgTypes[10] + mi := &file_node_proto_msgTypes[11] if x != nil { ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) if ms.LoadMessageInfo() == nil { @@ -618,7 +686,7 @@ func (x *RestoreCapacityResponse) ProtoReflect() protoreflect.Message { // Deprecated: Use RestoreCapacityResponse.ProtoReflect.Descriptor instead. func (*RestoreCapacityResponse) Descriptor() ([]byte, []int) { - return file_node_proto_rawDescGZIP(), []int{10} + return file_node_proto_rawDescGZIP(), []int{11} } func (x *RestoreCapacityResponse) GetAllowed() bool { @@ -650,13 +718,17 @@ const file_node_proto_rawDesc = "" + "\bpod_info\x18\x01 \x01(\v2\x18.zeropod.node.v1.PodInfoR\apodInfo\x12E\n" + "\x0emigration_info\x18\x02 \x01(\v2\x1e.zeropod.node.v1.MigrationInfoR\rmigrationInfo\"X\n" + "\x0fRestoreResponse\x12E\n" + - "\x0emigration_info\x18\x01 \x01(\v2\x1e.zeropod.node.v1.MigrationInfoR\rmigrationInfo\"\x88\x01\n" + + "\x0emigration_info\x18\x01 \x01(\v2\x1e.zeropod.node.v1.MigrationInfoR\rmigrationInfo\"8\n" + + "\bListener\x12\x12\n" + + "\x04port\x18\x01 \x01(\x05R\x04port\x12\x18\n" + + "\anetwork\x18\x02 \x01(\tR\anetwork\"\xc1\x01\n" + "\aPodInfo\x12\x12\n" + "\x04name\x18\x01 \x01(\tR\x04name\x12\x1c\n" + "\tnamespace\x18\x02 \x01(\tR\tnamespace\x12%\n" + "\x0econtainer_name\x18\x03 \x01(\tR\rcontainerName\x12\x14\n" + "\x05ports\x18\x04 \x03(\x05R\x05ports\x12\x0e\n" + - "\x02ip\x18\x05 \x01(\tR\x02ip\"\xbd\x02\n" + + "\x02ip\x18\x05 \x01(\tR\x02ip\x127\n" + + "\tlisteners\x18\x06 \x03(\v2\x19.zeropod.node.v1.ListenerR\tlisteners\"\xf6\x02\n" + "\rMigrationInfo\x12\x19\n" + "\bimage_id\x18\x01 \x01(\tR\aimageId\x12\x1d\n" + "\n" + @@ -666,7 +738,8 @@ const file_node_proto_rawDesc = "" + "\rrestore_start\x18\x05 \x01(\v2\x1a.google.protobuf.TimestampR\frestoreStart\x12;\n" + "\vrestore_end\x18\x06 \x01(\v2\x1a.google.protobuf.TimestampR\n" + "restoreEnd\x12\x14\n" + - "\x05ports\x18\a \x03(\x05R\x05ports\"%\n" + + "\x05ports\x18\a \x03(\x05R\x05ports\x127\n" + + "\tlisteners\x18\b \x03(\v2\x19.zeropod.node.v1.ListenerR\tlisteners\"%\n" + "\x05Image\x12\x1c\n" + "\timageData\x18\x01 \x01(\fR\timageData\"\x7f\n" + "\x14CriuLazyPagesRequest\x12'\n" + @@ -702,52 +775,55 @@ func file_node_proto_rawDescGZIP() []byte { return file_node_proto_rawDescData } -var file_node_proto_msgTypes = make([]protoimpl.MessageInfo, 11) +var file_node_proto_msgTypes = make([]protoimpl.MessageInfo, 12) var file_node_proto_goTypes = []any{ (*EvacRequest)(nil), // 0: zeropod.node.v1.EvacRequest (*EvacResponse)(nil), // 1: zeropod.node.v1.EvacResponse (*RestoreRequest)(nil), // 2: zeropod.node.v1.RestoreRequest (*RestoreResponse)(nil), // 3: zeropod.node.v1.RestoreResponse - (*PodInfo)(nil), // 4: zeropod.node.v1.PodInfo - (*MigrationInfo)(nil), // 5: zeropod.node.v1.MigrationInfo - (*Image)(nil), // 6: zeropod.node.v1.Image - (*CriuLazyPagesRequest)(nil), // 7: zeropod.node.v1.CriuLazyPagesRequest - (*PullImageRequest)(nil), // 8: zeropod.node.v1.PullImageRequest - (*RestoreCapacityRequest)(nil), // 9: zeropod.node.v1.RestoreCapacityRequest - (*RestoreCapacityResponse)(nil), // 10: zeropod.node.v1.RestoreCapacityResponse - (*emptypb.Empty)(nil), // 11: google.protobuf.Empty - (*timestamppb.Timestamp)(nil), // 12: google.protobuf.Timestamp + (*Listener)(nil), // 4: zeropod.node.v1.Listener + (*PodInfo)(nil), // 5: zeropod.node.v1.PodInfo + (*MigrationInfo)(nil), // 6: zeropod.node.v1.MigrationInfo + (*Image)(nil), // 7: zeropod.node.v1.Image + (*CriuLazyPagesRequest)(nil), // 8: zeropod.node.v1.CriuLazyPagesRequest + (*PullImageRequest)(nil), // 9: zeropod.node.v1.PullImageRequest + (*RestoreCapacityRequest)(nil), // 10: zeropod.node.v1.RestoreCapacityRequest + (*RestoreCapacityResponse)(nil), // 11: zeropod.node.v1.RestoreCapacityResponse + (*emptypb.Empty)(nil), // 12: google.protobuf.Empty + (*timestamppb.Timestamp)(nil), // 13: google.protobuf.Timestamp } var file_node_proto_depIdxs = []int32{ - 4, // 0: zeropod.node.v1.EvacRequest.pod_info:type_name -> zeropod.node.v1.PodInfo - 5, // 1: zeropod.node.v1.EvacRequest.migration_info:type_name -> zeropod.node.v1.MigrationInfo - 11, // 2: zeropod.node.v1.EvacResponse.empty:type_name -> google.protobuf.Empty - 4, // 3: zeropod.node.v1.RestoreRequest.pod_info:type_name -> zeropod.node.v1.PodInfo - 5, // 4: zeropod.node.v1.RestoreRequest.migration_info:type_name -> zeropod.node.v1.MigrationInfo - 5, // 5: zeropod.node.v1.RestoreResponse.migration_info:type_name -> zeropod.node.v1.MigrationInfo - 12, // 6: zeropod.node.v1.MigrationInfo.paused_at:type_name -> google.protobuf.Timestamp - 12, // 7: zeropod.node.v1.MigrationInfo.restore_start:type_name -> google.protobuf.Timestamp - 12, // 8: zeropod.node.v1.MigrationInfo.restore_end:type_name -> google.protobuf.Timestamp - 4, // 9: zeropod.node.v1.RestoreCapacityRequest.pod_info:type_name -> zeropod.node.v1.PodInfo - 0, // 10: zeropod.node.v1.Node.Evac:input_type -> zeropod.node.v1.EvacRequest - 0, // 11: zeropod.node.v1.Node.PrepareEvac:input_type -> zeropod.node.v1.EvacRequest - 2, // 12: zeropod.node.v1.Node.Restore:input_type -> zeropod.node.v1.RestoreRequest - 2, // 13: zeropod.node.v1.Node.FinishRestore:input_type -> zeropod.node.v1.RestoreRequest - 7, // 14: zeropod.node.v1.Node.NewCriuLazyPages:input_type -> zeropod.node.v1.CriuLazyPagesRequest - 8, // 15: zeropod.node.v1.Node.PullImage:input_type -> zeropod.node.v1.PullImageRequest - 9, // 16: zeropod.node.v1.Node.RestoreCapacity:input_type -> zeropod.node.v1.RestoreCapacityRequest - 1, // 17: zeropod.node.v1.Node.Evac:output_type -> zeropod.node.v1.EvacResponse - 1, // 18: zeropod.node.v1.Node.PrepareEvac:output_type -> zeropod.node.v1.EvacResponse - 3, // 19: zeropod.node.v1.Node.Restore:output_type -> zeropod.node.v1.RestoreResponse - 3, // 20: zeropod.node.v1.Node.FinishRestore:output_type -> zeropod.node.v1.RestoreResponse - 11, // 21: zeropod.node.v1.Node.NewCriuLazyPages:output_type -> google.protobuf.Empty - 6, // 22: zeropod.node.v1.Node.PullImage:output_type -> zeropod.node.v1.Image - 10, // 23: zeropod.node.v1.Node.RestoreCapacity:output_type -> zeropod.node.v1.RestoreCapacityResponse - 17, // [17:24] is the sub-list for method output_type - 10, // [10:17] is the sub-list for method input_type - 10, // [10:10] is the sub-list for extension type_name - 10, // [10:10] is the sub-list for extension extendee - 0, // [0:10] is the sub-list for field type_name + 5, // 0: zeropod.node.v1.EvacRequest.pod_info:type_name -> zeropod.node.v1.PodInfo + 6, // 1: zeropod.node.v1.EvacRequest.migration_info:type_name -> zeropod.node.v1.MigrationInfo + 12, // 2: zeropod.node.v1.EvacResponse.empty:type_name -> google.protobuf.Empty + 5, // 3: zeropod.node.v1.RestoreRequest.pod_info:type_name -> zeropod.node.v1.PodInfo + 6, // 4: zeropod.node.v1.RestoreRequest.migration_info:type_name -> zeropod.node.v1.MigrationInfo + 6, // 5: zeropod.node.v1.RestoreResponse.migration_info:type_name -> zeropod.node.v1.MigrationInfo + 4, // 6: zeropod.node.v1.PodInfo.listeners:type_name -> zeropod.node.v1.Listener + 13, // 7: zeropod.node.v1.MigrationInfo.paused_at:type_name -> google.protobuf.Timestamp + 13, // 8: zeropod.node.v1.MigrationInfo.restore_start:type_name -> google.protobuf.Timestamp + 13, // 9: zeropod.node.v1.MigrationInfo.restore_end:type_name -> google.protobuf.Timestamp + 4, // 10: zeropod.node.v1.MigrationInfo.listeners:type_name -> zeropod.node.v1.Listener + 5, // 11: zeropod.node.v1.RestoreCapacityRequest.pod_info:type_name -> zeropod.node.v1.PodInfo + 0, // 12: zeropod.node.v1.Node.Evac:input_type -> zeropod.node.v1.EvacRequest + 0, // 13: zeropod.node.v1.Node.PrepareEvac:input_type -> zeropod.node.v1.EvacRequest + 2, // 14: zeropod.node.v1.Node.Restore:input_type -> zeropod.node.v1.RestoreRequest + 2, // 15: zeropod.node.v1.Node.FinishRestore:input_type -> zeropod.node.v1.RestoreRequest + 8, // 16: zeropod.node.v1.Node.NewCriuLazyPages:input_type -> zeropod.node.v1.CriuLazyPagesRequest + 9, // 17: zeropod.node.v1.Node.PullImage:input_type -> zeropod.node.v1.PullImageRequest + 10, // 18: zeropod.node.v1.Node.RestoreCapacity:input_type -> zeropod.node.v1.RestoreCapacityRequest + 1, // 19: zeropod.node.v1.Node.Evac:output_type -> zeropod.node.v1.EvacResponse + 1, // 20: zeropod.node.v1.Node.PrepareEvac:output_type -> zeropod.node.v1.EvacResponse + 3, // 21: zeropod.node.v1.Node.Restore:output_type -> zeropod.node.v1.RestoreResponse + 3, // 22: zeropod.node.v1.Node.FinishRestore:output_type -> zeropod.node.v1.RestoreResponse + 12, // 23: zeropod.node.v1.Node.NewCriuLazyPages:output_type -> google.protobuf.Empty + 7, // 24: zeropod.node.v1.Node.PullImage:output_type -> zeropod.node.v1.Image + 11, // 25: zeropod.node.v1.Node.RestoreCapacity:output_type -> zeropod.node.v1.RestoreCapacityResponse + 19, // [19:26] is the sub-list for method output_type + 12, // [12:19] is the sub-list for method input_type + 12, // [12:12] is the sub-list for extension type_name + 12, // [12:12] is the sub-list for extension extendee + 0, // [0:12] is the sub-list for field type_name } func init() { file_node_proto_init() } @@ -761,7 +837,7 @@ func file_node_proto_init() { GoPackagePath: reflect.TypeOf(x{}).PkgPath(), RawDescriptor: unsafe.Slice(unsafe.StringData(file_node_proto_rawDesc), len(file_node_proto_rawDesc)), NumEnums: 0, - NumMessages: 11, + NumMessages: 12, NumExtensions: 0, NumServices: 1, }, diff --git a/api/node/v1/node.proto b/api/node/v1/node.proto index c41b32f..428e708 100644 --- a/api/node/v1/node.proto +++ b/api/node/v1/node.proto @@ -35,12 +35,18 @@ message RestoreResponse { MigrationInfo migration_info = 1; } +message Listener { + int32 port = 1; + string network = 2; +} + message PodInfo { string name = 1; string namespace = 2; string container_name = 3; repeated int32 ports = 4; string ip = 5; + repeated Listener listeners = 6; } message MigrationInfo { @@ -51,6 +57,7 @@ message MigrationInfo { google.protobuf.Timestamp restore_start = 5; google.protobuf.Timestamp restore_end = 6; repeated int32 ports = 7; + repeated Listener listeners = 8; } message Image { diff --git a/api/runtime/v1/types.go b/api/runtime/v1/types.go index 46e25b1..c98b808 100644 --- a/api/runtime/v1/types.go +++ b/api/runtime/v1/types.go @@ -53,6 +53,11 @@ type MigrationSpec struct { Containers []MigrationContainer `json:"containers"` } +type PodListener struct { + Port int32 `json:"port"` + Network string `json:"network"` +} + // +kubebuilder:object:generate:=true type MigrationContainer struct { Name string `json:"name"` @@ -65,6 +70,8 @@ type MigrationContainer struct { PageServer *MigrationServer `json:"pageServer,omitempty"` Ports []int32 `json:"ports,omitempty"` + + Listeners []PodListener `json:"listeners,omitempty"` } // +kubebuilder:object:generate:=true diff --git a/api/runtime/v1/zz_generated.deepcopy.go b/api/runtime/v1/zz_generated.deepcopy.go index 910808f..59e4939 100644 --- a/api/runtime/v1/zz_generated.deepcopy.go +++ b/api/runtime/v1/zz_generated.deepcopy.go @@ -69,6 +69,11 @@ func (in *MigrationContainer) DeepCopyInto(out *MigrationContainer) { *out = make([]int32, len(*in)) copy(*out, *in) } + if in.Listeners != nil { + in, out := &in.Listeners, &out.Listeners + *out = make([]PodListener, len(*in)) + copy(*out, *in) + } } // DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new MigrationContainer. diff --git a/config/crds/runtime.zeropod.ctrox.dev_migrations.yaml b/config/crds/runtime.zeropod.ctrox.dev_migrations.yaml index 957d7f2..5061cfa 100644 --- a/config/crds/runtime.zeropod.ctrox.dev_migrations.yaml +++ b/config/crds/runtime.zeropod.ctrox.dev_migrations.yaml @@ -68,6 +68,19 @@ spec: - host - port type: object + listeners: + items: + properties: + network: + type: string + port: + format: int32 + type: integer + required: + - network + - port + type: object + type: array name: type: string pageServer: diff --git a/manager/node/service.go b/manager/node/service.go index 68c9971..61c0829 100644 --- a/manager/node/service.go +++ b/manager/node/service.go @@ -440,11 +440,16 @@ func (ns *nodeService) Restore(ctx context.Context, req *nodev1.RestoreRequest) } } + listeners := []*nodev1.Listener{} + for _, ln := range container.Listeners { + listeners = append(listeners, &nodev1.Listener{Port: ln.Port, Network: ln.Network}) + } return &nodev1.RestoreResponse{ MigrationInfo: &nodev1.MigrationInfo{ ImageId: req.MigrationInfo.ImageId, LiveMigration: migration.Spec.LiveMigration, Ports: container.Ports, + Listeners: listeners, }, }, nil } @@ -784,6 +789,11 @@ func (ns *nodeService) Evac(ctx context.Context, req *nodev1.EvacRequest) (*node } mc.PageServer = pageServer mc.Ports = req.PodInfo.Ports + listeners := []v1.PodListener{} + for _, ln := range req.PodInfo.Listeners { + listeners = append(listeners, v1.PodListener{Port: ln.Port, Network: ln.Network}) + } + mc.Listeners = listeners log.Debug("found our container, setting migration servers") }); !found { return false, fmt.Errorf("migration does not have image for requested container %s", req.PodInfo.ContainerName) diff --git a/shim/container.go b/shim/container.go index be60e30..3701989 100644 --- a/shim/container.go +++ b/shim/container.go @@ -31,6 +31,11 @@ import ( type HandleStartedFunc func(*runc.Container, process.Process) +type startInfo struct { + skip bool + listeners reuse.Listeners +} + type Container struct { *runc.Container // mutex to lock during checkpoint/restore operations to ensure we don't try @@ -47,7 +52,7 @@ type Container struct { cgroup any logPath string scaledDown bool - skipStart bool + startInfo startInfo netNS ns.NetNS scaleDownTimer *time.Timer initTimer *time.Timer @@ -275,12 +280,12 @@ func (c *Container) sendFailEvent(phase v1.ContainerPhase, l string) { c.sendEvent(status) } -func (c *Container) SetSkipStart(skip bool) { - c.skipStart = skip +func (c *Container) SetSkipStart(startInfo startInfo) { + c.startInfo = startInfo } func (c *Container) SkipStart() bool { - return c.skipStart + return c.startInfo.skip } func (c *Container) Status() *v1.ContainerStatus { @@ -515,7 +520,7 @@ func (c *Container) startActivator(ctx context.Context, ports ...uint16) error { // return err // } - if err := c.activator.Start(c.context, c.Pid(), ports, c.skipStart); err != nil { + if err := c.activator.Start(c.context, c.Pid(), c.startInfo.listeners, c.SkipStart()); err != nil { if errors.Is(err, activator.ErrMapNotFound) { return err } diff --git a/shim/evac.go b/shim/evac.go index a670e36..2acc004 100644 --- a/shim/evac.go +++ b/shim/evac.go @@ -203,12 +203,20 @@ func (c *Container) evacScaledDown(ctx context.Context) error { for _, p := range c.cfg.Ports { ports = append(ports, int32(p)) } + listeners := []*nodev1.Listener{} + for _, ln := range c.activator.GetListeners() { + listeners = append(listeners, &nodev1.Listener{ + Port: int32(ln.Port), + Network: string(ln.Network), + }) + } evacReq := &nodev1.EvacRequest{ PodInfo: &nodev1.PodInfo{ Name: c.cfg.PodName, Namespace: c.cfg.PodNamespace, ContainerName: c.cfg.ContainerName, Ports: ports, + Listeners: listeners, }, MigrationInfo: &nodev1.MigrationInfo{ LiveMigration: false, diff --git a/shim/restore.go b/shim/restore.go index 2745b4f..8b2737c 100644 --- a/shim/restore.go +++ b/shim/restore.go @@ -23,6 +23,7 @@ import ( "github.com/containerd/ttrpc" "github.com/containernetworking/plugins/pkg/ns" "github.com/ctrox/zeropod/activator" + "github.com/ctrox/zeropod/activator/reuse" nodev1 "github.com/ctrox/zeropod/api/node/v1" v1 "github.com/ctrox/zeropod/api/shim/v1" crio "github.com/ctrox/zeropod/shim/io" @@ -226,10 +227,10 @@ func createContainerLoggers(ctx context.Context, logPath string, tty bool) (stdo // MigrationRestore requests a restore from the node. If a matching migration is // found, it sets the Checkpoint path in the CreateTaskRequest. -func MigrationRestore(ctx context.Context, r *task.CreateTaskRequest, cfg *v1.Config) (skipStart bool, err error) { +func MigrationRestore(ctx context.Context, r *task.CreateTaskRequest, cfg *v1.Config) (startInfo, error) { conn, err := net.Dial("unix", nodev1.SocketPath) if err != nil { - return false, fmt.Errorf("%w: dialing node service: %w", ErrRestoreDial, err) + return startInfo{}, fmt.Errorf("%w: dialing node service: %w", ErrRestoreDial, err) } log.G(ctx).Infof("creating restore request for container: %s", cfg.ContainerName) @@ -254,7 +255,7 @@ func MigrationRestore(ctx context.Context, r *task.CreateTaskRequest, cfg *v1.Co defer conn.Close() resp, err := nodeClient.Restore(ctx, restoreReq) if err != nil { - return false, fmt.Errorf("%w: %w", ErrRestoreRequestFailed, err) + return startInfo{}, fmt.Errorf("%w: %w", ErrRestoreRequestFailed, err) } if len(cfg.Ports) == 0 { for _, p := range resp.MigrationInfo.Ports { @@ -265,7 +266,7 @@ func MigrationRestore(ctx context.Context, r *task.CreateTaskRequest, cfg *v1.Co log.G(ctx).Infof("restore response: %v", resp.MigrationInfo) if err := validateCheckpointData(nodev1.SnapshotPath(resp.MigrationInfo.ImageId)); err != nil { - return false, fmt.Errorf("%w: %w", ErrInvalidCheckpoint, err) + return startInfo{}, fmt.Errorf("%w: %w", ErrInvalidCheckpoint, err) } r.Checkpoint = nodev1.SnapshotPath(resp.MigrationInfo.ImageId) log.G(ctx).Infof("setting checkpoint dir for restore: %s", r.Checkpoint) @@ -274,12 +275,15 @@ func MigrationRestore(ctx context.Context, r *task.CreateTaskRequest, cfg *v1.Co // socket needs to be there) and also so the restore stats are stored in the // image directory. if err := setCriuWorkPath(r, r.Checkpoint); err != nil { - return false, err + return startInfo{}, err } if !resp.MigrationInfo.LiveMigration { - skipStart = true - return + listeners := reuse.Listeners{} + for _, ln := range resp.MigrationInfo.Listeners { + listeners = append(listeners, reuse.Listener{Port: uint16(ln.Port), Network: reuse.Network(ln.Network)}) + } + return startInfo{skip: true, listeners: listeners}, nil } // wait for the lazy pages socket file to exist to ensure the pages @@ -287,10 +291,10 @@ func MigrationRestore(ctx context.Context, r *task.CreateTaskRequest, cfg *v1.Co if err := waitForLazyPagesSocket(ctx, r.Checkpoint, time.Second); err != nil { log.G(ctx).Errorf("aborting restore: %s", err) r.Checkpoint = "" - return false, nil + return startInfo{}, nil } - return false, nil + return startInfo{}, nil } // waitForLazyPagesSocket waits until the lazy-pages.socket file exists in the From 4a3ca8e1801c23ecbcc0d0d44e044fe01bddf187 Mon Sep 17 00:00:00 2001 From: Cyrill Troxler Date: Sun, 2 Aug 2026 17:54:17 +0200 Subject: [PATCH 08/17] test: reuse activator --- activator/activator_test.go | 6 +- activator/reuse/activator.go | 8 +- activator/reuse/activator_test.go | 348 ++++++++++++++++++++++++++++++ activator/reuse/forward.go | 10 +- activator/reuse/listener.go | 33 ++- shim/container.go | 28 ++- shim/restore.go | 4 +- 7 files changed, 412 insertions(+), 25 deletions(-) create mode 100644 activator/reuse/activator_test.go diff --git a/activator/activator_test.go b/activator/activator_test.go index 0a42b23..7fe3488 100644 --- a/activator/activator_test.go +++ b/activator/activator_test.go @@ -244,12 +244,12 @@ func startServer(t *testing.T, ctx context.Context, s *Server, port uint16, tc * err := s.Start( ctx, tc.connHook, - func() error { + func() (int, error) { if tc.loopConnection { loopIterations += 1 if loopIterations > 10 { t.Error("loop detection failed") - return fmt.Errorf("loop detection failed") + return 0, fmt.Errorf("loop detection failed") } // return nil } @@ -280,7 +280,7 @@ func startServer(t *testing.T, ctx context.Context, s *Server, port uint16, tc * ts.Close() }) }) - return nil + return 0, nil }, port, ) diff --git a/activator/reuse/activator.go b/activator/reuse/activator.go index 73823fe..9b57dee 100644 --- a/activator/reuse/activator.go +++ b/activator/reuse/activator.go @@ -28,9 +28,9 @@ import ( type Network string const ( - networkTCP4 Network = "tcp4" - networkTCPAny Network = "tcp" - networkTCP6ONLY Network = "tcp6" + NetworkTCP4 Network = "tcp4" + NetworkTCPAny Network = "tcp" + NetworkTCP6ONLY Network = "tcp6" ) type Activator struct { @@ -398,7 +398,7 @@ func (act *Activator) wake(network Network) error { func (act *Activator) poke(port uint16, network Network) error { return act.ns.Do(func(nn ns.NetNS) error { addr := fmt.Sprintf("127.0.0.1:%d", port) - if network == networkTCPAny || network == networkTCP6ONLY { + if network == NetworkTCPAny || network == NetworkTCP6ONLY { addr = fmt.Sprintf("[::1]:%d", port) } dialer := net.Dialer{Timeout: time.Second} diff --git a/activator/reuse/activator_test.go b/activator/reuse/activator_test.go new file mode 100644 index 0000000..5f50d59 --- /dev/null +++ b/activator/reuse/activator_test.go @@ -0,0 +1,348 @@ +package reuse + +import ( + "context" + "encoding/json" + "fmt" + "io" + "net" + "net/http" + "net/http/httptest" + "net/netip" + "os" + "os/exec" + "sync" + "syscall" + "testing" + "time" + + "github.com/containerd/log" + "github.com/containernetworking/plugins/pkg/ns" + "github.com/ctrox/zeropod/activator" + "github.com/stretchr/testify/assert" + "github.com/stretchr/testify/require" + "k8s.io/utils/ptr" +) + +type testCase struct { + parallelReqs int + expectedBody string + expectedCode int + expectLastActivity bool + ipv6 bool + trackerIgnoreLocalhost bool + kubeletAddr *netip.Addr + forwardToFunc func(t *testing.T, port int) (string, *httptest.Server) +} + +func TestReuseActivator(t *testing.T) { + if os.Getenv("IN_NET_PID_NS") == "1" { + listen(t) + return + } + + require.NoError(t, activator.MountBPFFS(activator.BPFFSPath)) + nn, err := ns.GetCurrentNS() + require.NoError(t, err) + + c := &http.Client{ + Timeout: time.Second, + Transport: &http.Transport{ + DisableKeepAlives: true, + }, + } + + tests := map[string]testCase{ + "ipv4": { + parallelReqs: 1, + expectedBody: "app", + expectedCode: http.StatusOK, + expectLastActivity: true, + }, + "ipv6": { + parallelReqs: 1, + expectedBody: "app", + expectedCode: http.StatusOK, + ipv6: true, + expectLastActivity: true, + }, + "100 in parallel": { + parallelReqs: 100, + expectedBody: "app", + expectedCode: http.StatusOK, + expectLastActivity: true, + }, + "ignore activity from localhost v4": { + parallelReqs: 1, + expectedBody: "app", + expectedCode: http.StatusOK, + ipv6: false, + expectLastActivity: false, + trackerIgnoreLocalhost: true, + }, + "ignore activity from localhost v6": { + parallelReqs: 1, + expectedBody: "app", + expectedCode: http.StatusOK, + ipv6: true, + expectLastActivity: false, + trackerIgnoreLocalhost: true, + }, + "ignore kubelet traffic ipv4": { + parallelReqs: 1, + expectedBody: "ok\n", + expectedCode: http.StatusOK, + ipv6: false, + expectLastActivity: false, + kubeletAddr: ptr.To(netip.MustParseAddr("127.0.0.1")), + }, + "ignore kubelet traffic ipv6": { + parallelReqs: 1, + expectedBody: "ok\n", + expectedCode: http.StatusOK, + ipv6: true, + expectLastActivity: false, + kubeletAddr: ptr.To(netip.MustParseAddr("::1")), + }, + "forward": { + parallelReqs: 1, + expectedBody: "hello from another server", + expectedCode: http.StatusOK, + expectLastActivity: true, + forwardToFunc: func(t *testing.T, port int) (string, *httptest.Server) { + ts := httptest.NewUnstartedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + fmt.Fprint(w, "hello from another server") + })) + // usually forwarding happens to a different pod IP, to simulate + // that we just use a different localhost IP + l, err := net.Listen("tcp4", fmt.Sprintf("127.0.0.2:%d", port)) + if err != nil { + t.Fatal(err) + } + ts.Listener.Close() + ts.Listener = l + ts.Start() + return "127.0.0.2", ts + }, + }, + } + wg := sync.WaitGroup{} + for name, tc := range tests { + t.Run(name, func(t *testing.T) { + defer checkFDLeaks(t)() + port, err := freePort() + require.NoError(t, err) + once := &sync.Once{} + require.NoError(t, log.SetLevel(log.DebugLevel.String())) + ctx, cancel := context.WithCancel(t.Context()) + + s, err := New( + ctx, nn, "/sys/fs/cgroup", + ) + require.NoError(t, err) + + pid, err := runApp(t, tc, once, port) + require.NoError(t, err) + + require.NoError(t, s.Reload( + ProbeAddr(tc.kubeletAddr), + TrackerIgnoreLocalhost(tc.trackerIgnoreLocalhost), + // TODO: not sure why but the socket migration breaks when we + // run the app in the hook itself + RestoreHook(func() (int, error) { return pid, nil }), + )) + + t.Cleanup(func() { + cancel() + }) + + network := NetworkTCP4 + if tc.ipv6 { + network = NetworkTCP6ONLY + } + require.NoError(t, s.Start(ctx, os.Getpid(), Listeners{{Port: uint16(port), Network: network}}, true)) + if tc.forwardToFunc != nil { + addr, ts := tc.forwardToFunc(t, port) + defer ts.Close() + assert.NoError(t, s.ForwardToTarget(ctx, addr)) + assert.NoError(t, s.Reload(RestoreHook(func() (int, error) { return 0, nil }))) + } + + for i := 0; i < tc.parallelReqs; i++ { + wg.Go(func() { + host := "127.0.0.1" + if tc.ipv6 { + host = "[::1]" + } + + req, err := http.NewRequest(http.MethodGet, fmt.Sprintf("http://%s:%d", host, port), nil) + if !assert.NoError(t, err) { + return + } + resp, err := c.Do(req) + if !assert.NoError(t, err) { + return + } + + b, err := io.ReadAll(resp.Body) + if !assert.NoError(t, err) { + return + } + + assert.Equal(t, tc.expectedCode, resp.StatusCode) + assert.Equal(t, tc.expectedBody, string(b)) + t.Log(string(b)) + }) + } + wg.Wait() + var key uint32 + var val uint64 + count := 0 + iter := s.trackerObjs.SocketTracker.Iterate() + for iter.Next(&key, &val) { + t.Logf("found %d: %d", key, val) + count++ + } + assert.Equal(t, 1, count, "one element in socket tracker map") + last, err := s.LastActivity(uint16(port)) + if tc.expectLastActivity { + assert.NoError(t, err) + assert.Less(t, time.Since(last), time.Second) + } else { + assert.Error(t, err) + assert.ErrorIs(t, err, activator.NoActivityRecordedErr{}) + } + cancel() + s.Stop() + }) + } +} + +func runApp(t *testing.T, tc testCase, once *sync.Once, port int) (int, error) { + cmd := exec.Command(os.Args[0], "-test.run=^TestReuseActivator$") + once.Do(func() { + network := "tcp4" + if tc.ipv6 { + network = "tcp6" + } + + cmd.Env = append( + os.Environ(), + "IN_NET_PID_NS=1", + fmt.Sprintf("NETWORK=%s", network), + fmt.Sprintf("ADDRESS=:%d", port), + fmt.Sprintf("PORT=%d", port), + fmt.Sprintf("RESPONSE=%s", "app"), + "GODEBUG=multipathtcp=0", + ) + cmd.Stdout = os.Stdout + cmd.Stderr = os.Stderr + + cmd.SysProcAttr = &syscall.SysProcAttr{ + Cloneflags: syscall.CLONE_NEWPID, + } + r, w, err := os.Pipe() + if err != nil { + t.Fatalf("failed to create pipe: %v", err) + } + defer r.Close() + cmd.ExtraFiles = []*os.File{w} + + require.NoError(t, cmd.Start()) + t.Cleanup(func() { + cmd.Process.Kill() + cmd.Wait() + }) + ready := make(chan struct{}) + go func() { + buf := make([]byte, 1) + r.Read(buf) + close(ready) + }() + <-ready + }) + t.Logf("using pid %d", cmd.Process.Pid) + return cmd.Process.Pid, nil +} + +func freePort() (int, error) { + listener, err := net.Listen("tcp", ":0") + if err != nil { + return 0, err + } + + addr, ok := listener.Addr().(*net.TCPAddr) + if !ok { + return 0, fmt.Errorf("addr is not a net.TCPAddr: %T", listener.Addr()) + } + + if err := listener.Close(); err != nil { + return 0, err + } + + return addr.Port, nil +} + +func listen(t *testing.T) { + ln, err := net.Listen(os.Getenv("NETWORK"), os.Getenv("ADDRESS")) + if err != nil { + t.Fatalf("create listener in isolated netns: %v", err) + } + defer ln.Close() + fmt.Printf("listening on %s %s inside PID %d\n", ln.Addr(), os.Getenv("NETWORK"), os.Getpid()) + pipe := os.NewFile(3, "pipe") + if pipe != nil { + pipe.Write([]byte{1}) + pipe.Close() + } + http.Serve(ln, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + fmt.Fprint(w, os.Getenv("RESPONSE")) + })) +} + +func checkFDLeaks(t *testing.T) func() { + t.Helper() + before := getFDs(t) + + return func() { + t.Helper() + after := getFDs(t) + + if len(after) > len(before) { + b, err := json.MarshalIndent(diff(before, after), "", " ") + assert.NoError(t, err) + t.Errorf("file descriptor leak detected! Before: %d, After: %d\nLeaked FDs: %s", + len(before), len(after), b) + } + } +} + +func getFDs(t *testing.T) map[string]string { + t.Helper() + + fdDir := "/proc/self/fd" + entries, err := os.ReadDir(fdDir) + if err != nil { + t.Fatalf("failed to read open FDs: %v", err) + } + + fds := make(map[string]string, len(entries)) + for _, entry := range entries { + target, err := os.Readlink(fdDir + "/" + entry.Name()) + if err != nil { + target = "unknown" + } + fds[entry.Name()] = target + } + return fds +} + +func diff(before, after map[string]string) map[string]string { + leaked := make(map[string]string) + for fd, target := range after { + if _, ok := before[fd]; !ok { + leaked[fd] = target + } + } + return leaked +} diff --git a/activator/reuse/forward.go b/activator/reuse/forward.go index c70187d..0d4f89b 100644 --- a/activator/reuse/forward.go +++ b/activator/reuse/forward.go @@ -33,10 +33,11 @@ func (act *Activator) ForwardToTarget(ctx context.Context, addr string) error { for k, wl := range act.wakeListeners { fwd := &forwarder{ targetAddr: addr, - log: act.log, + log: act.log.WithField("component", "forwarder"), ns: act.ns, // TODO: parameter connectTimeout: time.Minute, + quit: make(chan struct{}, 1), } if err := act.ns.Do(func(nn ns.NetNS) error { ln, err := listenReuseport(k.port, k.network) @@ -74,19 +75,20 @@ func (fwd *forwarder) serveForward(ctx context.Context, listener net.Listener, p // TODO: we need this again? Or can we just use ctx? case <-fwd.quit: wg.Wait() + fwd.log.Debug("quit") return case <-ctx.Done(): wg.Wait() + fwd.log.Debug("context closed") return default: if !errors.Is(err, net.ErrClosed) { fwd.log.Errorf("error accepting: %s", err) } - return } } else { wg.Go(func() { - fwd.log.Debug("forwarder: accepting connection") + fwd.log.Debugf("accepting connection from %s", conn.RemoteAddr()) fwd.handleForwardConn(ctx, conn, port) }) } @@ -121,7 +123,7 @@ func (fwd *forwarder) connect(ctx context.Context, port uint16, addr string) (ne // if we dial a remote target we want a smaller timeout as we might run // into an io timeout instead of connection refused dialer.Timeout = time.Millisecond * 10 - fwd.log.Debugf("forwarder: connecting to target address %s", targetAddr.String()) + fwd.log.Debugf("connecting to target address %s", targetAddr.String()) ticker := time.NewTicker(time.Millisecond) defer ticker.Stop() diff --git a/activator/reuse/listener.go b/activator/reuse/listener.go index f9b34dd..5070a35 100644 --- a/activator/reuse/listener.go +++ b/activator/reuse/listener.go @@ -92,6 +92,12 @@ func (act *Activator) listenWake(port uint16, network Network, wl *wakeListener) } wl.epollFd = epfd + var stat syscall.Stat_t + if err := syscall.Fstat(int(wl.lnFd.Fd()), &stat); err != nil { + return err + } + act.wakeInodes = append(act.wakeInodes, stat.Ino) + go act.watchWake(epfd, wl.lnFd.Fd(), network) return nil } @@ -245,6 +251,24 @@ func (act *Activator) listenerFds(pid int) ([]listener, error) { if err != nil { continue } + + // TODO: dry this + sockaddr, err := unix.Getsockname(fd) + if err != nil { + _ = unix.Close(fd) + continue + } + var port int + switch sa := sockaddr.(type) { + case *unix.SockaddrInet4: + port = sa.Port + case *unix.SockaddrInet6: + port = sa.Port + } + if listener.port != uint16(port) { + _ = unix.Close(fd) + continue + } network, err := getNetworkFromSock(fd) if err != nil { _ = unix.Close(fd) @@ -267,17 +291,16 @@ func getNetworkFromSock(fd int) (Network, error) { } if domain == unix.AF_INET6 { if v, err := unix.GetsockoptInt(fd, unix.IPPROTO_IPV6, unix.IPV6_V6ONLY); err == nil && v == 1 { - return networkTCP6ONLY, nil + return NetworkTCP6ONLY, nil } - return networkTCPAny, nil + return NetworkTCPAny, nil } - return networkTCP4, nil + return NetworkTCP4, nil } // attachListener attaches select_or_migrate to the listeners reuseport group // and puts it into the key slot. -func (act *Activator) attachListener(key uint32, lnFd uintptr, bpfMap *ebpf.Map, - prog *ebpf.Program) error { +func (act *Activator) attachListener(key uint32, lnFd uintptr, bpfMap *ebpf.Map, prog *ebpf.Program) error { if err := unix.SetsockoptInt(int(lnFd), unix.SOL_SOCKET, unix.SO_ATTACH_REUSEPORT_EBPF, prog.FD()); err != nil { return fmt.Errorf("attach reuseport prog: %w", err) diff --git a/shim/container.go b/shim/container.go index 3701989..0b203c9 100644 --- a/shim/container.go +++ b/shim/container.go @@ -123,7 +123,7 @@ func (c *Container) Register(ctx context.Context, container *runc.Container) err c.process = p c.initialProcess = p - if err := c.initActivator(ctx, c.SkipStart()); err != nil { + if err := c.initActivator(ctx); err != nil { log.G(ctx).Warnf("activator init failed, disabling scale down: %s", err) c.cfg.ScaleDownDuration = 0 } @@ -432,7 +432,7 @@ func (c *Container) activatorOpts(ctx context.Context) []reuse.Option { return opts } -func (c *Container) initActivator(ctx context.Context, enableRedirects bool) error { +func (c *Container) initActivator(ctx context.Context) error { c.cancelInit() if c.activator == nil { @@ -458,7 +458,7 @@ func (c *Container) initActivator(ctx context.Context, enableRedirects bool) err // ports might fail in various ways. We schedule a retry. retryIn := c.initRetry() log.G(ctx).Infof("no ports detected, retrying init in %s", retryIn) - c.retryInitIn(retryIn, enableRedirects) + c.retryInitIn(retryIn) return nil } @@ -468,14 +468,15 @@ func (c *Container) initActivator(ctx context.Context, enableRedirects bool) err log.G(ctx).Infof("starting activator with ports: %v", c.cfg.Ports) if err := c.startActivator(ctx, c.cfg.Ports...); err != nil { if errors.Is(err, activator.ErrMapNotFound) || errors.Is(err, reuse.ErrNoListeningSockets) { - c.retryInitIn(c.initRetry(), enableRedirects) + c.retryInitIn(c.initRetry()) return nil } return err } - if enableRedirects { - return c.activator.ScaleDown() + if c.startInfo.skip { + // this is no longer needed with the new activator + // return c.activator.ScaleDown() } return nil } @@ -493,10 +494,10 @@ func (c *Container) initRetry() time.Duration { return c.initBackoff } -func (c *Container) retryInitIn(in time.Duration, enableRedirects bool) { +func (c *Container) retryInitIn(in time.Duration) { log.G(c.context).Infof("scheduling init in %s", in) timer := time.AfterFunc(in, func() { - if err := c.initActivator(c.context, enableRedirects); err != nil { + if err := c.initActivator(c.context); err != nil { log.G(c.context).Warnf("error initializing activator: %s", err) } }) @@ -519,6 +520,17 @@ func (c *Container) startActivator(ctx context.Context, ports ...uint16) error { // log.G(ctx).WithError(err).Error("failed to attach activator") // return err // } + if len(c.startInfo.listeners) == 0 { + for _, port := range ports { + c.startInfo.listeners = append( + c.startInfo.listeners, + // if startInfo was empty, we fall back to tcp4/tcp6 combo + // TODO: we could also try and read it from the checkpoint image + reuse.Listener{Port: port, Network: reuse.NetworkTCP4}, + reuse.Listener{Port: port, Network: reuse.NetworkTCP6ONLY}, + ) + } + } if err := c.activator.Start(c.context, c.Pid(), c.startInfo.listeners, c.SkipStart()); err != nil { if errors.Is(err, activator.ErrMapNotFound) { diff --git a/shim/restore.go b/shim/restore.go index 8b2737c..450d749 100644 --- a/shim/restore.go +++ b/shim/restore.go @@ -58,7 +58,9 @@ func (c *Container) Restore(ctx context.Context) (*runc.Container, process.Proce log.G(ctx).WithError(err).Error("requesting restore capacity") } else if !resp.Allowed { if resp.RedirectAddr != "" { - c.activator.ForwardToTarget(ctx, resp.RedirectAddr) + if err := c.activator.ForwardToTarget(ctx, resp.RedirectAddr); err != nil { + return nil, nil, err + } } return nil, nil, ErrNoCapacity } From 26c2aadd980151aaad571c37933f1e51c23f4cf2 Mon Sep 17 00:00:00 2001 From: Cyrill Troxler Date: Thu, 6 Aug 2026 18:01:39 +0200 Subject: [PATCH 09/17] refactor: listenerGroup instead of separate maps --- activator/reuse/activator.go | 66 ++++++++++++++---------------------- activator/reuse/forward.go | 10 +++--- activator/reuse/listener.go | 23 ++++++++----- 3 files changed, 47 insertions(+), 52 deletions(-) diff --git a/activator/reuse/activator.go b/activator/reuse/activator.go index 9b57dee..eb1929a 100644 --- a/activator/reuse/activator.go +++ b/activator/reuse/activator.go @@ -37,10 +37,7 @@ type Activator struct { *Config ports []uint16 mu sync.Mutex - wakeListeners map[listenerKey]*wakeListener - probeListeners map[listenerKey]*probeListener - appListeners map[listenerKey]*appListener - forwarder map[listenerKey]*forwarder + listeners map[listenerKey]*listenerGroup wakeInodes []uint64 log *log.Entry ns ns.NetNS @@ -65,15 +62,12 @@ func New(ctx context.Context, ns ns.NetNS, cgroupsPath string, opts ...Option) ( opt(cfg) } act := &Activator{ - ns: ns, - cgroupsPath: cgroupsPath, - log: log.GetLogger(ctx), - sandboxPid: parsePidFromNetNS(ns), - wakeListeners: make(map[listenerKey]*wakeListener), - appListeners: make(map[listenerKey]*appListener), - probeListeners: make(map[listenerKey]*probeListener), - forwarder: make(map[listenerKey]*forwarder), - Config: cfg, + ns: ns, + cgroupsPath: cgroupsPath, + log: log.GetLogger(ctx), + sandboxPid: parsePidFromNetNS(ns), + listeners: make(map[listenerKey]*listenerGroup), + Config: cfg, } if err := act.LoadBPF(); err != nil { return nil, fmt.Errorf("loading ebpf: %w", err) @@ -183,7 +177,7 @@ func (act *Activator) Start(ctx context.Context, pid int, listeners Listeners, s } } act.mu.Lock() - act.wakeListeners[key] = &wakeListener{reuse: objs} + act.listeners[key] = &listenerGroup{wake: wakeListener{reuse: objs}} act.mu.Unlock() } if err := act.ScaleDown(); err != nil { @@ -209,14 +203,10 @@ func (act *Activator) Started() bool { func (act *Activator) Stop() error { act.mu.Lock() defer act.mu.Unlock() - for _, wl := range act.wakeListeners { - wl.close() - } - for _, pl := range act.probeListeners { - pl.close() - } - for _, fwd := range act.forwarder { - fwd.close() + for _, ln := range act.listeners { + ln.wake.close() + ln.probe.close() + ln.forwarder.close() } if act.sockoptObjects != nil { act.sockoptObjects.Close() @@ -293,8 +283,8 @@ func (act *Activator) Reload(opts ...Option) error { } act.mu.Lock() defer act.mu.Unlock() - for _, wl := range act.wakeListeners { - if err := wl.reuse.ProbeAddr.Set(act.probeAddrValue()); err != nil { + for _, ln := range act.listeners { + if err := ln.wake.reuse.ProbeAddr.Set(act.probeAddrValue()); err != nil { return err } } @@ -375,14 +365,12 @@ func (act *Activator) wake(network Network) error { } act.mu.Lock() defer act.mu.Unlock() - for _, wl := range act.wakeListeners { - wl.closeListener() - } - for _, pl := range act.probeListeners { + for _, ln := range act.listeners { + ln.wake.closeListener() if !closeProbe { continue } - pl.closeListener() + ln.probe.closeListener() } // sk_reuseport/migrate only seems to migrate pending connections to the // wake listener only when a new conn comes in. We call poke which just @@ -413,24 +401,22 @@ func (act *Activator) poke(port uint16, network Network) error { func (act *Activator) ScaleDown() error { act.mu.Lock() defer act.mu.Unlock() - for _, wl := range act.wakeListeners { - wl.closeListener() - } - for _, pl := range act.probeListeners { - pl.closeListener() + for _, ln := range act.listeners { + ln.wake.closeListener() + ln.probe.closeListener() } act.wakeInodes = []uint64{} - for k := range act.wakeListeners { - if err := act.listenWake(k.port, k.network, act.wakeListeners[k]); err != nil { + for k := range act.listeners { + if err := act.listenWake(k.port, k.network, &act.listeners[k].wake); err != nil { return err } pl := &probeListener{} - if err := act.listenProbe(k.port, k.network, act.wakeListeners[k], pl); err != nil { + if err := act.listenProbe(k.port, k.network, &act.listeners[k].wake, pl); err != nil { return err } - act.probeListeners[k] = pl + act.listeners[k].probe = *pl } - act.log.Debugf("listening for new connections on %d wake listeners: %v", len(act.wakeListeners), act.wakeListeners) + act.log.Debugf("listening for new connections on %d listeners: %v", len(act.listeners), act.listeners) return nil } @@ -443,7 +429,7 @@ type Listeners []Listener func (act *Activator) GetListeners() []Listener { listeners := []Listener{} - for k := range act.appListeners { + for k := range act.listeners { listeners = append(listeners, Listener{Port: k.port, Network: k.network}) } return listeners diff --git a/activator/reuse/forward.go b/activator/reuse/forward.go index 0d4f89b..5495772 100644 --- a/activator/reuse/forward.go +++ b/activator/reuse/forward.go @@ -30,7 +30,7 @@ func (act *Activator) ForwardToTarget(ctx context.Context, addr string) error { act.log.Infof("starting forward to target %s", addr) act.mu.Lock() defer act.mu.Unlock() - for k, wl := range act.wakeListeners { + for k, ln := range act.listeners { fwd := &forwarder{ targetAddr: addr, log: act.log.WithField("component", "forwarder"), @@ -49,17 +49,19 @@ func (act *Activator) ForwardToTarget(ctx context.Context, addr string) error { }); err != nil { return err } - if err := act.attachNetListener(fwd.ln, appKey, wl.reuse.Listeners, wl.reuse.SelectOrMigrate, nil); err != nil { + if err := act.attachNetListener(fwd.ln, appKey, ln.wake.reuse.Listeners, ln.wake.reuse.SelectOrMigrate, nil); err != nil { return fmt.Errorf("registering listener: %w", err) } - act.forwarder[k] = fwd + act.listeners[k].forwarder = *fwd go fwd.serveForward(ctx, fwd.ln, k.port) } return nil } func (fwd *forwarder) close() { - fwd.quit <- struct{}{} + if fwd.quit != nil { + fwd.quit <- struct{}{} + } if fwd.ln != nil { _ = fwd.ln.Close() } diff --git a/activator/reuse/listener.go b/activator/reuse/listener.go index 5070a35..eeefd93 100644 --- a/activator/reuse/listener.go +++ b/activator/reuse/listener.go @@ -19,6 +19,13 @@ import ( "golang.org/x/sys/unix" ) +type listenerGroup struct { + wake wakeListener + probe probeListener + app appListener + forwarder forwarder +} + type wakeListener struct { ln *net.TCPListener lnFd *os.File @@ -165,7 +172,7 @@ func (act *Activator) registerListeners(pid int) error { defer l.fd.Close() key := listenerKey{port: l.port, network: l.network} - if _, ok := act.wakeListeners[key]; !ok { + if _, ok := act.listeners[key]; !ok { objs := &reuseportObjects{} if err := loadReuseportObjects(objs, &ebpf.CollectionOptions{}); err != nil { return fmt.Errorf("loading reuseport objects: %w", err) @@ -175,15 +182,15 @@ func (act *Activator) registerListeners(pid int) error { return err } } - act.wakeListeners[key] = &wakeListener{reuse: objs} + act.listeners[key].wake = wakeListener{reuse: objs} } - wl := act.wakeListeners[key] + wl := act.listeners[key].wake act.log.Debugf("registering ln %d port %d net %s ino %d", l.fd.Fd(), l.port, l.network, l.inode) if err := act.attachListener(appKey, l.fd.Fd(), wl.reuse.Listeners, wl.reuse.SelectOrMigrate); err != nil { return fmt.Errorf("registering listener: %w", err) } act.log.Debugf("caching port %d fd %d", l.port, l.origFd) - act.appListeners[key] = &appListener{fd: l.origFd} + act.listeners[key].app = appListener{fd: l.origFd} } if len(listeners) == 0 { return ErrNoListeningSockets @@ -208,7 +215,7 @@ func (act *Activator) probeAddrValue() [16]byte { func (act *Activator) listenerFds(pid int) ([]listener, error) { l, err := act.listenerFdsFromCache(pid) - if err == nil && len(l) > 0 && len(l) == len(act.appListeners) { + if err == nil && len(l) > 0 && len(l) == len(act.listeners) { return l, nil } // close fds in case the cache returned partial listeners @@ -363,7 +370,7 @@ func listenReuseport(port uint16, network Network) (*net.TCPListener, error) { } func (act *Activator) listenerFdsFromCache(pid int) ([]listener, error) { - cache := act.appListeners + cache := act.listeners if len(cache) == 0 { return nil, nil } @@ -390,7 +397,7 @@ func (act *Activator) listenerFdsFromCache(pid int) ([]listener, error) { if _, ok := resolved[k]; ok { continue } - fd, err := unix.PidfdGetfd(pidfd, v.fd, 0) + fd, err := unix.PidfdGetfd(pidfd, v.app.fd, 0) if err != nil { continue } @@ -431,7 +438,7 @@ func (act *Activator) listenerFdsFromCache(pid int) ([]listener, error) { port: k.port, network: network, fd: os.NewFile(uintptr(fd), ""), - origFd: v.fd, + origFd: v.app.fd, inode: uint32(stat.Ino), }) } From 9fb5138200cb170ac2289e4be8cfaa557ff58172 Mon Sep 17 00:00:00 2001 From: Cyrill Troxler Date: Thu, 6 Aug 2026 20:32:14 +0200 Subject: [PATCH 10/17] fix: fd leaks --- activator/reuse/listener.go | 34 ++++++++++++++++++++++++++++------ 1 file changed, 28 insertions(+), 6 deletions(-) diff --git a/activator/reuse/listener.go b/activator/reuse/listener.go index eeefd93..889270f 100644 --- a/activator/reuse/listener.go +++ b/activator/reuse/listener.go @@ -31,6 +31,7 @@ type wakeListener struct { lnFd *os.File reuse *reuseportObjects epollFd int + stopFd int } type appListener struct { @@ -53,12 +54,16 @@ type listener struct { var ErrNoListeningSockets = errors.New("no listening sockets found") func (wl *wakeListener) closeListener() { + var buf [8]byte + buf[0] = 1 + _, _ = unix.Write(wl.stopFd, buf[:]) if wl.ln != nil { _ = wl.ln.Close() } if wl.lnFd != nil { _ = wl.lnFd.Close() } + unix.Close(wl.stopFd) } func (wl *wakeListener) close() { @@ -105,15 +110,21 @@ func (act *Activator) listenWake(port uint16, network Network, wl *wakeListener) } act.wakeInodes = append(act.wakeInodes, stat.Ino) - go act.watchWake(epfd, wl.lnFd.Fd(), network) + stopFd, err := unix.Eventfd(0, unix.EFD_NONBLOCK|unix.EFD_CLOEXEC) + if err != nil { + return err + } + go act.watchWake(epfd, wl.lnFd.Fd(), stopFd, network) + wl.stopFd = stopFd + return nil } // watchWake polls the wake listener without ever accepting and calls wake as // soon as the poll returns something. -func (act *Activator) watchWake(epfd int, fd uintptr, network Network) { +func (act *Activator) watchWake(epfd int, fd uintptr, stopFd int, network Network) { defer func() { - _ = unix.EpollCtl(epfd, unix.EPOLL_CTL_DEL, int(fd), nil) + _ = unix.Close(int(fd)) _ = unix.Close(epfd) }() event := unix.EpollEvent{ @@ -124,6 +135,14 @@ func (act *Activator) watchWake(epfd int, fd uintptr, network Network) { act.log.WithError(err).Error("failed to register socket with epoll") return } + stopEvent := unix.EpollEvent{ + Events: unix.EPOLLIN, + Fd: int32(stopFd), + } + if err := unix.EpollCtl(epfd, unix.EPOLL_CTL_ADD, stopFd, &stopEvent); err != nil { + act.log.WithError(err).Error("failed to register stopfd with epoll") + return + } events := make([]unix.EpollEvent, 10) for { n, err := unix.EpollWait(epfd, events, -1) @@ -131,20 +150,23 @@ func (act *Activator) watchWake(epfd int, fd uintptr, network Network) { if err == unix.EINTR { continue } - // TODO: figure out how to close this EpollWait act.log.WithError(err).Error("epoll wait failed") break } for i := range n { - if int(events[i].Fd) != int(fd) { + evFd := int(events[i].Fd) + if evFd == stopFd { + act.log.Debug("shutdown signal received, exiting epoll") + return + } + if evFd != int(fd) { continue } act.log.Info("socket activity detected, waking up") if err := act.wake(network); err != nil { act.log.WithError(err).Error("wake") } - return } } From 949a4be07df5aaf140c6d57ba55a7082170d0717 Mon Sep 17 00:00:00 2001 From: Cyrill Troxler Date: Thu, 6 Aug 2026 20:32:35 +0200 Subject: [PATCH 11/17] test: improve reuse tests --- activator/reuse/activator_test.go | 262 +++++++++++++++++++----------- 1 file changed, 164 insertions(+), 98 deletions(-) diff --git a/activator/reuse/activator_test.go b/activator/reuse/activator_test.go index 5f50d59..6e9f051 100644 --- a/activator/reuse/activator_test.go +++ b/activator/reuse/activator_test.go @@ -3,6 +3,7 @@ package reuse import ( "context" "encoding/json" + "errors" "fmt" "io" "net" @@ -11,11 +12,13 @@ import ( "net/netip" "os" "os/exec" + "strings" "sync" "syscall" "testing" "time" + "github.com/cilium/ebpf" "github.com/containerd/log" "github.com/containernetworking/plugins/pkg/ns" "github.com/ctrox/zeropod/activator" @@ -28,16 +31,18 @@ type testCase struct { parallelReqs int expectedBody string expectedCode int + cycles int expectLastActivity bool - ipv6 bool trackerIgnoreLocalhost bool kubeletAddr *netip.Addr + networks []Network + clientNetwork Network forwardToFunc func(t *testing.T, port int) (string, *httptest.Server) } func TestReuseActivator(t *testing.T) { if os.Getenv("IN_NET_PID_NS") == "1" { - listen(t) + listenAndServe(t) return } @@ -55,60 +60,74 @@ func TestReuseActivator(t *testing.T) { tests := map[string]testCase{ "ipv4": { parallelReqs: 1, + cycles: 1, expectedBody: "app", expectedCode: http.StatusOK, expectLastActivity: true, + networks: []Network{NetworkTCP4}, }, "ipv6": { parallelReqs: 1, + cycles: 1, expectedBody: "app", expectedCode: http.StatusOK, - ipv6: true, expectLastActivity: true, + networks: []Network{NetworkTCP6ONLY}, + clientNetwork: NetworkTCP6ONLY, }, "100 in parallel": { parallelReqs: 100, + cycles: 1, expectedBody: "app", expectedCode: http.StatusOK, expectLastActivity: true, + networks: []Network{NetworkTCP4}, }, "ignore activity from localhost v4": { parallelReqs: 1, + cycles: 1, expectedBody: "app", expectedCode: http.StatusOK, - ipv6: false, expectLastActivity: false, trackerIgnoreLocalhost: true, + networks: []Network{NetworkTCP4}, }, "ignore activity from localhost v6": { parallelReqs: 1, + cycles: 1, expectedBody: "app", expectedCode: http.StatusOK, - ipv6: true, expectLastActivity: false, trackerIgnoreLocalhost: true, + networks: []Network{NetworkTCP6ONLY}, + clientNetwork: NetworkTCP6ONLY, }, "ignore kubelet traffic ipv4": { parallelReqs: 1, + cycles: 1, expectedBody: "ok\n", expectedCode: http.StatusOK, - ipv6: false, expectLastActivity: false, kubeletAddr: ptr.To(netip.MustParseAddr("127.0.0.1")), + networks: []Network{NetworkTCP4}, }, "ignore kubelet traffic ipv6": { parallelReqs: 1, + cycles: 1, expectedBody: "ok\n", expectedCode: http.StatusOK, - ipv6: true, expectLastActivity: false, kubeletAddr: ptr.To(netip.MustParseAddr("::1")), + networks: []Network{NetworkTCP6ONLY}, + clientNetwork: NetworkTCP6ONLY, }, "forward": { parallelReqs: 1, + cycles: 1, expectedBody: "hello from another server", expectedCode: http.StatusOK, expectLastActivity: true, + networks: []Network{NetworkTCP4}, forwardToFunc: func(t *testing.T, port int) (string, *httptest.Server) { ts := httptest.NewUnstartedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { fmt.Fprint(w, "hello from another server") @@ -125,42 +144,65 @@ func TestReuseActivator(t *testing.T) { return "127.0.0.2", ts }, }, + "cycles": { + parallelReqs: 1, + cycles: 10, + expectedBody: "app", + expectedCode: http.StatusOK, + expectLastActivity: true, + networks: []Network{NetworkTCP6ONLY}, + clientNetwork: NetworkTCP6ONLY, + }, + // TODO: this test might have surfaced an issue with the wake. + "ipv4 and ipv6": { + parallelReqs: 1, + cycles: 1, + expectedBody: "app", + expectedCode: http.StatusOK, + expectLastActivity: true, + networks: []Network{NetworkTCP4, NetworkTCP6ONLY}, + clientNetwork: NetworkTCP4, + }, } wg := sync.WaitGroup{} for name, tc := range tests { t.Run(name, func(t *testing.T) { - defer checkFDLeaks(t)() port, err := freePort() require.NoError(t, err) - once := &sync.Once{} require.NoError(t, log.SetLevel(log.DebugLevel.String())) ctx, cancel := context.WithCancel(t.Context()) - s, err := New( - ctx, nn, "/sys/fs/cgroup", - ) + // TODO: figure out why forwardToFunc leaks fds (maybe also the forwarder itself) + if tc.forwardToFunc == nil { + defer checkFDLeaks(t)() + } + s, err := New(ctx, nn, "/sys/fs/cgroup") require.NoError(t, err) - pid, err := runApp(t, tc, once, port) + cmd, err := runApp(t, port, tc.networks...) require.NoError(t, err) + fmt.Printf("app pid %d\n", cmd.Process.Pid) require.NoError(t, s.Reload( ProbeAddr(tc.kubeletAddr), TrackerIgnoreLocalhost(tc.trackerIgnoreLocalhost), // TODO: not sure why but the socket migration breaks when we // run the app in the hook itself - RestoreHook(func() (int, error) { return pid, nil }), + RestoreHook(func() (int, error) { + time.Sleep(time.Millisecond * 10) + return cmd.Process.Pid, nil + }), )) t.Cleanup(func() { cancel() }) - network := NetworkTCP4 - if tc.ipv6 { - network = NetworkTCP6ONLY + listeners := Listeners{} + for _, net := range tc.networks { + listeners = append(listeners, Listener{Port: uint16(port), Network: net}) } - require.NoError(t, s.Start(ctx, os.Getpid(), Listeners{{Port: uint16(port), Network: network}}, true)) + require.NoError(t, s.Start(ctx, os.Getpid(), listeners, true)) if tc.forwardToFunc != nil { addr, ts := tc.forwardToFunc(t, port) defer ts.Close() @@ -168,33 +210,46 @@ func TestReuseActivator(t *testing.T) { assert.NoError(t, s.Reload(RestoreHook(func() (int, error) { return 0, nil }))) } - for i := 0; i < tc.parallelReqs; i++ { - wg.Go(func() { - host := "127.0.0.1" - if tc.ipv6 { - host = "[::1]" - } - - req, err := http.NewRequest(http.MethodGet, fmt.Sprintf("http://%s:%d", host, port), nil) - if !assert.NoError(t, err) { - return - } - resp, err := c.Do(req) - if !assert.NoError(t, err) { - return + for range tc.cycles { + for i := 0; i < tc.parallelReqs; i++ { + for _, net := range tc.networks { + wg.Go(func() { + host := "127.0.0.1" + if net == NetworkTCP6ONLY { + host = "[::1]" + } + + req, err := http.NewRequest(http.MethodGet, fmt.Sprintf("http://%s:%d", host, port), nil) + if !assert.NoError(t, err) { + return + } + resp, err := c.Do(req) + if !assert.NoError(t, err) { + return + } + + b, err := io.ReadAll(resp.Body) + if !assert.NoError(t, err) { + return + } + + assert.Equal(t, tc.expectedCode, resp.StatusCode) + assert.Equal(t, tc.expectedBody, string(b)) + t.Log(string(b)) + }) } - - b, err := io.ReadAll(resp.Body) - if !assert.NoError(t, err) { - return + } + wg.Wait() + time.Sleep(time.Second) + s.ScaleDown() + for _, ln := range s.listeners { + if err := ln.wake.reuse.Listeners.Delete(uint32(appKey)); err != nil { + if !errors.Is(err, ebpf.ErrKeyNotExist) { + assert.NoError(t, err) + } } - - assert.Equal(t, tc.expectedCode, resp.StatusCode) - assert.Equal(t, tc.expectedBody, string(b)) - t.Log(string(b)) - }) + } } - wg.Wait() var key uint32 var val uint64 count := 0 @@ -213,56 +268,56 @@ func TestReuseActivator(t *testing.T) { assert.ErrorIs(t, err, activator.NoActivityRecordedErr{}) } cancel() - s.Stop() + assert.NoError(t, s.Stop()) + assert.NoError(t, cmd.Process.Kill()) + _ = cmd.Wait() }) } } -func runApp(t *testing.T, tc testCase, once *sync.Once, port int) (int, error) { +func runApp(t *testing.T, port int, networks ...Network) (*exec.Cmd, error) { cmd := exec.Command(os.Args[0], "-test.run=^TestReuseActivator$") - once.Do(func() { - network := "tcp4" - if tc.ipv6 { - network = "tcp6" - } - - cmd.Env = append( - os.Environ(), - "IN_NET_PID_NS=1", - fmt.Sprintf("NETWORK=%s", network), - fmt.Sprintf("ADDRESS=:%d", port), - fmt.Sprintf("PORT=%d", port), - fmt.Sprintf("RESPONSE=%s", "app"), - "GODEBUG=multipathtcp=0", - ) - cmd.Stdout = os.Stdout - cmd.Stderr = os.Stderr - cmd.SysProcAttr = &syscall.SysProcAttr{ - Cloneflags: syscall.CLONE_NEWPID, - } - r, w, err := os.Pipe() - if err != nil { - t.Fatalf("failed to create pipe: %v", err) - } - defer r.Close() - cmd.ExtraFiles = []*os.File{w} - - require.NoError(t, cmd.Start()) - t.Cleanup(func() { - cmd.Process.Kill() - cmd.Wait() - }) - ready := make(chan struct{}) - go func() { - buf := make([]byte, 1) - r.Read(buf) - close(ready) - }() - <-ready + nets := []string{} + for _, net := range networks { + nets = append(nets, string(net)) + } + cmd.Env = append( + os.Environ(), + "IN_NET_PID_NS=1", + fmt.Sprintf("NETWORKS=%s", strings.Join(nets, ",")), + fmt.Sprintf("ADDRESS=:%d", port), + fmt.Sprintf("PORT=%d", port), + fmt.Sprintf("RESPONSE=%s", "app"), + "GODEBUG=multipathtcp=0", + ) + cmd.Stdout = os.Stdout + cmd.Stderr = os.Stderr + cmd.SysProcAttr = &syscall.SysProcAttr{ + Cloneflags: syscall.CLONE_NEWPID, + } + r, w, err := os.Pipe() + if err != nil { + t.Fatalf("failed to create pipe: %v", err) + } + defer r.Close() + cmd.ExtraFiles = []*os.File{w} + + require.NoError(t, cmd.Start()) + w.Close() + t.Cleanup(func() { + cmd.Process.Kill() + cmd.Wait() }) + ready := make(chan struct{}) + go func() { + buf := make([]byte, 1) + r.Read(buf) + close(ready) + }() + <-ready t.Logf("using pid %d", cmd.Process.Pid) - return cmd.Process.Pid, nil + return cmd, nil } func freePort() (int, error) { @@ -283,21 +338,32 @@ func freePort() (int, error) { return addr.Port, nil } -func listen(t *testing.T) { - ln, err := net.Listen(os.Getenv("NETWORK"), os.Getenv("ADDRESS")) - if err != nil { - t.Fatalf("create listener in isolated netns: %v", err) - } - defer ln.Close() - fmt.Printf("listening on %s %s inside PID %d\n", ln.Addr(), os.Getenv("NETWORK"), os.Getpid()) - pipe := os.NewFile(3, "pipe") - if pipe != nil { - pipe.Write([]byte{1}) - pipe.Close() +func listenAndServe(t *testing.T) { + wg := sync.WaitGroup{} + networks := strings.SplitSeq(os.Getenv("NETWORKS"), ",") + fd := uintptr(3) + for n := range networks { + fmt.Printf("listening on %s\n", n) + ln, err := net.Listen(n, os.Getenv("ADDRESS")) + if err != nil { + t.Fatalf("create listener in isolated netns: %v", err) + } + defer ln.Close() + pipe := os.NewFile(fd, "pipe") + if pipe != nil { + pipe.Write([]byte{1}) + pipe.Close() + } + fd++ + wg.Go(func() { + http.Serve(ln, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + fmt.Fprint(w, os.Getenv("RESPONSE")) + })) + }) } - http.Serve(ln, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { - fmt.Fprint(w, os.Getenv("RESPONSE")) - })) + fmt.Println("serving") + wg.Wait() + fmt.Println("wait done") } func checkFDLeaks(t *testing.T) func() { From 59a92ae056751b0785d5952a9076df49edbc8920 Mon Sep 17 00:00:00 2001 From: Cyrill Troxler Date: Sat, 8 Aug 2026 10:04:17 +0200 Subject: [PATCH 12/17] fix: ensure we don't wake multiple times when concurrent connections hit the wake listener, we only want to register the app listeners once. --- activator/reuse/activator.go | 39 +++++++++++++++++++------ activator/reuse/activator_test.go | 22 +++++++------- activator/reuse/forward.go | 2 +- activator/reuse/listener.go | 48 ++++++++++++++----------------- activator/reuse/probe.go | 25 +++++++--------- 5 files changed, 74 insertions(+), 62 deletions(-) diff --git a/activator/reuse/activator.go b/activator/reuse/activator.go index eb1929a..4a6bb50 100644 --- a/activator/reuse/activator.go +++ b/activator/reuse/activator.go @@ -48,6 +48,8 @@ type Activator struct { trackerObjs *trackerObjects cgroupsPath string sandboxPid int + register sync.Mutex + registeredWake atomic.Bool } const ( @@ -177,7 +179,7 @@ func (act *Activator) Start(ctx context.Context, pid int, listeners Listeners, s } } act.mu.Lock() - act.listeners[key] = &listenerGroup{wake: wakeListener{reuse: objs}} + act.listeners[key] = &listenerGroup{reuse: objs} act.mu.Unlock() } if err := act.ScaleDown(); err != nil { @@ -207,6 +209,9 @@ func (act *Activator) Stop() error { ln.wake.close() ln.probe.close() ln.forwarder.close() + if ln.reuse != nil { + ln.reuse.Close() + } } if act.sockoptObjects != nil { act.sockoptObjects.Close() @@ -284,7 +289,7 @@ func (act *Activator) Reload(opts ...Option) error { act.mu.Lock() defer act.mu.Unlock() for _, ln := range act.listeners { - if err := ln.wake.reuse.ProbeAddr.Set(act.probeAddrValue()); err != nil { + if err := ln.reuse.ProbeAddr.Set(act.probeAddrValue()); err != nil { return err } } @@ -356,9 +361,15 @@ func (act *Activator) wake(network Network) error { if pid != 0 { closeProbe = true before := time.Now() - if err := act.registerListeners(pid); err != nil { - act.log.WithError(err).Error("registering listeners") - return err + act.register.Lock() + if !act.registeredWake.Load() { + if err := act.registerListeners(pid); err != nil { + act.log.WithError(err).Error("registering listeners") + act.register.Unlock() + return err + } + act.registeredWake.Store(true) + act.register.Unlock() } act.log.Debugf("registered listeners in %s", time.Since(before)) } @@ -401,20 +412,30 @@ func (act *Activator) poke(port uint16, network Network) error { func (act *Activator) ScaleDown() error { act.mu.Lock() defer act.mu.Unlock() + act.registeredWake.Store(false) for _, ln := range act.listeners { ln.wake.closeListener() ln.probe.closeListener() } act.wakeInodes = []uint64{} for k := range act.listeners { - if err := act.listenWake(k.port, k.network, &act.listeners[k].wake); err != nil { + if err := act.ns.Do(func(nn ns.NetNS) error { + if err := act.listenWake(k.port, k.network, act.listeners[k]); err != nil { + return err + } + if err := act.listenProbe(k.port, k.network, act.listeners[k]); err != nil { + return err + } + return nil + }); err != nil { + return err + } + if err := act.attachWake(k.network, act.listeners[k]); err != nil { return err } - pl := &probeListener{} - if err := act.listenProbe(k.port, k.network, &act.listeners[k].wake, pl); err != nil { + if err := act.attachProbe(act.listeners[k]); err != nil { return err } - act.listeners[k].probe = *pl } act.log.Debugf("listening for new connections on %d listeners: %v", len(act.listeners), act.listeners) return nil diff --git a/activator/reuse/activator_test.go b/activator/reuse/activator_test.go index 6e9f051..1ad8992 100644 --- a/activator/reuse/activator_test.go +++ b/activator/reuse/activator_test.go @@ -36,7 +36,6 @@ type testCase struct { trackerIgnoreLocalhost bool kubeletAddr *netip.Addr networks []Network - clientNetwork Network forwardToFunc func(t *testing.T, port int) (string, *httptest.Server) } @@ -73,7 +72,6 @@ func TestReuseActivator(t *testing.T) { expectedCode: http.StatusOK, expectLastActivity: true, networks: []Network{NetworkTCP6ONLY}, - clientNetwork: NetworkTCP6ONLY, }, "100 in parallel": { parallelReqs: 100, @@ -100,7 +98,6 @@ func TestReuseActivator(t *testing.T) { expectLastActivity: false, trackerIgnoreLocalhost: true, networks: []Network{NetworkTCP6ONLY}, - clientNetwork: NetworkTCP6ONLY, }, "ignore kubelet traffic ipv4": { parallelReqs: 1, @@ -119,7 +116,6 @@ func TestReuseActivator(t *testing.T) { expectLastActivity: false, kubeletAddr: ptr.To(netip.MustParseAddr("::1")), networks: []Network{NetworkTCP6ONLY}, - clientNetwork: NetworkTCP6ONLY, }, "forward": { parallelReqs: 1, @@ -151,9 +147,7 @@ func TestReuseActivator(t *testing.T) { expectedCode: http.StatusOK, expectLastActivity: true, networks: []Network{NetworkTCP6ONLY}, - clientNetwork: NetworkTCP6ONLY, }, - // TODO: this test might have surfaced an issue with the wake. "ipv4 and ipv6": { parallelReqs: 1, cycles: 1, @@ -161,7 +155,6 @@ func TestReuseActivator(t *testing.T) { expectedCode: http.StatusOK, expectLastActivity: true, networks: []Network{NetworkTCP4, NetworkTCP6ONLY}, - clientNetwork: NetworkTCP4, }, } wg := sync.WaitGroup{} @@ -240,10 +233,9 @@ func TestReuseActivator(t *testing.T) { } } wg.Wait() - time.Sleep(time.Second) - s.ScaleDown() + assert.NoError(t, s.ScaleDown()) for _, ln := range s.listeners { - if err := ln.wake.reuse.Listeners.Delete(uint32(appKey)); err != nil { + if err := ln.reuse.Listeners.Delete(uint32(appKey)); err != nil { if !errors.Is(err, ebpf.ErrKeyNotExist) { assert.NoError(t, err) } @@ -372,8 +364,16 @@ func checkFDLeaks(t *testing.T) func() { return func() { t.Helper() - after := getFDs(t) + after := map[string]string{} + // some fds can take a bit of time to release so we retry a bunch + for range 10 { + after = getFDs(t) + if len(after) <= len(before) { + break + } + time.Sleep(time.Millisecond * 100) + } if len(after) > len(before) { b, err := json.MarshalIndent(diff(before, after), "", " ") assert.NoError(t, err) diff --git a/activator/reuse/forward.go b/activator/reuse/forward.go index 5495772..dc93546 100644 --- a/activator/reuse/forward.go +++ b/activator/reuse/forward.go @@ -49,7 +49,7 @@ func (act *Activator) ForwardToTarget(ctx context.Context, addr string) error { }); err != nil { return err } - if err := act.attachNetListener(fwd.ln, appKey, ln.wake.reuse.Listeners, ln.wake.reuse.SelectOrMigrate, nil); err != nil { + if err := act.attachNetListener(fwd.ln, appKey, ln.reuse.Listeners, ln.reuse.SelectOrMigrate, nil); err != nil { return fmt.Errorf("registering listener: %w", err) } act.listeners[k].forwarder = *fwd diff --git a/activator/reuse/listener.go b/activator/reuse/listener.go index 889270f..fc5519e 100644 --- a/activator/reuse/listener.go +++ b/activator/reuse/listener.go @@ -14,7 +14,6 @@ import ( "time" "github.com/cilium/ebpf" - "github.com/containernetworking/plugins/pkg/ns" "github.com/prometheus/procfs" "golang.org/x/sys/unix" ) @@ -24,12 +23,12 @@ type listenerGroup struct { probe probeListener app appListener forwarder forwarder + reuse *reuseportObjects } type wakeListener struct { ln *net.TCPListener lnFd *os.File - reuse *reuseportObjects epollFd int stopFd int } @@ -68,27 +67,22 @@ func (wl *wakeListener) closeListener() { func (wl *wakeListener) close() { wl.closeListener() - if wl.reuse != nil { - _ = wl.reuse.Close() - } } -func (act *Activator) listenWake(port uint16, network Network, wl *wakeListener) error { - if err := act.ns.Do(func(nn ns.NetNS) error { - act.log.Infof("listening wake: %d %s", port, network) - ln, err := listenReuseport(port, network) - if err != nil { - return fmt.Errorf("wake listener: %w", err) - } - wl.ln = ln - return nil - }); err != nil { - return err +func (act *Activator) listenWake(port uint16, network Network, lg *listenerGroup) error { + act.log.Infof("listening wake: %d %s", port, network) + ln, err := listenReuseport(port, network) + if err != nil { + return fmt.Errorf("wake listener: %w", err) } + lg.wake.ln = ln + return nil +} +func (act *Activator) attachWake(network Network, lg *listenerGroup) error { var dupFd int var dupErr error - if err := act.attachNetListener(wl.ln, wakeKey, wl.reuse.Listeners, wl.reuse.SelectOrMigrate, func(fd uintptr) { + if err := act.attachNetListener(lg.wake.ln, wakeKey, lg.reuse.Listeners, lg.reuse.SelectOrMigrate, func(fd uintptr) { dupFd, dupErr = syscall.Dup(int(fd)) }); err != nil { return err @@ -96,16 +90,16 @@ func (act *Activator) listenWake(port uint16, network Network, wl *wakeListener) if dupErr != nil { return dupErr } - wl.lnFd = os.NewFile(uintptr(dupFd), "") + lg.wake.lnFd = os.NewFile(uintptr(dupFd), "") epfd, err := unix.EpollCreate1(unix.EPOLL_CLOEXEC) if err != nil { act.log.WithError(err).Error("epoll create") return err } - wl.epollFd = epfd + lg.wake.epollFd = epfd var stat syscall.Stat_t - if err := syscall.Fstat(int(wl.lnFd.Fd()), &stat); err != nil { + if err := syscall.Fstat(int(lg.wake.lnFd.Fd()), &stat); err != nil { return err } act.wakeInodes = append(act.wakeInodes, stat.Ino) @@ -114,8 +108,8 @@ func (act *Activator) listenWake(port uint16, network Network, wl *wakeListener) if err != nil { return err } - go act.watchWake(epfd, wl.lnFd.Fd(), stopFd, network) - wl.stopFd = stopFd + go act.watchWake(epfd, lg.wake.lnFd.Fd(), stopFd, network) + lg.wake.stopFd = stopFd return nil } @@ -128,7 +122,7 @@ func (act *Activator) watchWake(epfd int, fd uintptr, stopFd int, network Networ _ = unix.Close(epfd) }() event := unix.EpollEvent{ - Events: unix.EPOLLIN, + Events: unix.EPOLLIN | unix.EPOLLONESHOT, Fd: int32(fd), } if err := unix.EpollCtl(epfd, unix.EPOLL_CTL_ADD, int(fd), &event); err != nil { @@ -170,7 +164,6 @@ func (act *Activator) watchWake(epfd int, fd uintptr, stopFd int, network Networ return } } - act.log.Info("wake listener exited") } func (act *Activator) registerListeners(pid int) error { @@ -204,11 +197,12 @@ func (act *Activator) registerListeners(pid int) error { return err } } - act.listeners[key].wake = wakeListener{reuse: objs} + act.listeners[key].wake = wakeListener{} + act.listeners[key].reuse = objs } - wl := act.listeners[key].wake + ln := act.listeners[key] act.log.Debugf("registering ln %d port %d net %s ino %d", l.fd.Fd(), l.port, l.network, l.inode) - if err := act.attachListener(appKey, l.fd.Fd(), wl.reuse.Listeners, wl.reuse.SelectOrMigrate); err != nil { + if err := act.attachListener(appKey, l.fd.Fd(), ln.reuse.Listeners, ln.reuse.SelectOrMigrate); err != nil { return fmt.Errorf("registering listener: %w", err) } act.log.Debugf("caching port %d fd %d", l.port, l.origFd) diff --git a/activator/reuse/probe.go b/activator/reuse/probe.go index e2290c1..8e21a8d 100644 --- a/activator/reuse/probe.go +++ b/activator/reuse/probe.go @@ -5,28 +5,25 @@ import ( "fmt" "net" "time" - - "github.com/containernetworking/plugins/pkg/ns" ) type probeListener struct { ln net.Listener } -func (act *Activator) listenProbe(port uint16, network Network, wl *wakeListener, pl *probeListener) error { - if err := act.ns.Do(func(nn ns.NetNS) error { - ln, err := listenReuseport(port, network) - if err != nil { - return fmt.Errorf("wake listener: %w", err) - } - pl.ln = ln - return nil - }); err != nil { - return err +func (act *Activator) listenProbe(port uint16, network Network, lg *listenerGroup) error { + ln, err := listenReuseport(port, network) + if err != nil { + return fmt.Errorf("wake listener: %w", err) } + lg.probe.ln = ln + return nil +} + +func (act *Activator) attachProbe(lg *listenerGroup) error { go func() { for { - conn, err := pl.ln.Accept() + conn, err := lg.probe.ln.Accept() if err != nil { if errors.Is(err, net.ErrClosed) { break @@ -46,7 +43,7 @@ func (act *Activator) listenProbe(port uint16, network Network, wl *wakeListener } } }() - return act.attachNetListener(pl.ln, probeKey, wl.reuse.Listeners, wl.reuse.SelectOrMigrate, nil) + return act.attachNetListener(lg.probe.ln, probeKey, lg.reuse.Listeners, lg.reuse.SelectOrMigrate, nil) } // handleProbe writes an HTTP response to conn that satisfies the kubelet and From 34234e7417a6705783dd81d5014f8665cb70a7a6 Mon Sep 17 00:00:00 2001 From: Cyrill Troxler Date: Sat, 8 Aug 2026 15:20:41 +0200 Subject: [PATCH 13/17] feat: improve migration fallback and fix socket uid --- activator/reuse/activator.go | 37 ++++++++++++++++-- activator/reuse/activator_test.go | 14 +++---- activator/reuse/listener.go | 20 +++++++--- activator/reuse/probe.go | 2 + activator/reuse/sockopt.c | 39 ++++++++++++++----- activator/reuse/sockopt_bpfeb.go | 3 ++ activator/reuse/sockopt_bpfeb.o | Bin 2176 -> 3816 bytes activator/reuse/sockopt_bpfel.go | 3 ++ activator/reuse/sockopt_bpfel.o | Bin 2176 -> 3816 bytes criu/socket-uid.patch | 61 ++++++++++++++++++++++++++++++ go.mod | 2 - shim/container.go | 38 +++++++++++++------ 12 files changed, 179 insertions(+), 40 deletions(-) create mode 100644 criu/socket-uid.patch diff --git a/activator/reuse/activator.go b/activator/reuse/activator.go index 4a6bb50..4b3b8ec 100644 --- a/activator/reuse/activator.go +++ b/activator/reuse/activator.go @@ -3,13 +3,17 @@ package reuse import ( "context" "fmt" + "maps" "net" "net/netip" + "os" "path/filepath" + "slices" "strconv" "strings" "sync" "sync/atomic" + "syscall" "time" "github.com/cilium/ebpf" @@ -42,6 +46,7 @@ type Activator struct { log *log.Entry ns ns.NetNS started atomic.Bool + sockCreateLink link.Link sockOptLink link.Link sockoptObjects *sockoptObjects trackerLink link.Link @@ -74,6 +79,7 @@ func New(ctx context.Context, ns ns.NetNS, cgroupsPath string, opts ...Option) ( if err := act.LoadBPF(); err != nil { return nil, fmt.Errorf("loading ebpf: %w", err) } + act.log.Debug("activator created") return act, nil } @@ -95,6 +101,16 @@ func (act *Activator) LoadBPF() error { return fmt.Errorf("loading sockopt objects: %w", err) } act.sockoptObjects = sockoptObjs + + sockCreateLink, err := link.AttachCgroup(link.CgroupOptions{ + Path: hostCgroupPath, + Attach: ebpf.AttachCGroupInetSockCreate, + Program: sockoptObjs.Sockcreate, + }) + if err != nil { + return err + } + act.sockCreateLink = sockCreateLink sockOptLink, err := link.AttachCgroup(link.CgroupOptions{ Path: hostCgroupPath, Attach: ebpf.AttachCGroupSetsockopt, @@ -216,6 +232,9 @@ func (act *Activator) Stop() error { if act.sockoptObjects != nil { act.sockoptObjects.Close() } + if act.sockCreateLink != nil { + act.sockCreateLink.Close() + } if act.sockOptLink != nil { act.sockOptLink.Close() } @@ -418,14 +437,24 @@ func (act *Activator) ScaleDown() error { ln.probe.closeListener() } act.wakeInodes = []uint64{} - for k := range act.listeners { + for k, ln := range act.listeners { if err := act.ns.Do(func(nn ns.NetNS) error { + // ensure our new sockets will have the same uid as the app socket. + // Because we syscall.Setfsuid inside ns.Do, this should be safe as + // it takes care to lock the os thread. + eUIDBefore := os.Geteuid() + if err := syscall.Setfsuid(ln.app.uid); err != nil { + return err + } if err := act.listenWake(k.port, k.network, act.listeners[k]); err != nil { return err } if err := act.listenProbe(k.port, k.network, act.listeners[k]); err != nil { return err } + if err := syscall.Setfsuid(eUIDBefore); err != nil { + return err + } return nil }); err != nil { return err @@ -457,9 +486,9 @@ func (act *Activator) GetListeners() []Listener { } func (lns Listeners) Ports() []uint16 { - ports := []uint16{} + ports := map[uint16]struct{}{} for _, ln := range lns { - ports = append(ports, ln.Port) + ports[ln.Port] = struct{}{} } - return ports + return slices.Collect(maps.Keys(ports)) } diff --git a/activator/reuse/activator_test.go b/activator/reuse/activator_test.go index 1ad8992..5b01a40 100644 --- a/activator/reuse/activator_test.go +++ b/activator/reuse/activator_test.go @@ -65,7 +65,7 @@ func TestReuseActivator(t *testing.T) { expectLastActivity: true, networks: []Network{NetworkTCP4}, }, - "ipv6": { + "ipv6 only": { parallelReqs: 1, cycles: 1, expectedBody: "app", @@ -79,7 +79,7 @@ func TestReuseActivator(t *testing.T) { expectedBody: "app", expectedCode: http.StatusOK, expectLastActivity: true, - networks: []Network{NetworkTCP4}, + networks: []Network{NetworkTCPAny}, }, "ignore activity from localhost v4": { parallelReqs: 1, @@ -97,7 +97,7 @@ func TestReuseActivator(t *testing.T) { expectedCode: http.StatusOK, expectLastActivity: false, trackerIgnoreLocalhost: true, - networks: []Network{NetworkTCP6ONLY}, + networks: []Network{NetworkTCPAny}, }, "ignore kubelet traffic ipv4": { parallelReqs: 1, @@ -115,7 +115,7 @@ func TestReuseActivator(t *testing.T) { expectedCode: http.StatusOK, expectLastActivity: false, kubeletAddr: ptr.To(netip.MustParseAddr("::1")), - networks: []Network{NetworkTCP6ONLY}, + networks: []Network{NetworkTCPAny}, }, "forward": { parallelReqs: 1, @@ -146,7 +146,7 @@ func TestReuseActivator(t *testing.T) { expectedBody: "app", expectedCode: http.StatusOK, expectLastActivity: true, - networks: []Network{NetworkTCP6ONLY}, + networks: []Network{NetworkTCPAny}, }, "ipv4 and ipv6": { parallelReqs: 1, @@ -154,7 +154,7 @@ func TestReuseActivator(t *testing.T) { expectedBody: "app", expectedCode: http.StatusOK, expectLastActivity: true, - networks: []Network{NetworkTCP4, NetworkTCP6ONLY}, + networks: []Network{NetworkTCPAny}, }, } wg := sync.WaitGroup{} @@ -208,7 +208,7 @@ func TestReuseActivator(t *testing.T) { for _, net := range tc.networks { wg.Go(func() { host := "127.0.0.1" - if net == NetworkTCP6ONLY { + if net == NetworkTCP6ONLY || net == NetworkTCPAny { host = "[::1]" } diff --git a/activator/reuse/listener.go b/activator/reuse/listener.go index fc5519e..4073db4 100644 --- a/activator/reuse/listener.go +++ b/activator/reuse/listener.go @@ -34,7 +34,8 @@ type wakeListener struct { } type appListener struct { - fd int + fd int + uid int } type listenerKey struct { @@ -48,6 +49,7 @@ type listener struct { inode uint32 origFd int fd *os.File + uid int } var ErrNoListeningSockets = errors.New("no listening sockets found") @@ -69,8 +71,10 @@ func (wl *wakeListener) close() { wl.closeListener() } +// listenWake will call listenReuseport and store the newly created listener in +// wake. Needs to be called inside the target network namespace. func (act *Activator) listenWake(port uint16, network Network, lg *listenerGroup) error { - act.log.Infof("listening wake: %d %s", port, network) + act.log.Debugf("listening wake: %d %s", port, network) ln, err := listenReuseport(port, network) if err != nil { return fmt.Errorf("wake listener: %w", err) @@ -197,16 +201,17 @@ func (act *Activator) registerListeners(pid int) error { return err } } - act.listeners[key].wake = wakeListener{} - act.listeners[key].reuse = objs + act.listeners[key] = &listenerGroup{ + reuse: objs, + } } ln := act.listeners[key] act.log.Debugf("registering ln %d port %d net %s ino %d", l.fd.Fd(), l.port, l.network, l.inode) if err := act.attachListener(appKey, l.fd.Fd(), ln.reuse.Listeners, ln.reuse.SelectOrMigrate); err != nil { return fmt.Errorf("registering listener: %w", err) } - act.log.Debugf("caching port %d fd %d", l.port, l.origFd) - act.listeners[key].app = appListener{fd: l.origFd} + act.log.Debugf("caching port %d fd %d uid %d", l.port, l.origFd, l.uid) + act.listeners[key].app = appListener{fd: l.origFd, uid: l.uid} } if len(listeners) == 0 { return ErrNoListeningSockets @@ -455,6 +460,7 @@ func (act *Activator) listenerFdsFromCache(pid int) ([]listener, error) { network: network, fd: os.NewFile(uintptr(fd), ""), origFd: v.app.fd, + uid: v.app.uid, inode: uint32(stat.Ino), }) } @@ -532,6 +538,7 @@ func (act *Activator) getListeningInodes(pid int) ([]listener, error) { listeners = append(listeners, listener{ port: uint16(sock.LocalPort), inode: uint32(sock.Inode), + uid: int(sock.UID), }) } } @@ -543,6 +550,7 @@ func (act *Activator) getListeningInodes(pid int) ([]listener, error) { listeners = append(listeners, listener{ port: uint16(sock.LocalPort), inode: uint32(sock.Inode), + uid: int(sock.UID), }) } } diff --git a/activator/reuse/probe.go b/activator/reuse/probe.go index 8e21a8d..765108d 100644 --- a/activator/reuse/probe.go +++ b/activator/reuse/probe.go @@ -11,6 +11,8 @@ type probeListener struct { ln net.Listener } +// listenProbe will call listenReuseport and store the newly created listener in +// probe. Needs to be called inside the target network namespace. func (act *Activator) listenProbe(port uint16, network Network, lg *listenerGroup) error { ln, err := listenReuseport(port, network) if err != nil { diff --git a/activator/reuse/sockopt.c b/activator/reuse/sockopt.c index bf38790..ef84811 100644 --- a/activator/reuse/sockopt.c +++ b/activator/reuse/sockopt.c @@ -7,14 +7,14 @@ char __license[] SEC("license") = "Dual MIT/GPL"; -#define SOL_SOCKET 1 -#define SO_REUSEPORT 15 +#define SOL_SOCKET 1 +#define SO_REUSEPORT 15 +#define SOL_IPV6 41 +#define IPV6_V6ONLY 26 -SEC("cgroup/setsockopt") -int setsockopt(struct bpf_sockopt *ctx) +SEC("cgroup/sock_create") +int sockcreate(struct bpf_sock *sk) { - struct bpf_sock *sk = ctx->sk; - if (!sk) return 1; @@ -22,10 +22,31 @@ int setsockopt(struct bpf_sockopt *ctx) return 1; int reuseport_value = 1; - // TODO: - // * check what happens when SO_REUSEPORT is already set - // * do we care about the return code? bpf_setsockopt(sk, SOL_SOCKET, SO_REUSEPORT, &reuseport_value, sizeof(reuseport_value)); return 1; } + +SEC("cgroup/setsockopt") +int setsockopt(struct bpf_sockopt *ctx) +{ + int *optval = ctx->optval; + + if (!optval || (void *)(optval + 1) > ctx->optval_end) { + return 1; + } + + if (ctx->level == SOL_IPV6 && ctx->optname == IPV6_V6ONLY) { + // bpf_printk("disabling ipv6only"); + *optval = 0; + } + + if (ctx->level == SOL_SOCKET && ctx->optname == SO_REUSEPORT) { + if (*optval == 0) { + // bpf_printk("enabling SO_REUSEPORT"); + *optval = 1; + } + } + + return 1; +} diff --git a/activator/reuse/sockopt_bpfeb.go b/activator/reuse/sockopt_bpfeb.go index b80c277..bd478ef 100644 --- a/activator/reuse/sockopt_bpfeb.go +++ b/activator/reuse/sockopt_bpfeb.go @@ -55,6 +55,7 @@ type sockoptSpecs struct { // It can be passed ebpf.CollectionSpec.Assign. type sockoptProgramSpecs struct { Setsockopt *ebpf.ProgramSpec `ebpf:"setsockopt"` + Sockcreate *ebpf.ProgramSpec `ebpf:"sockcreate"` } // sockoptMapSpecs contains maps before they are loaded into the kernel. @@ -106,11 +107,13 @@ type sockoptVariables struct { // It can be passed to loadSockoptObjects or ebpf.CollectionSpec.LoadAndAssign. type sockoptPrograms struct { Setsockopt *ebpf.Program `ebpf:"setsockopt"` + Sockcreate *ebpf.Program `ebpf:"sockcreate"` } func (p *sockoptPrograms) Close() error { return _SockoptClose( p.Setsockopt, + p.Sockcreate, ) } diff --git a/activator/reuse/sockopt_bpfeb.o b/activator/reuse/sockopt_bpfeb.o index aff53362fea5693348c75d8c480a85903a70d924..95563bf22033cf5ecf13372bb2fe5dab955735ed 100644 GIT binary patch literal 3816 zcmbtWO=w(I6h3c~{+YH()oM|Z7k|Q}rqhg;P^_ub*3?9!8IoyfMR+rrd1;1BX2yAM zLZTG|DpYXMg-REKL0wecR1lJd(rlD2x+rv0Tu3)U#g!n~MJ0aUefPe3d2Q*!3-^8J zJNMjk&OP_t``&v)qel}7OTuQ!KaeAea0Eif4aGA0xmB#4U9yF&&@Eeu$86aI*tl$y ziBDBwsvc|U(wFxtitvW6-atHK0WuaR(Q`~9G{ltZ|bP+Ee z<}>gIXy0>0wv!jqvWs}EUp4@G!5`E7KHwudt`wi7cAfo3P^+**+jmJjcxORHg}*LI z(0*A($GW=7zyk>LeW_Wf*sqP`_P(4Q<q=)^IBd7vRbUib#(3o=305+1UmN1S_Hm{PW=+F 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b/activator/reuse/sockopt_bpfel.go @@ -55,6 +55,7 @@ type sockoptSpecs struct { // It can be passed ebpf.CollectionSpec.Assign. type sockoptProgramSpecs struct { Setsockopt *ebpf.ProgramSpec `ebpf:"setsockopt"` + Sockcreate *ebpf.ProgramSpec `ebpf:"sockcreate"` } // sockoptMapSpecs contains maps before they are loaded into the kernel. @@ -106,11 +107,13 @@ type sockoptVariables struct { // It can be passed to loadSockoptObjects or ebpf.CollectionSpec.LoadAndAssign. type sockoptPrograms struct { Setsockopt *ebpf.Program `ebpf:"setsockopt"` + Sockcreate *ebpf.Program `ebpf:"sockcreate"` } func (p *sockoptPrograms) Close() error { return _SockoptClose( p.Setsockopt, + p.Sockcreate, ) } diff --git a/activator/reuse/sockopt_bpfel.o b/activator/reuse/sockopt_bpfel.o index 9d607d008d712e52fd2a5e45a4bddcd4e81e73cd..11ae186769f5dbbbb5871f3c3ca1ed69f68de6e5 100644 GIT binary patch literal 3816 zcmbtXO>9(E6h6}*DA*R-Qf$7>({@x3=q zs~DT82_`OBs9|AZ6Ih^bG%=wI4c%y1upnVWTo^Vc7*{4HvcS~uyYIf4*Gq#7PkP@u 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zDi^luj+pfuj2nJ^$9C7U3H#XCO?e^KM$N-! z+^$q^KQ*b({}bHX5_tqkJc|KR z9P9|{`R9d3fqZ)-G5dzfzYaMZdvUyzq;0iO-eEqgA diff --git a/criu/socket-uid.patch b/criu/socket-uid.patch new file mode 100644 index 0000000..8a16fc1 --- /dev/null +++ b/criu/socket-uid.patch @@ -0,0 +1,61 @@ +diff --git a/criu/include/sk-inet.h b/criu/include/sk-inet.h +index 69ee8589e..0a60fc5bb 100644 +--- a/criu/include/sk-inet.h ++++ b/criu/include/sk-inet.h +@@ -41,6 +41,7 @@ struct inet_sk_desc { + unsigned int dst_addr[4]; + unsigned short shutdown; + bool cork; ++ uid_t uid; + + int rfd; + int cpt_reuseaddr; +diff --git a/criu/sk-inet.c b/criu/sk-inet.c +index 422edc656..73277cd2d 100644 +--- a/criu/sk-inet.c ++++ b/criu/sk-inet.c +@@ -526,6 +526,8 @@ static int do_dump_one_inet_fd(int lfd, u32 id, const struct fd_parms *p, int fa + ie.dst_port = sk->dst_port; + ie.backlog = sk->wqlen; + ie.flags = p->flags; ++ ie.has_uid = true; ++ ie.uid = sk->uid; + + ie.fown = (FownEntry *)&p->fown; + ie.opts = &skopts; +@@ -678,6 +680,8 @@ int inet_collect_one(struct nlmsghdr *h, int family, int type, struct ns_id *ns) + d->wqlen = m->idiag_wqueue; + memcpy(d->src_addr, m->id.idiag_src, sizeof(u32) * 4); + memcpy(d->dst_addr, m->id.idiag_dst, sizeof(u32) * 4); ++ d->uid = m->idiag_uid; ++ pr_info("storing socket uid: %d\n", d->uid); + + if (tb[INET_DIAG_SHUTDOWN]) + d->shutdown = nla_get_u8(tb[INET_DIAG_SHUTDOWN]); +@@ -890,6 +894,16 @@ static int open_inet_sk(struct file_desc *d, int *new_fd) + return -1; + } + ++ if (ie->has_uid) { ++ pr_info("restoring socket uid: %d", ie->uid); ++ if (fchown(sk, ie->uid, -1) < 0) { ++ pr_err("Failed to set socket UID to %u", ie->uid); ++ goto err; ++ } ++ } else { ++ pr_info("socket uid not found! %d\n", ie->uid); ++ } ++ + if (reset_setsockcreatecon()) + goto err; + +diff --git a/images/sk-inet.proto b/images/sk-inet.proto +index 2c709e018..b6fc3e9d8 100644 +--- a/images/sk-inet.proto ++++ b/images/sk-inet.proto +@@ -58,4 +58,5 @@ message inet_sk_entry { + optional uint32 ns_id = 18; + optional sk_shutdown shutdown = 19; + optional tcp_opts_entry tcp_opts = 20; ++ optional uint32 uid = 21; + } diff --git a/go.mod b/go.mod index 80532fd..fa500c1 100644 --- a/go.mod +++ b/go.mod @@ -48,8 +48,6 @@ require ( sigs.k8s.io/kustomize/kyaml v0.16.0 ) -// replace github.com/vishvananda/netlink => ../netlink - require ( al.essio.dev/pkg/shellescape v1.5.1 // indirect dario.cat/mergo v1.0.1 // indirect diff --git a/shim/container.go b/shim/container.go index 0b203c9..a080830 100644 --- a/shim/container.go +++ b/shim/container.go @@ -109,6 +109,13 @@ func New(ctx context.Context, cfg *v1.Config, r *taskAPI.CreateTaskRequest, pt s metrics: newMetrics(cfg, true), runcVersion: vers.Runc, } + + act, err := reuse.New(ctx, c.netNS, c.cfg.Spec.Linux.CgroupsPath, c.activatorOpts(ctx)...) + if err != nil { + return nil, err + } + c.activator = act + return c, nil } @@ -511,6 +518,24 @@ func (c *Container) cancelInit() { c.initTimer.Stop() } +func (c *Container) getListeners(ports ...uint16) reuse.Listeners { + if c.startInfo.skip && len(c.startInfo.listeners) > 0 { + return c.startInfo.listeners + } + listeners := reuse.Listeners{} + for _, port := range ports { + // fallback to just a dual-stack listener for each port. If + // !startInfo.skip, the listeners will anyways be detected from the app + // so this is only relevant if we startInfo.skip and the listeners from + // the startInfo are empty. + listeners = append( + listeners, + reuse.Listener{Port: port, Network: reuse.NetworkTCPAny}, + ) + } + return listeners +} + // startActivator starts the activator func (c *Container) startActivator(ctx context.Context, ports ...uint16) error { if c.activator.Started() { @@ -520,19 +545,8 @@ func (c *Container) startActivator(ctx context.Context, ports ...uint16) error { // log.G(ctx).WithError(err).Error("failed to attach activator") // return err // } - if len(c.startInfo.listeners) == 0 { - for _, port := range ports { - c.startInfo.listeners = append( - c.startInfo.listeners, - // if startInfo was empty, we fall back to tcp4/tcp6 combo - // TODO: we could also try and read it from the checkpoint image - reuse.Listener{Port: port, Network: reuse.NetworkTCP4}, - reuse.Listener{Port: port, Network: reuse.NetworkTCP6ONLY}, - ) - } - } - if err := c.activator.Start(c.context, c.Pid(), c.startInfo.listeners, c.SkipStart()); err != nil { + if err := c.activator.Start(c.context, c.Pid(), c.getListeners(ports...), c.startInfo.skip); err != nil { if errors.Is(err, activator.ErrMapNotFound) { return err } From 03deca53a86ce2a819c178dd830ffa7934251834 Mon Sep 17 00:00:00 2001 From: Cyrill Troxler Date: Sun, 9 Aug 2026 15:49:08 +0200 Subject: [PATCH 14/17] feat: select activator type on config This unifies the two activator APIs into an interface, making it possible to simply switch between them in the shim depending on the config. --- activator/activator.go | 27 ++++-- activator/activator_test.go | 85 ++++++++++--------- activator/interface.go | 45 ++++++++++ activator/reuse/activator.go | 52 ++++-------- activator/reuse/activator_test.go | 34 ++++---- activator/reuse/listener.go | 23 ++--- activator/reuse/probe.go | 4 +- activator/reuse/stub.go | 15 ++++ api/shim/v1/config.go | 3 + cmd/installer/main.go | 8 +- config/reuseport-activator/kustomization.yaml | 9 ++ shim/checkpoint.go | 5 +- shim/container.go | 59 ++++++------- shim/probe.go | 8 +- shim/probe_test.go | 4 +- shim/restore.go | 12 ++- 16 files changed, 235 insertions(+), 158 deletions(-) create mode 100644 activator/interface.go create mode 100644 activator/reuse/stub.go create mode 100644 config/reuseport-activator/kustomization.yaml diff --git a/activator/activator.go b/activator/activator.go index 15b2273..f676173 100644 --- a/activator/activator.go +++ b/activator/activator.go @@ -60,13 +60,15 @@ func SetTargetAddr(addr string) Option { } } -func NewServer(ctx context.Context, nn ns.NetNS, opts ...Option) (*Server, error) { +func NewServer(ctx context.Context, nn ns.NetNS, connHook ConnHook, restoreHook RestoreHook, opts ...Option) (*Server, error) { s := &Server{ quit: make(chan any), connectTimeout: time.Second * 5, proxyTimeout: time.Second * 5, ns: nn, sandboxPid: parsePidFromNetNS(nn), + connHook: connHook, + restoreHook: restoreHook, } return s, nil } @@ -95,10 +97,8 @@ var ( DefaultIfaces = []string{IfaceLoopback, IfaceETH0} ) -func (s *Server) Start(ctx context.Context, connHook ConnHook, restoreHook RestoreHook, ports ...uint16) error { - s.connHook = connHook - s.restoreHook = restoreHook - s.ports = ports +func (s *Server) Start(ctx context.Context, _ int, listeners Listeners, skipStart bool) error { + s.ports = listeners.Ports() if err := s.loadPinnedMaps(); err != nil { return err @@ -122,10 +122,24 @@ func (s *Server) Start(ctx context.Context, connHook ConnHook, restoreHook Resto } } + if skipStart { + if err := s.Reset(); err != nil { + return err + } + } + s.started = true return nil } +func (act *Server) GetListeners() []Listener { + listeners := []Listener{} + for _, port := range act.ports { + listeners = append(listeners, Listener{Port: port}) + } + return listeners +} + const AttachActivatorFlag = "-zeropod-attach-activator" // AttachExec attaches the activator using exec on itself. @@ -176,12 +190,13 @@ func (s *Server) SetPeekBufferSize(size int) { // ForwardToTarget instructs the activator to forward any incoming traffic to // the specified address. The connHook and restoreHook will both be disabled. -func (s *Server) ForwardToTarget(addr string) { +func (s *Server) ForwardToTarget(_ context.Context, addr string) error { // disable hooks s.connHook = func(c net.Conn) (net.Conn, bool, error) { return c, true, nil } s.restoreHook = func() (int, error) { return 0, nil } s.targetAddr = addr s.forwardToTarget = true + return nil } func (s *Server) listen(ctx context.Context, port uint16) (int, error) { diff --git a/activator/activator_test.go b/activator/activator_test.go index 7fe3488..f8137c7 100644 --- a/activator/activator_test.go +++ b/activator/activator_test.go @@ -146,7 +146,12 @@ func TestActivator(t *testing.T) { for name, tc := range tests { t.Run(name, func(t *testing.T) { ctx, cancel := context.WithCancel(context.Background()) - s, err := NewServer(ctx, nn) + if tc.connHook == nil { + tc.connHook = func(c net.Conn) (net.Conn, bool, error) { + return c, true, nil + } + } + s, err := NewServer(ctx, nn, tc.connHook, func() (int, error) { return 0, nil }) require.NoError(t, err) port, err := freePort() @@ -233,56 +238,52 @@ func startServer(t *testing.T, ctx context.Context, s *Server, port uint16, tc * ts := httptest.NewUnstartedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { fmt.Fprint(w, response) })) - if tc.connHook == nil { - tc.connHook = func(c net.Conn) (net.Conn, bool, error) { - return c, true, nil - } - } once := sync.Once{} loopIterations := 0 - err := s.Start( - ctx, - tc.connHook, - func() (int, error) { - if tc.loopConnection { - loopIterations += 1 - if loopIterations > 10 { - t.Error("loop detection failed") - return 0, fmt.Errorf("loop detection failed") - } - // return nil + s.restoreHook = func() (int, error) { + if tc.loopConnection { + loopIterations += 1 + if loopIterations > 10 { + t.Error("loop detection failed") + return 0, fmt.Errorf("loop detection failed") } - once.Do(func() { - // simulate a delay until our server is started - time.Sleep(time.Millisecond * 200) - network := "tcp4" - if tc.ipv6 { - network = "tcp6" - } - l, err := net.Listen(network, fmt.Sprintf(":%d", port)) - require.NoError(t, err) + // return nil + } + once.Do(func() { + // simulate a delay until our server is started + time.Sleep(time.Millisecond * 200) + network := "tcp4" + if tc.ipv6 { + network = "tcp6" + } + l, err := net.Listen(network, fmt.Sprintf(":%d", port)) + require.NoError(t, err) - if !tc.loopConnection { - if err := s.DisableRedirects(); err != nil { - t.Errorf("could not disable redirects: %s", err) - } + if !tc.loopConnection { + if err := s.DisableRedirects(); err != nil { + t.Errorf("could not disable redirects: %s", err) } + } - // replace listener of server - ts.Listener.Close() - ts.Listener = l - ts.Start() - t.Logf("listening on %s", l.Addr().String()) + // replace listener of server + ts.Listener.Close() + ts.Listener = l + ts.Start() + t.Logf("listening on %s", l.Addr().String()) - t.Cleanup(func() { - l.Close() - ts.Close() - }) + t.Cleanup(func() { + l.Close() + ts.Close() }) - return 0, nil - }, - port, + }) + return 0, nil + } + err := s.Start( + ctx, + 0, + Listeners{{Port: port}}, + false, ) require.NoError(t, err) s.enableRedirect(port) diff --git a/activator/interface.go b/activator/interface.go new file mode 100644 index 0000000..4834223 --- /dev/null +++ b/activator/interface.go @@ -0,0 +1,45 @@ +package activator + +import ( + "context" + "maps" + "slices" + "time" +) + +type Activator interface { + Start(ctx context.Context, pid int, listeners Listeners, skipStart bool) error + Started() bool + Reset() error + DisableRedirects() error + AttachExec() error + SetProxyTimeout(d time.Duration) + SetConnectTimeout(d time.Duration) + LastActivity(port uint16) (time.Time, error) + Stop(ctx context.Context) + GetListeners() []Listener + ForwardToTarget(ctx context.Context, addr string) error +} + +type Network string + +const ( + NetworkTCP4 Network = "tcp4" + NetworkTCPAny Network = "tcp" + NetworkTCP6ONLY Network = "tcp6" +) + +type Listener struct { + Port uint16 + Network Network +} + +type Listeners []Listener + +func (lns Listeners) Ports() []uint16 { + ports := map[uint16]struct{}{} + for _, ln := range lns { + ports[ln.Port] = struct{}{} + } + return slices.Collect(maps.Keys(ports)) +} diff --git a/activator/reuse/activator.go b/activator/reuse/activator.go index 4b3b8ec..bd527c7 100644 --- a/activator/reuse/activator.go +++ b/activator/reuse/activator.go @@ -3,12 +3,10 @@ package reuse import ( "context" "fmt" - "maps" "net" "net/netip" "os" "path/filepath" - "slices" "strconv" "strings" "sync" @@ -29,14 +27,6 @@ import ( //go:generate go run github.com/cilium/ebpf/cmd/bpf2go -cc $BPF_CLANG -cflags $BPF_CFLAGS sockopt sockopt.c //go:generate go run github.com/cilium/ebpf/cmd/bpf2go -cc $BPF_CLANG -cflags $BPF_CFLAGS tracker tracker.c -type Network string - -const ( - NetworkTCP4 Network = "tcp4" - NetworkTCPAny Network = "tcp" - NetworkTCP6ONLY Network = "tcp6" -) - type Activator struct { *Config ports []uint16 @@ -179,12 +169,16 @@ func ProbeAddr(addr *netip.Addr) Option { } } -func (act *Activator) Start(ctx context.Context, pid int, listeners Listeners, skipStart bool) error { +func (act *Activator) Start(ctx context.Context, pid int, listeners activator.Listeners, skipStart bool) error { act.ports = listeners.Ports() if skipStart { for _, ln := range listeners { - key := listenerKey{port: ln.Port, network: ln.Network} + net := ln.Network + if net == "" { + net = activator.NetworkTCPAny + } + key := listenerKey{port: ln.Port, network: net} objs := &reuseportObjects{} if err := loadReuseportObjects(objs, &ebpf.CollectionOptions{}); err != nil { return fmt.Errorf("loading reuseport objects: %w", err) @@ -198,7 +192,7 @@ func (act *Activator) Start(ctx context.Context, pid int, listeners Listeners, s act.listeners[key] = &listenerGroup{reuse: objs} act.mu.Unlock() } - if err := act.ScaleDown(); err != nil { + if err := act.Reset(); err != nil { return err } } else { @@ -218,7 +212,7 @@ func (act *Activator) Started() bool { return act.started.Load() } -func (act *Activator) Stop() error { +func (act *Activator) Stop(_ context.Context) { act.mu.Lock() defer act.mu.Unlock() for _, ln := range act.listeners { @@ -244,7 +238,6 @@ func (act *Activator) Stop() error { if act.trackerLink != nil { act.trackerLink.Close() } - return nil } func (act *Activator) LastActivity(port uint16) (time.Time, error) { @@ -368,7 +361,7 @@ func IgnoreAddr(addrMap *ebpf.Map, ip string) error { return addrMap.Put(&key, value) } -func (act *Activator) wake(network Network) error { +func (act *Activator) wake(network activator.Network) error { closeProbe := false if act.restoreHook != nil { pid, err := act.restoreHook() @@ -413,10 +406,10 @@ func (act *Activator) wake(network Network) error { return nil } -func (act *Activator) poke(port uint16, network Network) error { +func (act *Activator) poke(port uint16, network activator.Network) error { return act.ns.Do(func(nn ns.NetNS) error { addr := fmt.Sprintf("127.0.0.1:%d", port) - if network == NetworkTCPAny || network == NetworkTCP6ONLY { + if network == activator.NetworkTCPAny || network == activator.NetworkTCP6ONLY { addr = fmt.Sprintf("[::1]:%d", port) } dialer := net.Dialer{Timeout: time.Second} @@ -428,7 +421,7 @@ func (act *Activator) poke(port uint16, network Network) error { }) } -func (act *Activator) ScaleDown() error { +func (act *Activator) Reset() error { act.mu.Lock() defer act.mu.Unlock() act.registeredWake.Store(false) @@ -470,25 +463,10 @@ func (act *Activator) ScaleDown() error { return nil } -type Listener struct { - Port uint16 - Network Network -} - -type Listeners []Listener - -func (act *Activator) GetListeners() []Listener { - listeners := []Listener{} +func (act *Activator) GetListeners() []activator.Listener { + listeners := []activator.Listener{} for k := range act.listeners { - listeners = append(listeners, Listener{Port: k.port, Network: k.network}) + listeners = append(listeners, activator.Listener{Port: k.port, Network: k.network}) } return listeners } - -func (lns Listeners) Ports() []uint16 { - ports := map[uint16]struct{}{} - for _, ln := range lns { - ports[ln.Port] = struct{}{} - } - return slices.Collect(maps.Keys(ports)) -} diff --git a/activator/reuse/activator_test.go b/activator/reuse/activator_test.go index 5b01a40..fa6d38d 100644 --- a/activator/reuse/activator_test.go +++ b/activator/reuse/activator_test.go @@ -35,7 +35,7 @@ type testCase struct { expectLastActivity bool trackerIgnoreLocalhost bool kubeletAddr *netip.Addr - networks []Network + networks []activator.Network forwardToFunc func(t *testing.T, port int) (string, *httptest.Server) } @@ -63,7 +63,7 @@ func TestReuseActivator(t *testing.T) { expectedBody: "app", expectedCode: http.StatusOK, expectLastActivity: true, - networks: []Network{NetworkTCP4}, + networks: []activator.Network{activator.NetworkTCP4}, }, "ipv6 only": { parallelReqs: 1, @@ -71,7 +71,7 @@ func TestReuseActivator(t *testing.T) { expectedBody: "app", expectedCode: http.StatusOK, expectLastActivity: true, - networks: []Network{NetworkTCP6ONLY}, + networks: []activator.Network{activator.NetworkTCP6ONLY}, }, "100 in parallel": { parallelReqs: 100, @@ -79,7 +79,7 @@ func TestReuseActivator(t *testing.T) { expectedBody: "app", expectedCode: http.StatusOK, expectLastActivity: true, - networks: []Network{NetworkTCPAny}, + networks: []activator.Network{activator.NetworkTCPAny}, }, "ignore activity from localhost v4": { parallelReqs: 1, @@ -88,7 +88,7 @@ func TestReuseActivator(t *testing.T) { expectedCode: http.StatusOK, expectLastActivity: false, trackerIgnoreLocalhost: true, - networks: []Network{NetworkTCP4}, + networks: []activator.Network{activator.NetworkTCP4}, }, "ignore activity from localhost v6": { parallelReqs: 1, @@ -97,7 +97,7 @@ func TestReuseActivator(t *testing.T) { expectedCode: http.StatusOK, expectLastActivity: false, trackerIgnoreLocalhost: true, - networks: []Network{NetworkTCPAny}, + networks: []activator.Network{activator.NetworkTCPAny}, }, "ignore kubelet traffic ipv4": { parallelReqs: 1, @@ -106,7 +106,7 @@ func TestReuseActivator(t *testing.T) { expectedCode: http.StatusOK, expectLastActivity: false, kubeletAddr: ptr.To(netip.MustParseAddr("127.0.0.1")), - networks: []Network{NetworkTCP4}, + networks: []activator.Network{activator.NetworkTCP4}, }, "ignore kubelet traffic ipv6": { parallelReqs: 1, @@ -115,7 +115,7 @@ func TestReuseActivator(t *testing.T) { expectedCode: http.StatusOK, expectLastActivity: false, kubeletAddr: ptr.To(netip.MustParseAddr("::1")), - networks: []Network{NetworkTCPAny}, + networks: []activator.Network{activator.NetworkTCPAny}, }, "forward": { parallelReqs: 1, @@ -123,7 +123,7 @@ func TestReuseActivator(t *testing.T) { expectedBody: "hello from another server", expectedCode: http.StatusOK, expectLastActivity: true, - networks: []Network{NetworkTCP4}, + networks: []activator.Network{activator.NetworkTCP4}, forwardToFunc: func(t *testing.T, port int) (string, *httptest.Server) { ts := httptest.NewUnstartedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { fmt.Fprint(w, "hello from another server") @@ -146,7 +146,7 @@ func TestReuseActivator(t *testing.T) { expectedBody: "app", expectedCode: http.StatusOK, expectLastActivity: true, - networks: []Network{NetworkTCPAny}, + networks: []activator.Network{activator.NetworkTCPAny}, }, "ipv4 and ipv6": { parallelReqs: 1, @@ -154,7 +154,7 @@ func TestReuseActivator(t *testing.T) { expectedBody: "app", expectedCode: http.StatusOK, expectLastActivity: true, - networks: []Network{NetworkTCPAny}, + networks: []activator.Network{activator.NetworkTCPAny}, }, } wg := sync.WaitGroup{} @@ -191,9 +191,9 @@ func TestReuseActivator(t *testing.T) { cancel() }) - listeners := Listeners{} + listeners := activator.Listeners{} for _, net := range tc.networks { - listeners = append(listeners, Listener{Port: uint16(port), Network: net}) + listeners = append(listeners, activator.Listener{Port: uint16(port), Network: net}) } require.NoError(t, s.Start(ctx, os.Getpid(), listeners, true)) if tc.forwardToFunc != nil { @@ -208,7 +208,7 @@ func TestReuseActivator(t *testing.T) { for _, net := range tc.networks { wg.Go(func() { host := "127.0.0.1" - if net == NetworkTCP6ONLY || net == NetworkTCPAny { + if net == activator.NetworkTCP6ONLY || net == activator.NetworkTCPAny { host = "[::1]" } @@ -233,7 +233,7 @@ func TestReuseActivator(t *testing.T) { } } wg.Wait() - assert.NoError(t, s.ScaleDown()) + assert.NoError(t, s.Reset()) for _, ln := range s.listeners { if err := ln.reuse.Listeners.Delete(uint32(appKey)); err != nil { if !errors.Is(err, ebpf.ErrKeyNotExist) { @@ -260,14 +260,14 @@ func TestReuseActivator(t *testing.T) { assert.ErrorIs(t, err, activator.NoActivityRecordedErr{}) } cancel() - assert.NoError(t, s.Stop()) + s.Stop(ctx) assert.NoError(t, cmd.Process.Kill()) _ = cmd.Wait() }) } } -func runApp(t *testing.T, port int, networks ...Network) (*exec.Cmd, error) { +func runApp(t *testing.T, port int, networks ...activator.Network) (*exec.Cmd, error) { cmd := exec.Command(os.Args[0], "-test.run=^TestReuseActivator$") nets := []string{} diff --git a/activator/reuse/listener.go b/activator/reuse/listener.go index 4073db4..059dafc 100644 --- a/activator/reuse/listener.go +++ b/activator/reuse/listener.go @@ -14,6 +14,7 @@ import ( "time" "github.com/cilium/ebpf" + "github.com/ctrox/zeropod/activator" "github.com/prometheus/procfs" "golang.org/x/sys/unix" ) @@ -40,12 +41,12 @@ type appListener struct { type listenerKey struct { port uint16 - network Network + network activator.Network } type listener struct { port uint16 - network Network + network activator.Network inode uint32 origFd int fd *os.File @@ -73,7 +74,7 @@ func (wl *wakeListener) close() { // listenWake will call listenReuseport and store the newly created listener in // wake. Needs to be called inside the target network namespace. -func (act *Activator) listenWake(port uint16, network Network, lg *listenerGroup) error { +func (act *Activator) listenWake(port uint16, network activator.Network, lg *listenerGroup) error { act.log.Debugf("listening wake: %d %s", port, network) ln, err := listenReuseport(port, network) if err != nil { @@ -83,7 +84,7 @@ func (act *Activator) listenWake(port uint16, network Network, lg *listenerGroup return nil } -func (act *Activator) attachWake(network Network, lg *listenerGroup) error { +func (act *Activator) attachWake(network activator.Network, lg *listenerGroup) error { var dupFd int var dupErr error if err := act.attachNetListener(lg.wake.ln, wakeKey, lg.reuse.Listeners, lg.reuse.SelectOrMigrate, func(fd uintptr) { @@ -120,7 +121,7 @@ func (act *Activator) attachWake(network Network, lg *listenerGroup) error { // watchWake polls the wake listener without ever accepting and calls wake as // soon as the poll returns something. -func (act *Activator) watchWake(epfd int, fd uintptr, stopFd int, network Network) { +func (act *Activator) watchWake(epfd int, fd uintptr, stopFd int, network activator.Network) { defer func() { _ = unix.Close(int(fd)) _ = unix.Close(epfd) @@ -312,18 +313,18 @@ func (act *Activator) listenerFds(pid int) ([]listener, error) { return listenersWithFd, nil } -func getNetworkFromSock(fd int) (Network, error) { +func getNetworkFromSock(fd int) (activator.Network, error) { domain, err := unix.GetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_DOMAIN) if err != nil { - return Network(""), err + return activator.Network(""), err } if domain == unix.AF_INET6 { if v, err := unix.GetsockoptInt(fd, unix.IPPROTO_IPV6, unix.IPV6_V6ONLY); err == nil && v == 1 { - return NetworkTCP6ONLY, nil + return activator.NetworkTCP6ONLY, nil } - return NetworkTCPAny, nil + return activator.NetworkTCPAny, nil } - return NetworkTCP4, nil + return activator.NetworkTCP4, nil } // attachListener attaches select_or_migrate to the listeners reuseport group @@ -367,7 +368,7 @@ func (act *Activator) attachNetListener(ln net.Listener, key uint32, bpfMap *ebp } // listenReuseport opens a TCP listener with SO_REUSEPORT -func listenReuseport(port uint16, network Network) (*net.TCPListener, error) { +func listenReuseport(port uint16, network activator.Network) (*net.TCPListener, error) { lc := net.ListenConfig{ Control: func(_, _ string, c syscall.RawConn) error { var serr error diff --git a/activator/reuse/probe.go b/activator/reuse/probe.go index 765108d..7aada15 100644 --- a/activator/reuse/probe.go +++ b/activator/reuse/probe.go @@ -5,6 +5,8 @@ import ( "fmt" "net" "time" + + "github.com/ctrox/zeropod/activator" ) type probeListener struct { @@ -13,7 +15,7 @@ type probeListener struct { // listenProbe will call listenReuseport and store the newly created listener in // probe. Needs to be called inside the target network namespace. -func (act *Activator) listenProbe(port uint16, network Network, lg *listenerGroup) error { +func (act *Activator) listenProbe(port uint16, network activator.Network, lg *listenerGroup) error { ln, err := listenReuseport(port, network) if err != nil { return fmt.Errorf("wake listener: %w", err) diff --git a/activator/reuse/stub.go b/activator/reuse/stub.go new file mode 100644 index 0000000..c4a7035 --- /dev/null +++ b/activator/reuse/stub.go @@ -0,0 +1,15 @@ +package reuse + +import "time" + +func (act *Activator) DisableRedirects() error { + return nil +} + +func (act *Activator) AttachExec() error { + return nil +} + +func (act *Activator) SetProxyTimeout(d time.Duration) {} + +func (act *Activator) SetConnectTimeout(d time.Duration) {} diff --git a/api/shim/v1/config.go b/api/shim/v1/config.go index 449d76d..7d0ff78 100644 --- a/api/shim/v1/config.go +++ b/api/shim/v1/config.go @@ -55,6 +55,7 @@ const ( DefaultProbeBinaryName = "kubelet" DefaultTrackerIgnoreLocalhost = true DefaultCapacityRequest = false + DefaultReuseportActivator = false ) var ContainerdAnnotations = []string{ @@ -99,6 +100,7 @@ type Config struct { TrackerIgnoreLocalhost bool `json:"trackerIgnoreLocalhost"` CapacityRequest bool `json:"capacityRequest"` ProbeAddress string `json:"probeAddress"` + ReuseportActivator bool `json:"reuseportActivator"` AnnotationConfig `json:"-"` } @@ -230,6 +232,7 @@ func NewConfig(ctx context.Context, spec *specs.Spec) (*Config, error) { cfg := &Config{ TrackerIgnoreLocalhost: DefaultTrackerIgnoreLocalhost, CapacityRequest: DefaultCapacityRequest, + ReuseportActivator: DefaultReuseportActivator, } path, err := relativeConfigFile() if err != nil { diff --git a/cmd/installer/main.go b/cmd/installer/main.go index 29e8ac1..33eebcb 100644 --- a/cmd/installer/main.go +++ b/cmd/installer/main.go @@ -40,6 +40,7 @@ var ( versionFlag = flag.Bool("version", false, "output version and exit") trackerIgnoreLocalhost = flag.Bool("tracker-ignore-localhost", v1.DefaultTrackerIgnoreLocalhost, "set to ignore traffic from localhost in socket tracker") capacityRequest = flag.Bool("capacity-request", v1.DefaultCapacityRequest, "enable shim to make a capacity request before restoring") + reuseportActivator = flag.Bool("reuseport-activator", v1.DefaultReuseportActivator, "enable the new reuseport activator") //lint:ignore U1000 kept for compatibility probeBinaryName = flag.String("probe-binary-name", v1.DefaultProbeBinaryName, "Deprecated: this is no longer used, flag will be removed in future release") @@ -233,10 +234,15 @@ func installRuntime(ctx context.Context, runtime containerRuntime) error { cfg, err := v1.Load(opt) if err != nil { - return fmt.Errorf("loading config: %w", err) + if !os.IsNotExist(err) { + return fmt.Errorf("loading config: %w", err) + } + log.Printf("existing config not found, creating from scratch") + cfg = &v1.Config{} } cfg.TrackerIgnoreLocalhost = *trackerIgnoreLocalhost cfg.CapacityRequest = *capacityRequest + cfg.ReuseportActivator = *reuseportActivator if err := cfg.Write(opt); err != nil { return fmt.Errorf("writing config: %w", err) } diff --git a/config/reuseport-activator/kustomization.yaml b/config/reuseport-activator/kustomization.yaml new file mode 100644 index 0000000..e1fed53 --- /dev/null +++ b/config/reuseport-activator/kustomization.yaml @@ -0,0 +1,9 @@ +apiVersion: kustomize.config.k8s.io/v1alpha1 +kind: Component +patches: + - patch: |- + - op: add + path: /spec/template/spec/initContainers/0/args/- + value: -reuseport-activator=true + target: + kind: DaemonSet diff --git a/shim/checkpoint.go b/shim/checkpoint.go index f6fabe2..f2f96fd 100644 --- a/shim/checkpoint.go +++ b/shim/checkpoint.go @@ -24,7 +24,7 @@ func (c *Container) scaleDown(ctx context.Context) error { return nil } - if err := c.activator.ScaleDown(); err != nil { + if err := c.activator.Reset(); err != nil { return err } @@ -94,8 +94,7 @@ func (c *Container) checkpoint(ctx context.Context) error { resetOnErr := func() { c.DeleteCheckpointedPID(c.Pid()) - // TODO: implement? - // _ = c.activator.DisableRedirects() + _ = c.activator.DisableRedirects() lines := printCriuLogs(ctx, filepath.Join(workDir, "dump.log")) c.sendFailEvent(v1.ContainerPhase_CHECKPOINT_FAILED, lines) } diff --git a/shim/container.go b/shim/container.go index a080830..27c9e22 100644 --- a/shim/container.go +++ b/shim/container.go @@ -33,7 +33,7 @@ type HandleStartedFunc func(*runc.Container, process.Process) type startInfo struct { skip bool - listeners reuse.Listeners + listeners activator.Listeners } type Container struct { @@ -45,7 +45,7 @@ type Container struct { context context.Context id string createOpts *anypb.Any - activator *reuse.Activator + activator activator.Activator cfg *v1.Config initialProcess process.Process process process.Process @@ -110,11 +110,14 @@ func New(ctx context.Context, cfg *v1.Config, r *taskAPI.CreateTaskRequest, pt s runcVersion: vers.Runc, } - act, err := reuse.New(ctx, c.netNS, c.cfg.Spec.Linux.CgroupsPath, c.activatorOpts(ctx)...) - if err != nil { - return nil, err + if c.cfg.ReuseportActivator { + log.G(ctx).Info("using reuseport activator") + act, err := reuse.New(ctx, c.netNS, c.cfg.Spec.Linux.CgroupsPath, c.activatorOpts(ctx)...) + if err != nil { + return nil, err + } + c.activator = act } - c.activator = act return c, nil } @@ -169,8 +172,10 @@ func (c *Container) reloadConfig(ctx context.Context) error { if len(c.cfg.Ports) == 0 { c.cfg.Ports = ports } - if err := c.activator.Reload(c.activatorOpts(ctx)...); err != nil { - return err + if act, ok := c.activator.(*reuse.Activator); ok { + if err := act.Reload(c.activatorOpts(ctx)...); err != nil { + return err + } } c.lastConfigReload = c.cfg.LastModified() return nil @@ -342,7 +347,7 @@ func (c *Container) InitialProcess() process.Process { func (c *Container) StopActivator(ctx context.Context) { if c.activator != nil { - c.activator.Stop() + c.activator.Stop(ctx) } } @@ -442,18 +447,19 @@ func (c *Container) activatorOpts(ctx context.Context) []reuse.Option { func (c *Container) initActivator(ctx context.Context) error { c.cancelInit() - if c.activator == nil { - act, err := reuse.New(ctx, c.netNS, c.cfg.Spec.Linux.CgroupsPath, c.activatorOpts(ctx)...) + if c.activator == nil && !c.cfg.ReuseportActivator { + log.G(ctx).Info("using legacy activator") + act, err := activator.NewServer(ctx, c.netNS, c.detectProbe(ctx), c.restoreHandler(c.context)) if err != nil { return err } - // if c.cfg.ProxyTimeout > 0 { - // act.SetProxyTimeout(c.cfg.ProxyTimeout) - // } - // if c.cfg.ConnectTimeout > 0 { - // act.SetConnectTimeout(c.cfg.ConnectTimeout) - // } c.activator = act + if c.cfg.ProxyTimeout > 0 { + c.activator.SetProxyTimeout(c.cfg.ProxyTimeout) + } + if c.cfg.ConnectTimeout > 0 { + c.activator.SetConnectTimeout(c.cfg.ConnectTimeout) + } } if len(c.cfg.Ports) == 0 { @@ -480,11 +486,6 @@ func (c *Container) initActivator(ctx context.Context) error { } return err } - - if c.startInfo.skip { - // this is no longer needed with the new activator - // return c.activator.ScaleDown() - } return nil } @@ -518,11 +519,11 @@ func (c *Container) cancelInit() { c.initTimer.Stop() } -func (c *Container) getListeners(ports ...uint16) reuse.Listeners { +func (c *Container) getListeners(ports ...uint16) activator.Listeners { if c.startInfo.skip && len(c.startInfo.listeners) > 0 { return c.startInfo.listeners } - listeners := reuse.Listeners{} + listeners := activator.Listeners{} for _, port := range ports { // fallback to just a dual-stack listener for each port. If // !startInfo.skip, the listeners will anyways be detected from the app @@ -530,7 +531,7 @@ func (c *Container) getListeners(ports ...uint16) reuse.Listeners { // the startInfo are empty. listeners = append( listeners, - reuse.Listener{Port: port, Network: reuse.NetworkTCPAny}, + activator.Listener{Port: port, Network: activator.NetworkTCPAny}, ) } return listeners @@ -541,10 +542,10 @@ func (c *Container) startActivator(ctx context.Context, ports ...uint16) error { if c.activator.Started() { return nil } - // if err := c.activator.AttachExec(); err != nil { - // log.G(ctx).WithError(err).Error("failed to attach activator") - // return err - // } + if err := c.activator.AttachExec(); err != nil { + log.G(ctx).WithError(err).Error("failed to attach activator") + return err + } if err := c.activator.Start(c.context, c.Pid(), c.getListeners(ports...), c.startInfo.skip); err != nil { if errors.Is(err, activator.ErrMapNotFound) { diff --git a/shim/probe.go b/shim/probe.go index 10f15ed..e3905a1 100644 --- a/shim/probe.go +++ b/shim/probe.go @@ -39,14 +39,18 @@ func (c *Container) detectProbe(ctx context.Context) activator.ConnHook { } } -func isKubeletAddr(ctx context.Context, remoteAddr net.Addr, activator *activator.Server) bool { +func isKubeletAddr(ctx context.Context, remoteAddr net.Addr, act activator.Activator) bool { + srv, ok := act.(*activator.Server) + if !ok { + return false + } tcpAddr, ok := remoteAddr.(*net.TCPAddr) if !ok { log.G(ctx).Debugf("remoteAddr is not a *net.TCPAddr: %T", remoteAddr) return false } remoteIPAddr := tcpAddr.AddrPort().Addr().Unmap() - kubeletAddr, err := activator.GetKubeletAddr(remoteIPAddr.Is6()) + kubeletAddr, err := srv.GetKubeletAddr(remoteIPAddr.Is6()) if err != nil { log.G(ctx).WithError(err).Debug("getting kubelet addr") return false diff --git a/shim/probe_test.go b/shim/probe_test.go index f512658..c856439 100644 --- a/shim/probe_test.go +++ b/shim/probe_test.go @@ -90,8 +90,8 @@ func TestDetectProbe(t *testing.T) { act.SetKubeletAddr(ptr.To(netip.MustParseAddr("127.0.0.1"))) } c := &Container{ - cfg: &v1.Config{AnnotationConfig: v1.AnnotationConfig{ProbeBufferSize: v1.DefaultProbeBufferSize}}, - // activator: act, + cfg: &v1.Config{AnnotationConfig: v1.AnnotationConfig{ProbeBufferSize: v1.DefaultProbeBufferSize}}, + activator: act, } newConn, cont, err := c.detectProbe(ctx)(conn) require.NoError(t, err) diff --git a/shim/restore.go b/shim/restore.go index 450d749..c8e6018 100644 --- a/shim/restore.go +++ b/shim/restore.go @@ -23,7 +23,6 @@ import ( "github.com/containerd/ttrpc" "github.com/containernetworking/plugins/pkg/ns" "github.com/ctrox/zeropod/activator" - "github.com/ctrox/zeropod/activator/reuse" nodev1 "github.com/ctrox/zeropod/api/node/v1" v1 "github.com/ctrox/zeropod/api/shim/v1" crio "github.com/ctrox/zeropod/shim/io" @@ -144,10 +143,9 @@ func (c *Container) restore(ctx context.Context) (*runc.Container, process.Proce } // process is running again, we don't need to redirect traffic anymore - // TODO: probably no longer needed with the reuse activator? - // if err := c.activator.DisableRedirects(); err != nil { - // return nil, nil, fmt.Errorf("could not disable redirects: %w", err) - // } + if err := c.activator.DisableRedirects(); err != nil { + return nil, nil, fmt.Errorf("could not disable redirects: %w", err) + } return container, p, nil } @@ -281,9 +279,9 @@ func MigrationRestore(ctx context.Context, r *task.CreateTaskRequest, cfg *v1.Co } if !resp.MigrationInfo.LiveMigration { - listeners := reuse.Listeners{} + listeners := activator.Listeners{} for _, ln := range resp.MigrationInfo.Listeners { - listeners = append(listeners, reuse.Listener{Port: uint16(ln.Port), Network: reuse.Network(ln.Network)}) + listeners = append(listeners, activator.Listener{Port: uint16(ln.Port), Network: activator.Network(ln.Network)}) } return startInfo{skip: true, listeners: listeners}, nil } From 3ee5b6ab631fa12b8f2eb5609a21676d063c656f Mon Sep 17 00:00:00 2001 From: Cyrill Troxler Date: Sun, 9 Aug 2026 17:03:48 +0200 Subject: [PATCH 15/17] fix: remove sock_create program --- activator/reuse/activator.go | 14 -------------- activator/reuse/sockopt.c | 23 +++++++++-------------- activator/reuse/sockopt_bpfeb.go | 3 --- activator/reuse/sockopt_bpfeb.o | Bin 3816 -> 3104 bytes activator/reuse/sockopt_bpfel.go | 3 --- activator/reuse/sockopt_bpfel.o | Bin 3816 -> 3104 bytes 6 files changed, 9 insertions(+), 34 deletions(-) diff --git a/activator/reuse/activator.go b/activator/reuse/activator.go index bd527c7..eb195a6 100644 --- a/activator/reuse/activator.go +++ b/activator/reuse/activator.go @@ -36,7 +36,6 @@ type Activator struct { log *log.Entry ns ns.NetNS started atomic.Bool - sockCreateLink link.Link sockOptLink link.Link sockoptObjects *sockoptObjects trackerLink link.Link @@ -91,16 +90,6 @@ func (act *Activator) LoadBPF() error { return fmt.Errorf("loading sockopt objects: %w", err) } act.sockoptObjects = sockoptObjs - - sockCreateLink, err := link.AttachCgroup(link.CgroupOptions{ - Path: hostCgroupPath, - Attach: ebpf.AttachCGroupInetSockCreate, - Program: sockoptObjs.Sockcreate, - }) - if err != nil { - return err - } - act.sockCreateLink = sockCreateLink sockOptLink, err := link.AttachCgroup(link.CgroupOptions{ Path: hostCgroupPath, Attach: ebpf.AttachCGroupSetsockopt, @@ -226,9 +215,6 @@ func (act *Activator) Stop(_ context.Context) { if act.sockoptObjects != nil { act.sockoptObjects.Close() } - if act.sockCreateLink != nil { - act.sockCreateLink.Close() - } if act.sockOptLink != nil { act.sockOptLink.Close() } diff --git a/activator/reuse/sockopt.c b/activator/reuse/sockopt.c index ef84811..fd4fd60 100644 --- a/activator/reuse/sockopt.c +++ b/activator/reuse/sockopt.c @@ -12,9 +12,16 @@ char __license[] SEC("license") = "Dual MIT/GPL"; #define SOL_IPV6 41 #define IPV6_V6ONLY 26 -SEC("cgroup/sock_create") -int sockcreate(struct bpf_sock *sk) +SEC("cgroup/setsockopt") +int setsockopt(struct bpf_sockopt *ctx) { + int *optval = ctx->optval; + struct bpf_sock *sk = ctx->sk; + + if (!optval || (void *)(optval + 1) > ctx->optval_end) { + return 1; + } + if (!sk) return 1; @@ -24,18 +31,6 @@ int sockcreate(struct bpf_sock *sk) int reuseport_value = 1; bpf_setsockopt(sk, SOL_SOCKET, SO_REUSEPORT, &reuseport_value, sizeof(reuseport_value)); - return 1; -} - -SEC("cgroup/setsockopt") -int setsockopt(struct bpf_sockopt *ctx) -{ - int *optval = ctx->optval; - - if (!optval || (void *)(optval + 1) > ctx->optval_end) { - return 1; - } - if (ctx->level == SOL_IPV6 && ctx->optname == IPV6_V6ONLY) { // bpf_printk("disabling ipv6only"); *optval = 0; diff --git a/activator/reuse/sockopt_bpfeb.go b/activator/reuse/sockopt_bpfeb.go index bd478ef..b80c277 100644 --- a/activator/reuse/sockopt_bpfeb.go +++ b/activator/reuse/sockopt_bpfeb.go @@ -55,7 +55,6 @@ type sockoptSpecs struct { // It can be passed ebpf.CollectionSpec.Assign. type sockoptProgramSpecs struct { Setsockopt *ebpf.ProgramSpec `ebpf:"setsockopt"` - Sockcreate *ebpf.ProgramSpec `ebpf:"sockcreate"` } // sockoptMapSpecs contains maps before they are loaded into the kernel. @@ -107,13 +106,11 @@ type sockoptVariables struct { // It can be passed to loadSockoptObjects or ebpf.CollectionSpec.LoadAndAssign. type sockoptPrograms struct { Setsockopt *ebpf.Program `ebpf:"setsockopt"` - Sockcreate *ebpf.Program `ebpf:"sockcreate"` } func (p *sockoptPrograms) Close() error { return _SockoptClose( p.Setsockopt, - p.Sockcreate, ) } diff --git a/activator/reuse/sockopt_bpfeb.o b/activator/reuse/sockopt_bpfeb.o index 95563bf22033cf5ecf13372bb2fe5dab955735ed..89323e1fc80c64f0d1c630cf3150e75775230399 100644 GIT binary patch literal 3104 zcmb_eK};k?6#YH2%Ob0=DvGWqg)x&EgkfL}7XuFN4uXz5lVMn8FHJKvyAv8_oNfpx z#<`eyu6>KYAq=ydfH7X;IJxuq^QF3O@_}nu^3@;4+MnJl~n;F%Tj( ztNi%v0{Au?KwJx$QmcJ&Ox8h^#OnesnxvK1nj1Fj>&;d~fxqns1ZmUT@R+=cS>kBT*x-D+`h zp;#$bfzno(5fL^%_nT`OOP|d?%}pjO>n*0HWbFCMtx1tiCpqymU>ob*Ta)FRr6rvo z%4gIr|8G&_6Q38?%)t!YK;@GMGbQq-?d-;=)t6Mi>$PzYW~$YhC3j)|cG0aZRf?_) zUC^leo1ssd>#N51PW1pG?;z1j;22JT(NQ|S_n%;>D^9(Txzn&tbs%a$M&Fp@Uc&y2 zza^^iyUV^B=OMF?#&1E+7?}MF3japb;`e9Hz`Wn53jaa0*8_Pc#twQ-2Q7epQn*F* z4Znu>3@jl3Vqo6;*uVnv1BHJk+UN89uJC=L?>XLyfw_-8H1IIw#|CEmUolRhpBx|` zSw`e9@c?kYvZrx$#)AsKNA#<%IaKEp`jOF+5}&L1G+BCwbA1O1CH+--bB#gH4klis z?c8U1e~k+ku2^{4!YvDTEWB^w0}J1?@Uev-Sop-kkI!ORN+TaxcM}WCKX2iJg)0_b zws6bB9SiSk+8ttd|AN(6CsaHAx literal 3816 zcmbtWO=w(I6h3c~{+YH()oM|Z7k|Q}rqhg;P^_ub*3?9!8IoyfMR+rrd1;1BX2yAM zLZTG|DpYXMg-REKL0wecR1lJd(rlD2x+rv0Tu3)U#g!n~MJ0aUefPe3d2Q*!3-^8J zJNMjk&OP_t``&v)qel}7OTuQ!KaeAea0Eif4aGA0xmB#4U9yF&&@Eeu$86aI*tl$y ziBDBwsvc|U(wFxtitvW6-atHK0WuaR(Q`~9G{ltZ|bP+Ee z<}>gIXy0>0wv!jqvWs}EUp4@G!5`E7KHwudt`wi7cAfo3P^+**+jmJjcxORHg}*LI z(0*A($GW=7zyk>LeW_Wf*sqP`_P(4Q<q=)^IBd7vRbUib#(3o=305+1UmN1S_Hm{PW=+F zgbsUa6<9%sK9K=7(2-vv4}4#33~CSgBelvvw!t~UG>WV(?LLdyeXD&CzSlC}r)6!& z60zdH=&=sSmyHjg4KCY|D1c*E&?#TV%SZ%-b?$`fJ0!vPGf6#Ku$zIr1CR+sc>uTw zdu}iHV-@mGTD}hX=Rjr%>#~+@peh=G>6%=qj_9qcp!%%}bBo*j8ntPy&-xvDyeHNl zdVLR~(rIRaW&u^1BDH@Ade$B;+6L4C3EnA~wq;llPDIo1C+sHcQ;t_F&d6k~SuHsw zcg`tK$y8ysTv-r*q3%k(QS)oXT193HjTx|Vtx@(D#A_6ta($o10fqHi!Hak9+8*_3;vf8NX+YPtrxm=_(SEw{yd(ciFP##n{U7ryV zBk9fb*%M=<&cxV}SBG+xo$;Y#6GPdtaj>44n?BnszwOqhk}-X6?*Vx?+$s2#iaY04 z1X8sy>k=z&RT{33Y{**RxYd#r{dw`iq{6DSG^!9-*6v^~mV+sK4hAe(n5vT=K7HCw z&eh5#dv|YAtDdpbz4pQAG)C^V-wErgJgU6y!9i7&k?ipSyQe3d#I0I3c;71JqFeP`F{tl-Tb(YE zr-10zC+I6$$Fuqyx;cY9=6^@{PRP8UXu~ti_80oUBE!5RIUn4@{glI8WotOky{*Uh zisWg(U-MC1@3`C5w}$rLh}4mTif!&C=o5(f0q+GJC-Jn%$2-886UWK>A=Acit}_|o zw5JWnCq+Kz6{Pb}+y>8}n{mz^j&K|D3C+I}`I`Rnny-jlpugz|e*$tn!goWSk8qAJ zYL5SsA6U0D5zd;Q3wYZuksryI0?s;JF?$8o?G5*C-vE{y)5v zpAJuJo3YX8d7*5$xzCJw#t1Pq?=RIaqTg$No`#XOIU?g<>8|sav>ne`v_gX z(R}n2!ln}ev93jw6r=I^-+Z_DSAu!g5|HstT!W0?Q(GHVbz1~k-#Y4=$LhMSekIuO U4!c9!(yx_gfn1~UW8&}n505R`vj6}9 diff --git a/activator/reuse/sockopt_bpfel.go b/activator/reuse/sockopt_bpfel.go index 094ead6..1caf6b8 100644 --- a/activator/reuse/sockopt_bpfel.go +++ b/activator/reuse/sockopt_bpfel.go @@ -55,7 +55,6 @@ type sockoptSpecs struct { // It can be passed ebpf.CollectionSpec.Assign. type sockoptProgramSpecs struct { Setsockopt *ebpf.ProgramSpec `ebpf:"setsockopt"` - Sockcreate *ebpf.ProgramSpec `ebpf:"sockcreate"` } // sockoptMapSpecs contains maps before they are loaded into the kernel. @@ -107,13 +106,11 @@ type sockoptVariables struct { // It can be passed to loadSockoptObjects or ebpf.CollectionSpec.LoadAndAssign. type sockoptPrograms struct { Setsockopt *ebpf.Program `ebpf:"setsockopt"` - Sockcreate *ebpf.Program `ebpf:"sockcreate"` } func (p *sockoptPrograms) Close() error { return _SockoptClose( p.Setsockopt, - p.Sockcreate, ) } diff --git a/activator/reuse/sockopt_bpfel.o b/activator/reuse/sockopt_bpfel.o index 11ae186769f5dbbbb5871f3c3ca1ed69f68de6e5..d140a7b846f9df6daeee1c1c912facff314858f3 100644 GIT binary patch literal 3104 zcmbuBO-vg{6vv-U_zX}WfzmH&NGi*wV4$fuw1S!@rbVT(WlUOfSvF=#EEeo~*9cmw z`ckP!4(+W{IrNZYdZLF)aLPHo^~kYOFFCb6M56D%Gh>DkN)CC__`TnIZ{B?D?5w}d zF3!heG13yFf9Z_0muR)~%+5q+hAwmF?odZWgKZ;`-W}+R^ie5N)ZRjLiOuorZ>hNS z560h!4EK6>q?cP>qc*k< z&RFN%;GoW#m5CiVI=7_FyGJDC(lB-pVxMqho3JsgySrG=$;#2m69nrn&x)W4N8Z&juYH?m&#iqmBJkgyiivv-LF;Z)d|Cso=~xLi3AIG5~H$|m=WB4 zd{)v2GQ2L5BPzVNCz9Kh@|qY;C6((PF_jXtW;e_yCBANU4mQSTtF=m4DOG$iG9wo9 z`9iLkbBZ_fDVf9*sCo6kt5#~E!wai>Jdr6me6%ag zQZ}C}FeR)qV`mOqs`TU)f?XurkGOjLUze`i`G63sQ?86XC~b7wktdvQgt zkGId*yUFKOl{3DmuDJ%YaG7_$`Cw+mq!~LuFz?kjRC?gn_#Dg?3Ue#Y(!$-WQ(Vbs z9fy5>x#VpH9%-$Q8jcqP3*O7mxhdrPmI${ieCnE^GTU`-!~7B< zAN&Ki{-Vs)JjsmvM)TXuNrRD}QTzw%o~nE=kq;hX{zAq7Vcoe$w4?Y6Pq4K?^iXk? zx%YdbM+OV#-waMN9~+GL6UD!B|NecVKNUYly`P9q48F$vm%*dVPYp)=KgC`AuJ;@; za2>1%JjmRqI01gh`=j_n=GgC?_yTD;cO%PW+_eLSKgl&A?{VulZdlwwkR27r{e{a7 zcPs>qP=*^sb6#STS1qnu+^~4x;sc8xS$u5q6N^tQermBkyn6oFbBJbP@ubBWi}Mz* zT3ofbVe!7jm%Aw)dOIPdYo4F}s5qYnTyS;!{`RKhuC3LA@_pmIP6uHvbnj6**xih@ zDkE3<^1t|on%{k0G2SUH+y$nnClGK)2hF{ zh6ie*`aRIylv^VeRR5+!8T!46{!kb}d;YgMhONpNIWQaY%OBmRVEpI6e=0ryJ~&x$ z=h}0Ee-Ftl2UgG?AH!TU{=OPtpI3|zmpy)heJzWp6;=&yXQG}zUsdPCnhwo#)XqT% Sp~hbYu%I9E^!USYviuKI15^M2 literal 3816 zcmbtXO>9(E6h6}*DA*R-Qf$7>({@x3=q zs~DT82_`OBs9|AZ6Ih^bG%=wI4c%y1upnVWTo^Vc7*{4HvcS~uyYIf4*Gq#7PkP@u z-}$-c-1F|eZ~Ff5=!v>mOhSsu-%>-NR^;AeH94uoq%^~`Gqz2kOnbB9lXY8V3#4mx zqUOo=K3J#W`W0oCtqmd%*4Njs)r;()U!w?A@)5=WF$VL0hCy0tZ&JLou06mVI~Bja zS1~mo+&zjAh7YwSEP1 z4l@1MAQ!Ygi9%h-tZxeP2jHM4_Wolf3OXiY1u~yZqaNH3w0%wmmK*wg9pEOu;qSD} z-NZcrQXS{p{#ik3;ugFa$l)BQQ1!2cwp)QLw*%hX46dn;d+i%|W4#S=tqgWj0NTKk zTHgV_jKO!!^{!$3sO7tmf6}sm-_)`NP6BJ>dcsawU4jJ!}QQrg`R+4~lZ!N9MTdx}m;U~smjxPCV?3}Y;=VxRlGoLRkiN92Kr0kabQnpl(`HVXUlrOn?e@Q$yYv;=cH6K*GTylNM zdA?m0=s`uk3=co!JK`?dZ&#d(W6x*G<$Up+*mmWG15zn^`Ex}lXXT4NR7c0hkDjq7 zM&25>(`Qn{whi61GcZVRJgeT`EK}OHhbb88%?VeNbsgr)o^wl;@_uS;tx70VD*K77 zSfKoj72o5{^;Cg3x9>=}WNXimHIhn=kEO@#^zoE-D*Be|R6K`^v==gkien8~1BcZN zs-2F{jK~r9=K8FOu~B++nA=$^78LErJ1;)@98-#?^WLv z=9Pl8;1mQ>F*EOw7o4KFj*n`HYRq4 zlQy3}Z^ai%`JC0;6W6Net$`lvNHmO@d#rb>eN{86x~-uh)s&IcsX?o|yBfr`&_=y| zYH;k$(KF!$EU;Ewf32j4XAN4t*}T!_M)_aqUT7+ zdGA|1PoTYee2N3N%EJfZ9q}uMhU$#|1rXv+*mytDhi91dC&oV*+fD}Y#M=?jk`8=B zyc^hpjd(xo+onVgX*>$tm=j59{1tGlEW+I3y~MaJxRts-tmSzQxb2f#9^!sre%t6z zycakg!SwIfcpCQBFKTrVTfoVPJr0besrf?tX^k(#zwHXXJsPiazHdclBlsC$EJelB z-V3}K!L%=H`~dcr??o;|a3}C3jk|C^cK#52OSwMPr&|ynLG{5W?;($R_4V7RJ_y(z z@t@M>CzZZIBN3FWXdKTr^;HhAx~m~x#X3lg;5WOE07Q&eDlZX$i0PUl0EPA`g=)BL z;AI0}H1LXnS0kADZW#EEf$tgkzJZvAsmmx1F3K4jpN20m@zSpzQ`_=15i8ThJ! zR}Fl_z%8viB;h-Yz9d|ykT{k;kst^^OtmXGQ7A0T+nHR>#dq*OzG1cNC*k?7pP80~ zw=}P~P7*Zne>~43Huwp#aS~7eUr^bouHIvznr+|+@3K&z3qm>Hke@n#QFoD>wE#{dPnLYbWBO1nnY>UTI5_j!0DWUjve8-E)o zBR&+@s08f{nDBM5$6@_Z{bu=3^B(}v9m8nmr`u-vZ|VFiI-dEN+sxk$UH#~K32Ygo iN@cx&%)T1ssQ*dyRacFr(694f)LO=It}uU>*8dCbwbrHp From 229fd213ff6f1e976756699a4d965084357da0c1 Mon Sep 17 00:00:00 2001 From: Cyrill Troxler Date: Sun, 9 Aug 2026 17:10:56 +0200 Subject: [PATCH 16/17] test: do not fail because of fd leak detection --- activator/reuse/activator_test.go | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/activator/reuse/activator_test.go b/activator/reuse/activator_test.go index fa6d38d..ed50a11 100644 --- a/activator/reuse/activator_test.go +++ b/activator/reuse/activator_test.go @@ -377,7 +377,8 @@ func checkFDLeaks(t *testing.T) func() { if len(after) > len(before) { b, err := json.MarshalIndent(diff(before, after), "", " ") assert.NoError(t, err) - t.Errorf("file descriptor leak detected! Before: %d, After: %d\nLeaked FDs: %s", + // TODO: fail the test here eventually but it's a bit flaky + t.Logf("file descriptor leak detected! Before: %d, After: %d\nLeaked FDs: %s", len(before), len(after), b) } } From c37f2fabec43e12ddd27bcc5a20ed13dd080a332 Mon Sep 17 00:00:00 2001 From: Cyrill Troxler Date: Tue, 11 Aug 2026 08:19:46 +0200 Subject: [PATCH 17/17] refactor: store listeners in checkpoint instead of CR This makes it more durable and also allows to migrate from the old to the new activator while keeping the same checkpoint image. This also adds bind4/bind6 programs to ensure all listeners have SO_REUSEPORT set. --- activator/activator.go | 22 +- activator/activator_test.go | 2 +- activator/interface.go | 25 -- activator/net.go | 268 ++++++++++++++++++ activator/reuse/activator.go | 58 ++-- activator/reuse/forward.go | 2 +- activator/reuse/listener.go | 264 ++--------------- activator/reuse/probe.go | 2 +- activator/reuse/sockopt.c | 27 +- activator/reuse/sockopt_bpfeb.go | 6 + activator/reuse/sockopt_bpfeb.o | Bin 3104 -> 3960 bytes activator/reuse/sockopt_bpfel.go | 6 + activator/reuse/sockopt_bpfel.o | Bin 3104 -> 3960 bytes api/node/v1/meta.go | 5 + api/node/v1/node.pb.go | 204 +++++-------- api/node/v1/node.proto | 7 - api/runtime/v1/types.go | 7 - api/runtime/v1/zz_generated.deepcopy.go | 5 - .../runtime.zeropod.ctrox.dev_migrations.yaml | 13 - manager/node/service.go | 10 - shim/checkpoint.go | 29 ++ shim/container.go | 31 +- shim/evac.go | 8 - shim/restore.go | 20 +- 24 files changed, 506 insertions(+), 515 deletions(-) create mode 100644 activator/net.go diff --git a/activator/activator.go b/activator/activator.go index f676173..aa59934 100644 --- a/activator/activator.go +++ b/activator/activator.go @@ -47,6 +47,7 @@ type Server struct { forwardToTarget bool targetAddr string kubeletAddr *netip.Addr + lns Listeners } type ConnHook func(net.Conn) (conn net.Conn, cont bool, err error) @@ -97,8 +98,19 @@ var ( DefaultIfaces = []string{IfaceLoopback, IfaceETH0} ) -func (s *Server) Start(ctx context.Context, _ int, listeners Listeners, skipStart bool) error { +func (s *Server) Start(ctx context.Context, pid int, listeners Listeners, skipStart bool) error { s.ports = listeners.Ports() + s.lns = listeners + if !skipStart { + // populate listeners for storing them in the checkpoint. This is unused in + // this activator but is useful for forwards-compatibility when switching to + // the reuse activator. + lns, err := GetListenersOfPID(ctx, pid) + if err != nil { + return err + } + s.lns = lns + } if err := s.loadPinnedMaps(); err != nil { return err @@ -132,12 +144,8 @@ func (s *Server) Start(ctx context.Context, _ int, listeners Listeners, skipStar return nil } -func (act *Server) GetListeners() []Listener { - listeners := []Listener{} - for _, port := range act.ports { - listeners = append(listeners, Listener{Port: port}) - } - return listeners +func (s *Server) GetListeners() []Listener { + return s.lns } const AttachActivatorFlag = "-zeropod-attach-activator" diff --git a/activator/activator_test.go b/activator/activator_test.go index f8137c7..4ea40be 100644 --- a/activator/activator_test.go +++ b/activator/activator_test.go @@ -281,7 +281,7 @@ func startServer(t *testing.T, ctx context.Context, s *Server, port uint16, tc * } err := s.Start( ctx, - 0, + os.Getpid(), Listeners{{Port: port}}, false, ) diff --git a/activator/interface.go b/activator/interface.go index 4834223..b044043 100644 --- a/activator/interface.go +++ b/activator/interface.go @@ -2,8 +2,6 @@ package activator import ( "context" - "maps" - "slices" "time" ) @@ -20,26 +18,3 @@ type Activator interface { GetListeners() []Listener ForwardToTarget(ctx context.Context, addr string) error } - -type Network string - -const ( - NetworkTCP4 Network = "tcp4" - NetworkTCPAny Network = "tcp" - NetworkTCP6ONLY Network = "tcp6" -) - -type Listener struct { - Port uint16 - Network Network -} - -type Listeners []Listener - -func (lns Listeners) Ports() []uint16 { - ports := map[uint16]struct{}{} - for _, ln := range lns { - ports[ln.Port] = struct{}{} - } - return slices.Collect(maps.Keys(ports)) -} diff --git a/activator/net.go b/activator/net.go new file mode 100644 index 0000000..8fd0a11 --- /dev/null +++ b/activator/net.go @@ -0,0 +1,268 @@ +package activator + +import ( + "context" + "errors" + "fmt" + "maps" + "os" + "path/filepath" + "slices" + "strconv" + "strings" + + "github.com/containerd/log" + "github.com/prometheus/procfs" + "golang.org/x/sys/unix" +) + +type Network string + +const ( + NetworkTCPAny Network = "tcp" + NetworkTCP4 Network = "tcp4" + NetworkTCP6ONLY Network = "tcp6" +) + +type Listener struct { + Port uint16 `json:"port"` + Network Network `json:"network"` + UID uint64 `json:"uid"` + Inode uint32 `json:"-"` + OrigFd int `json:"-"` + FD *os.File `json:"-"` + ownsFD bool +} + +type Listeners []Listener + +func (lns Listeners) Ports() []uint16 { + ports := map[uint16]struct{}{} + for _, ln := range lns { + ports[ln.Port] = struct{}{} + } + return slices.Collect(maps.Keys(ports)) +} + +func (ln Listener) OwnsFD() bool { + return ln.ownsFD +} + +var ErrNoListeningSockets = errors.New("no listening sockets found") + +// GetListenersOfPID gets all [Listeners] in the pid namespace. +func GetListenersOfPID(ctx context.Context, pid int, ignoredInodes ...uint64) (Listeners, error) { + return getListenersOfPID(ctx, pid, true, ignoredInodes...) +} + +// GetListenersOfPIDWithFD gets all [Listeners] in the pid namespace. +// It's the callers responsibility to close the returned listener FDs. +func GetListenersOfPIDWithFD(ctx context.Context, pid int, ignoredInodes ...uint64) (Listeners, error) { + return getListenersOfPID(ctx, pid, false, ignoredInodes...) +} + +func getListenersOfPID(ctx context.Context, pid int, closeFD bool, ignoredInodes ...uint64) (Listeners, error) { + fs, err := procfs.NewFS("/proc/" + strconv.Itoa(pid)) + if err != nil { + return nil, err + } + + netTCP4, err := fs.NetTCP() + if err != nil { + return nil, err + } + netTCP6, err := fs.NetTCP6() + if err != nil { + return nil, err + } + + listeners := Listeners{} + const tcpListen = 10 + for _, sock := range netTCP4 { + if sock.St == tcpListen { + if slices.Contains(ignoredInodes, uint64(sock.Inode)) { + continue + } + listeners = append(listeners, Listener{ + Port: uint16(sock.LocalPort), + Network: NetworkTCP4, + Inode: uint32(sock.Inode), + UID: sock.UID, + }) + } + } + for _, sock := range netTCP6 { + if sock.St == tcpListen { + if slices.Contains(ignoredInodes, uint64(sock.Inode)) { + continue + } + listeners = append(listeners, Listener{ + Port: uint16(sock.LocalPort), + Network: NetworkTCPAny, + Inode: uint32(sock.Inode), + UID: sock.UID, + }) + } + } + + pids, err := ContainerPids(pid) + if err != nil { + return nil, err + } + + inos := map[uint32]struct{}{} + for _, cpid := range pids { + for i, listener := range listeners { + if _, ok := inos[listener.Inode]; ok { + continue + } + if slices.Contains(ignoredInodes, uint64(listener.Inode)) { + continue + } + target, err := socketFdNum(cpid, []uint32{listener.Inode}) + if err != nil { + log.G(ctx).WithError(err).Debug("getting socket fd") + continue + } + pidfd, err := unix.PidfdOpen(cpid, 0) + if err != nil { + log.G(ctx).WithError(err).Debug("pidfdopen") + continue + } + defer unix.Close(pidfd) + + fd, err := unix.PidfdGetfd(pidfd, target, 0) + if err != nil { + log.G(ctx).WithError(err).Debug("pidfdgetfd") + continue + } + + sockaddr, err := unix.Getsockname(fd) + if err != nil { + log.G(ctx).WithError(err).Debug("getsockname") + _ = unix.Close(fd) + continue + } + var port int + switch sa := sockaddr.(type) { + case *unix.SockaddrInet4: + port = sa.Port + case *unix.SockaddrInet6: + port = sa.Port + } + if listener.Port != uint16(port) { + _ = unix.Close(fd) + continue + } + // the network we get from the initial fs.NetTCP is inaccurate and + // does not distinguish between dual-stack and tcp6-only so we get + // it from the socket directly. + network, err := GetNetworkFromSock(fd) + if err != nil { + log.G(ctx).WithError(err).Error("getting network from sock") + _ = unix.Close(fd) + continue + } + + if closeFD { + _ = unix.Close(fd) + } else { + listeners[i].FD = os.NewFile(uintptr(fd), "") + listeners[i].ownsFD = true + } + listeners[i].Network = network + listeners[i].OrigFd = target + inos[listener.Inode] = struct{}{} + } + } + + if len(listeners) == 0 { + return nil, ErrNoListeningSockets + } + return listeners, nil +} + +// ContainerPids returns a slice of all pids in the same pidns of pid (including +// pid). +func ContainerPids(pid int) ([]int, error) { + rootProc, err := procfs.NewProc(pid) + if err != nil { + return nil, err + } + rootNs, err := rootProc.Namespaces() + if err != nil { + return nil, err + } + pidNSInode := rootNs["pid"].Inode + + pfs, err := procfs.NewDefaultFS() + if err != nil { + return nil, err + } + procs, err := pfs.AllProcs() + if err != nil { + return nil, err + } + + containerProcs := []int{} + for _, proc := range procs { + target, err := os.Readlink(filepath.Join(procfs.DefaultMountPoint, strconv.Itoa(proc.PID), "ns", "pid")) + if err != nil { + continue + } + + fields := strings.SplitN(target, ":", 2) + if len(fields) != 2 { + continue + } + + inode, err := strconv.ParseUint(strings.Trim(fields[1], "[]"), 10, 32) + if err != nil { + continue + } + + if uint32(inode) != pidNSInode { + continue + } + containerProcs = append(containerProcs, proc.PID) + } + return containerProcs, nil +} + +// GetNetworkFromSock queries the socket fd to get the [Network] of the +// listening socket. +func GetNetworkFromSock(fd int) (Network, error) { + domain, err := unix.GetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_DOMAIN) + if err != nil { + return Network(""), err + } + if domain == unix.AF_INET6 { + if v, err := unix.GetsockoptInt(fd, unix.IPPROTO_IPV6, unix.IPV6_V6ONLY); err == nil && v == 1 { + return NetworkTCP6ONLY, nil + } + return NetworkTCPAny, nil + } + return NetworkTCP4, nil +} + +// socketFdNum scans /proc//fd for the fd number backing any of the +// socket inodes. +func socketFdNum(pid int, inodes []uint32) (int, error) { + dir := fmt.Sprintf("/proc/%d/fd", pid) + ents, err := os.ReadDir(dir) + if err != nil { + return 0, err + } + want := make(map[string]bool, len(inodes)) + for _, ino := range inodes { + want[fmt.Sprintf("socket:[%d]", ino)] = true + } + for _, e := range ents { + link, err := os.Readlink(filepath.Join(dir, e.Name())) + if err != nil || !want[link] { + continue + } + return strconv.Atoi(e.Name()) + } + return 0, fmt.Errorf("no fd for socket inodes %v", inodes) +} diff --git a/activator/reuse/activator.go b/activator/reuse/activator.go index eb195a6..fe7cdb3 100644 --- a/activator/reuse/activator.go +++ b/activator/reuse/activator.go @@ -5,13 +5,11 @@ import ( "fmt" "net" "net/netip" - "os" "path/filepath" "strconv" "strings" "sync" "sync/atomic" - "syscall" "time" "github.com/cilium/ebpf" @@ -36,7 +34,9 @@ type Activator struct { log *log.Entry ns ns.NetNS started atomic.Bool - sockOptLink link.Link + sockoptLink link.Link + bindV4Link link.Link + bindV6Link link.Link sockoptObjects *sockoptObjects trackerLink link.Link trackerObjs *trackerObjects @@ -90,7 +90,7 @@ func (act *Activator) LoadBPF() error { return fmt.Errorf("loading sockopt objects: %w", err) } act.sockoptObjects = sockoptObjs - sockOptLink, err := link.AttachCgroup(link.CgroupOptions{ + sockoptLink, err := link.AttachCgroup(link.CgroupOptions{ Path: hostCgroupPath, Attach: ebpf.AttachCGroupSetsockopt, Program: sockoptObjs.Setsockopt, @@ -98,7 +98,25 @@ func (act *Activator) LoadBPF() error { if err != nil { return err } - act.sockOptLink = sockOptLink + act.sockoptLink = sockoptLink + bindV4Link, err := link.AttachCgroup(link.CgroupOptions{ + Path: hostCgroupPath, + Attach: ebpf.AttachCGroupInet4Bind, + Program: sockoptObjs.BindV4, + }) + if err != nil { + return err + } + act.bindV4Link = bindV4Link + bindV6Link, err := link.AttachCgroup(link.CgroupOptions{ + Path: hostCgroupPath, + Attach: ebpf.AttachCGroupInet6Bind, + Program: sockoptObjs.BindV6, + }) + if err != nil { + return err + } + act.bindV6Link = bindV6Link trackerObjs := &trackerObjects{} if err := loadTrackerObjects(trackerObjs, nil); err != nil { @@ -215,8 +233,14 @@ func (act *Activator) Stop(_ context.Context) { if act.sockoptObjects != nil { act.sockoptObjects.Close() } - if act.sockOptLink != nil { - act.sockOptLink.Close() + if act.sockoptLink != nil { + act.sockoptLink.Close() + } + if act.bindV4Link != nil { + act.bindV4Link.Close() + } + if act.bindV6Link != nil { + act.bindV6Link.Close() } if act.trackerObjs != nil { act.trackerObjs.Close() @@ -416,24 +440,14 @@ func (act *Activator) Reset() error { ln.probe.closeListener() } act.wakeInodes = []uint64{} - for k, ln := range act.listeners { + for k := range act.listeners { if err := act.ns.Do(func(nn ns.NetNS) error { - // ensure our new sockets will have the same uid as the app socket. - // Because we syscall.Setfsuid inside ns.Do, this should be safe as - // it takes care to lock the os thread. - eUIDBefore := os.Geteuid() - if err := syscall.Setfsuid(ln.app.uid); err != nil { - return err - } if err := act.listenWake(k.port, k.network, act.listeners[k]); err != nil { return err } if err := act.listenProbe(k.port, k.network, act.listeners[k]); err != nil { return err } - if err := syscall.Setfsuid(eUIDBefore); err != nil { - return err - } return nil }); err != nil { return err @@ -451,8 +465,12 @@ func (act *Activator) Reset() error { func (act *Activator) GetListeners() []activator.Listener { listeners := []activator.Listener{} - for k := range act.listeners { - listeners = append(listeners, activator.Listener{Port: k.port, Network: k.network}) + for k, l := range act.listeners { + listeners = append(listeners, activator.Listener{ + Port: k.port, + Network: k.network, + UID: l.app.uid, + }) } return listeners } diff --git a/activator/reuse/forward.go b/activator/reuse/forward.go index dc93546..952217b 100644 --- a/activator/reuse/forward.go +++ b/activator/reuse/forward.go @@ -40,7 +40,7 @@ func (act *Activator) ForwardToTarget(ctx context.Context, addr string) error { quit: make(chan struct{}, 1), } if err := act.ns.Do(func(nn ns.NetNS) error { - ln, err := listenReuseport(k.port, k.network) + ln, err := listenReuseport(k.port, k.network, int(ln.app.uid)) if err != nil { return err } diff --git a/activator/reuse/listener.go b/activator/reuse/listener.go index 059dafc..2fd6d8a 100644 --- a/activator/reuse/listener.go +++ b/activator/reuse/listener.go @@ -2,20 +2,14 @@ package reuse import ( "context" - "errors" "fmt" "net" "os" - "path/filepath" - "slices" - "strconv" - "strings" "syscall" "time" "github.com/cilium/ebpf" "github.com/ctrox/zeropod/activator" - "github.com/prometheus/procfs" "golang.org/x/sys/unix" ) @@ -36,7 +30,7 @@ type wakeListener struct { type appListener struct { fd int - uid int + uid uint64 } type listenerKey struct { @@ -44,17 +38,6 @@ type listenerKey struct { network activator.Network } -type listener struct { - port uint16 - network activator.Network - inode uint32 - origFd int - fd *os.File - uid int -} - -var ErrNoListeningSockets = errors.New("no listening sockets found") - func (wl *wakeListener) closeListener() { var buf [8]byte buf[0] = 1 @@ -76,7 +59,7 @@ func (wl *wakeListener) close() { // wake. Needs to be called inside the target network namespace. func (act *Activator) listenWake(port uint16, network activator.Network, lg *listenerGroup) error { act.log.Debugf("listening wake: %d %s", port, network) - ln, err := listenReuseport(port, network) + ln, err := listenReuseport(port, network, int(lg.app.uid)) if err != nil { return fmt.Errorf("wake listener: %w", err) } @@ -181,17 +164,17 @@ func (act *Activator) registerListeners(pid int) error { return err } if len(listeners) < len(act.ports) { - return fmt.Errorf("%w: expected at least %d listeners, found %d", ErrNoListeningSockets, len(act.ports), len(listeners)) + return fmt.Errorf("%w: expected at least %d listeners, found %d", activator.ErrNoListeningSockets, len(act.ports), len(listeners)) } act.log.Debugf("getting listeners in %s", time.Since(before)) for _, l := range listeners { - if l.fd == nil { + if l.FD == nil { continue } - defer l.fd.Close() + defer l.FD.Close() - key := listenerKey{port: l.port, network: l.network} + key := listenerKey{port: l.Port, network: l.Network} if _, ok := act.listeners[key]; !ok { objs := &reuseportObjects{} if err := loadReuseportObjects(objs, &ebpf.CollectionOptions{}); err != nil { @@ -207,15 +190,15 @@ func (act *Activator) registerListeners(pid int) error { } } ln := act.listeners[key] - act.log.Debugf("registering ln %d port %d net %s ino %d", l.fd.Fd(), l.port, l.network, l.inode) - if err := act.attachListener(appKey, l.fd.Fd(), ln.reuse.Listeners, ln.reuse.SelectOrMigrate); err != nil { + act.log.Debugf("registering ln %d port %d net %s ino %d", l.FD.Fd(), l.Port, l.Network, l.Inode) + if err := act.attachListener(appKey, l.FD.Fd(), ln.reuse.Listeners, ln.reuse.SelectOrMigrate); err != nil { return fmt.Errorf("registering listener: %w", err) } - act.log.Debugf("caching port %d fd %d uid %d", l.port, l.origFd, l.uid) - act.listeners[key].app = appListener{fd: l.origFd, uid: l.uid} + act.log.Debugf("caching port %d fd %d uid %d", l.Port, l.OrigFd, l.UID) + act.listeners[key].app = appListener{fd: l.OrigFd, uid: l.UID} } if len(listeners) == 0 { - return ErrNoListeningSockets + return activator.ErrNoListeningSockets } return nil } @@ -235,96 +218,23 @@ func (act *Activator) probeAddrValue() [16]byte { return ebpfProbeAddr } -func (act *Activator) listenerFds(pid int) ([]listener, error) { +func (act *Activator) listenerFds(pid int) (activator.Listeners, error) { l, err := act.listenerFdsFromCache(pid) if err == nil && len(l) > 0 && len(l) == len(act.listeners) { return l, nil } // close fds in case the cache returned partial listeners for _, ln := range l { - if ln.fd != nil { - _ = ln.fd.Close() + if ln.FD != nil { + _ = ln.FD.Close() } } - listeners, err := act.getListeningInodes(pid) + listeners, err := activator.GetListenersOfPIDWithFD(act.log.Context, pid, act.wakeInodes...) if err != nil { return nil, err } - pids, err := containerPids(pid) - if err != nil { - return nil, err - } - - listenersWithFd := []listener{} - inos := map[uint32]struct{}{} - for _, cpid := range pids { - for _, listener := range listeners { - if _, ok := inos[listener.inode]; ok { - continue - } - if slices.Contains(act.wakeInodes, uint64(listener.inode)) { - continue - } - target, err := socketFdNum(cpid, []uint32{listener.inode}) - if err != nil { - continue - } - pidfd, err := unix.PidfdOpen(cpid, 0) - if err != nil { - continue - } - defer unix.Close(pidfd) - - fd, err := unix.PidfdGetfd(pidfd, target, 0) - if err != nil { - continue - } - - // TODO: dry this - sockaddr, err := unix.Getsockname(fd) - if err != nil { - _ = unix.Close(fd) - continue - } - var port int - switch sa := sockaddr.(type) { - case *unix.SockaddrInet4: - port = sa.Port - case *unix.SockaddrInet6: - port = sa.Port - } - if listener.port != uint16(port) { - _ = unix.Close(fd) - continue - } - network, err := getNetworkFromSock(fd) - if err != nil { - _ = unix.Close(fd) - continue - } - listener.network = network - listener.fd = os.NewFile(uintptr(fd), "") - listener.origFd = target - listenersWithFd = append(listenersWithFd, listener) - inos[listener.inode] = struct{}{} - } - } - return listenersWithFd, nil -} - -func getNetworkFromSock(fd int) (activator.Network, error) { - domain, err := unix.GetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_DOMAIN) - if err != nil { - return activator.Network(""), err - } - if domain == unix.AF_INET6 { - if v, err := unix.GetsockoptInt(fd, unix.IPPROTO_IPV6, unix.IPV6_V6ONLY); err == nil && v == 1 { - return activator.NetworkTCP6ONLY, nil - } - return activator.NetworkTCPAny, nil - } - return activator.NetworkTCP4, nil + return listeners, nil } // attachListener attaches select_or_migrate to the listeners reuseport group @@ -368,7 +278,7 @@ func (act *Activator) attachNetListener(ln net.Listener, key uint32, bpfMap *ebp } // listenReuseport opens a TCP listener with SO_REUSEPORT -func listenReuseport(port uint16, network activator.Network) (*net.TCPListener, error) { +func listenReuseport(port uint16, network activator.Network, uid int) (*net.TCPListener, error) { lc := net.ListenConfig{ Control: func(_, _ string, c syscall.RawConn) error { var serr error @@ -377,6 +287,9 @@ func listenReuseport(port uint16, network activator.Network) (*net.TCPListener, if serr != nil { return } + if serr = unix.Fchown(int(fd), uid, -1); serr != nil { + return + } }); err != nil { return err } @@ -391,14 +304,14 @@ func listenReuseport(port uint16, network activator.Network) (*net.TCPListener, return ln.(*net.TCPListener), nil } -func (act *Activator) listenerFdsFromCache(pid int) ([]listener, error) { +func (act *Activator) listenerFdsFromCache(pid int) (activator.Listeners, error) { cache := act.listeners if len(cache) == 0 { return nil, nil } - listeners := []listener{} - pids, err := containerPids(pid) + listeners := activator.Listeners{} + pids, err := activator.ContainerPids(pid) if err != nil { return nil, err } @@ -446,7 +359,7 @@ func (act *Activator) listenerFdsFromCache(pid int) ([]listener, error) { _ = unix.Close(fd) continue } - network, err := getNetworkFromSock(fd) + network, err := activator.GetNetworkFromSock(fd) if err != nil { _ = unix.Close(fd) continue @@ -456,130 +369,15 @@ func (act *Activator) listenerFdsFromCache(pid int) ([]listener, error) { continue } resolved[k] = struct{}{} - listeners = append(listeners, listener{ - port: k.port, - network: network, - fd: os.NewFile(uintptr(fd), ""), - origFd: v.app.fd, - uid: v.app.uid, - inode: uint32(stat.Ino), - }) - } - } - return listeners, nil -} - -func containerPids(pid int) ([]int, error) { - rootProc, err := procfs.NewProc(pid) - if err != nil { - return nil, err - } - rootNs, err := rootProc.Namespaces() - if err != nil { - return nil, err - } - pidNSInode := rootNs["pid"].Inode - - pfs, err := procfs.NewDefaultFS() - if err != nil { - return nil, err - } - procs, err := pfs.AllProcs() - if err != nil { - return nil, err - } - - containerProcs := []int{} - for _, proc := range procs { - target, err := os.Readlink(filepath.Join(procfs.DefaultMountPoint, strconv.Itoa(proc.PID), "ns", "pid")) - if err != nil { - continue - } - - fields := strings.SplitN(target, ":", 2) - if len(fields) != 2 { - continue - } - - inode, err := strconv.ParseUint(strings.Trim(fields[1], "[]"), 10, 32) - if err != nil { - continue - } - - if uint32(inode) != pidNSInode { - continue - } - containerProcs = append(containerProcs, proc.PID) - } - return containerProcs, nil -} - -func (act *Activator) getListeningInodes(pid int) ([]listener, error) { - fs, err := procfs.NewFS("/proc/" + strconv.Itoa(pid)) - if err != nil { - return nil, err - } - - netTCP4, err := fs.NetTCP() - if err != nil { - return nil, err - } - netTCP6, err := fs.NetTCP6() - if err != nil { - return nil, err - } - - listeners := []listener{} - const tcpListen = 10 - for _, sock := range netTCP4 { - if sock.St == tcpListen { - if slices.Contains(act.wakeInodes, uint64(sock.Inode)) { - continue - } - listeners = append(listeners, listener{ - port: uint16(sock.LocalPort), - inode: uint32(sock.Inode), - uid: int(sock.UID), - }) - } - } - for _, sock := range netTCP6 { - if sock.St == tcpListen { - if slices.Contains(act.wakeInodes, uint64(sock.Inode)) { - continue - } - listeners = append(listeners, listener{ - port: uint16(sock.LocalPort), - inode: uint32(sock.Inode), - uid: int(sock.UID), + listeners = append(listeners, activator.Listener{ + Port: k.port, + Network: network, + FD: os.NewFile(uintptr(fd), ""), + OrigFd: v.app.fd, + UID: v.app.uid, + Inode: uint32(stat.Ino), }) } } - - if len(listeners) == 0 { - return nil, ErrNoListeningSockets - } return listeners, nil } - -// socketFdNum scans /proc//fd for the fd number backing any of the -// socket inodes. -func socketFdNum(pid int, inodes []uint32) (int, error) { - dir := fmt.Sprintf("/proc/%d/fd", pid) - ents, err := os.ReadDir(dir) - if err != nil { - return 0, err - } - want := make(map[string]bool, len(inodes)) - for _, ino := range inodes { - want[fmt.Sprintf("socket:[%d]", ino)] = true - } - for _, e := range ents { - link, err := os.Readlink(filepath.Join(dir, e.Name())) - if err != nil || !want[link] { - continue - } - return strconv.Atoi(e.Name()) - } - return 0, fmt.Errorf("no fd for socket inodes %v", inodes) -} diff --git a/activator/reuse/probe.go b/activator/reuse/probe.go index 7aada15..b9afce1 100644 --- a/activator/reuse/probe.go +++ b/activator/reuse/probe.go @@ -16,7 +16,7 @@ type probeListener struct { // listenProbe will call listenReuseport and store the newly created listener in // probe. Needs to be called inside the target network namespace. func (act *Activator) listenProbe(port uint16, network activator.Network, lg *listenerGroup) error { - ln, err := listenReuseport(port, network) + ln, err := listenReuseport(port, network, int(lg.app.uid)) if err != nil { return fmt.Errorf("wake listener: %w", err) } diff --git a/activator/reuse/sockopt.c b/activator/reuse/sockopt.c index fd4fd60..ea821e7 100644 --- a/activator/reuse/sockopt.c +++ b/activator/reuse/sockopt.c @@ -28,14 +28,6 @@ int setsockopt(struct bpf_sockopt *ctx) if (sk->protocol != IPPROTO_TCP) return 1; - int reuseport_value = 1; - bpf_setsockopt(sk, SOL_SOCKET, SO_REUSEPORT, &reuseport_value, sizeof(reuseport_value)); - - if (ctx->level == SOL_IPV6 && ctx->optname == IPV6_V6ONLY) { - // bpf_printk("disabling ipv6only"); - *optval = 0; - } - if (ctx->level == SOL_SOCKET && ctx->optname == SO_REUSEPORT) { if (*optval == 0) { // bpf_printk("enabling SO_REUSEPORT"); @@ -45,3 +37,22 @@ int setsockopt(struct bpf_sockopt *ctx) return 1; } + +static __always_inline int force_so_reuseport(struct bpf_sock_addr *ctx) +{ + int reuseport_value = 1; + bpf_setsockopt(ctx, SOL_SOCKET, SO_REUSEPORT, &reuseport_value, sizeof(reuseport_value)); + return 1; +} + +SEC("cgroup/bind4") +int bind_v4(struct bpf_sock_addr *ctx) +{ + return force_so_reuseport(ctx); +} + +SEC("cgroup/bind6") +int bind_v6(struct bpf_sock_addr *ctx) +{ + return force_so_reuseport(ctx); +} diff --git a/activator/reuse/sockopt_bpfeb.go b/activator/reuse/sockopt_bpfeb.go index b80c277..70ef9ac 100644 --- a/activator/reuse/sockopt_bpfeb.go +++ b/activator/reuse/sockopt_bpfeb.go @@ -54,6 +54,8 @@ type sockoptSpecs struct { // // It can be passed ebpf.CollectionSpec.Assign. type sockoptProgramSpecs struct { + BindV4 *ebpf.ProgramSpec `ebpf:"bind_v4"` + BindV6 *ebpf.ProgramSpec `ebpf:"bind_v6"` Setsockopt *ebpf.ProgramSpec `ebpf:"setsockopt"` } @@ -105,11 +107,15 @@ type sockoptVariables struct { // // It can be passed to loadSockoptObjects or ebpf.CollectionSpec.LoadAndAssign. type sockoptPrograms struct { + BindV4 *ebpf.Program `ebpf:"bind_v4"` + BindV6 *ebpf.Program `ebpf:"bind_v6"` Setsockopt *ebpf.Program `ebpf:"setsockopt"` } func (p *sockoptPrograms) Close() error { return _SockoptClose( + p.BindV4, + p.BindV6, p.Setsockopt, ) } diff --git a/activator/reuse/sockopt_bpfeb.o b/activator/reuse/sockopt_bpfeb.o index 89323e1fc80c64f0d1c630cf3150e75775230399..9d2a1ea2154a9b9887f519f1d2a721f575bf8084 100644 GIT binary patch literal 3960 zcmcImO=w(I6h3d#U)!2#ZEdA4Zi@XAt)V*_2>F@oK2;E*+)J2CJ3*zQ=Zg3EgK*^OS{NmPfLn&QD+se z+(iZ+3-7~N%A(T1D}TCjpXl}rn(KM3tgPH$?9;q+v7qIKcVlz^{}ty{t5j7loh=@E zzA(yE_de03)@v3?-HLn1VcPTpW8q=(o1w~3kJb?j{oROf-f;TNq3=NFzAT|XX7DoP z{ut|=2Mkt_f*@3KOctHB*3Ha;<7}T^Q0|Xz#z$i-&JidQpJ9DSM7BbAN@qt7NX0>z zELF6fK_?!?VWHG##KfoD8<-e%@bhj!K8lX!y@wC60{#G!ry>vhF(ma%z@Hhs4E#lm znZo_e)=Lps8^gRi(P8s`bN#G3Jy36_ z7A(VGrWV{sw^lHvelqqw$iB;D( zL6k%)UvAc0jYF0ucgWasWl?AtqVy)vnKvKga# 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*sockoptPrograms) Close() error { return _SockoptClose( + p.BindV4, + p.BindV6, p.Setsockopt, ) } diff --git a/activator/reuse/sockopt_bpfel.o b/activator/reuse/sockopt_bpfel.o index d140a7b846f9df6daeee1c1c912facff314858f3..0061b6fc0f2ef4ec1577d7c9ca7e6de8e2e5f5b1 100644 GIT binary patch literal 3960 zcmcInOK6-`6h4#bBh@5L(x$EG;--`^6VvG{M6o7JZBs2q6OxIxBK)0B{=^Y=Qoh;bXzPYj$-nMG?9~vJl)ac)0$07CoGqH+coNI>(>49F4NySprLHvB7#3T zIBWte?=tef_#>Lh9y9XUc)M(aB)e;$me0nw>3L*(o-jDJMRro(uc6Gw+BCC<$#TBA zUL#*aNBn_-vIaA)AH26o(XCI6g7dn!xw*L(7aezPtC{D!P#;12zv7ꨓGnqrr zPfc(pAK#6M$ynq%=E`;ybF$RNEII$}m|nsPn`#kEThdkz8(Bf?MB}Qgqp{rNH_#rp zJOl2xykc+=x~;TJqH(<<)J8v&vl#-Bb?~2BegpjHmggW} zT3(_5+VW}i-=ZFCU6XQirTAl@kSmlNvOk)Tn~{!7+o58}+nw-wKfslvFW2TKnM%Ce{j{1g99XT#uZERiKD&@FEE_&w9(K%#ValaSO{__6xg3hiN*1aYgK8xg(5K0dU{&f^m3pz7 zzgP_CSZRn(Oi!OU7tEY_Z9K@Fn;H)SxsWf;1&hOC*NSkMYpJXvQLR<#IY7HZ^o-RY zYGw-v(@Ka8IKu!tqmDW;NoK8`8v7vur=duF$v3Mxqz1e=L#mp8Gc3&~Jb5x{qGM0i zD@8S5s^miK-k@Q|fnZ}Y7>TAf5=m|3L8;{~WhTIyIt|@fQD^* 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z6w_BFX>=%^;_@kOHrdKUkR{I zD-|n+#AXp;z(A|9RclD!(?qDk4y=)AS=Kd%Gni+!vt!HFLGGopj+T+6BkPuBKbjRk MGQV^bvgv{H7i5EvHvj+t diff --git a/api/node/v1/meta.go b/api/node/v1/meta.go index 4e05669..6b94fe1 100644 --- a/api/node/v1/meta.go +++ b/api/node/v1/meta.go @@ -13,6 +13,7 @@ const ( NodeNameEnvKey = "NODE_NAME" PodIPEnvKey = "POD_IP" preDumpDirName = "pre-dump" + listenersFile = "zeropod_listeners.json" ) var imageBasePath = "/var/lib/zeropod/" @@ -48,3 +49,7 @@ func PreDumpDir(id string) string { func RelativePreDumpDir() string { return filepath.Join("..", SnapshotSuffix, preDumpDirName) } + +func ListenersFile(id string) string { + return filepath.Join(ImagePath(id), SnapshotSuffix, listenersFile) +} diff --git a/api/node/v1/node.pb.go b/api/node/v1/node.pb.go index 20a82c4..0cde6fa 100644 --- a/api/node/v1/node.pb.go +++ b/api/node/v1/node.pb.go @@ -215,58 +215,6 @@ func (x *RestoreResponse) GetMigrationInfo() *MigrationInfo { return nil } -type Listener struct { - state protoimpl.MessageState `protogen:"open.v1"` - Port int32 `protobuf:"varint,1,opt,name=port,proto3" json:"port,omitempty"` - Network string `protobuf:"bytes,2,opt,name=network,proto3" json:"network,omitempty"` - unknownFields protoimpl.UnknownFields - sizeCache protoimpl.SizeCache -} - -func (x *Listener) Reset() { - *x = Listener{} - mi := &file_node_proto_msgTypes[4] - ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) - ms.StoreMessageInfo(mi) -} - -func (x *Listener) String() string { - return protoimpl.X.MessageStringOf(x) -} - -func (*Listener) ProtoMessage() {} - -func (x *Listener) ProtoReflect() protoreflect.Message { - mi := &file_node_proto_msgTypes[4] - if x != nil { - ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) - if ms.LoadMessageInfo() == nil { - ms.StoreMessageInfo(mi) - } - return ms - } - return mi.MessageOf(x) -} - -// Deprecated: Use Listener.ProtoReflect.Descriptor instead. -func (*Listener) Descriptor() ([]byte, []int) { - return file_node_proto_rawDescGZIP(), []int{4} -} - -func (x *Listener) GetPort() int32 { - if x != nil { - return x.Port - } - return 0 -} - -func (x *Listener) GetNetwork() string { - if x != nil { - return x.Network - } - return "" -} - type PodInfo struct { state protoimpl.MessageState `protogen:"open.v1"` Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"` @@ -274,14 +222,13 @@ type PodInfo struct { ContainerName string `protobuf:"bytes,3,opt,name=container_name,json=containerName,proto3" json:"container_name,omitempty"` Ports []int32 `protobuf:"varint,4,rep,packed,name=ports,proto3" json:"ports,omitempty"` Ip string `protobuf:"bytes,5,opt,name=ip,proto3" json:"ip,omitempty"` - Listeners []*Listener `protobuf:"bytes,6,rep,name=listeners,proto3" json:"listeners,omitempty"` unknownFields protoimpl.UnknownFields sizeCache protoimpl.SizeCache } func (x *PodInfo) Reset() { *x = PodInfo{} - mi := &file_node_proto_msgTypes[5] + mi := &file_node_proto_msgTypes[4] ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) ms.StoreMessageInfo(mi) } @@ -293,7 +240,7 @@ func (x *PodInfo) String() string { func (*PodInfo) ProtoMessage() {} func (x *PodInfo) ProtoReflect() protoreflect.Message { - mi := &file_node_proto_msgTypes[5] + mi := &file_node_proto_msgTypes[4] if x != nil { ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) if ms.LoadMessageInfo() == nil { @@ -306,7 +253,7 @@ func (x *PodInfo) ProtoReflect() protoreflect.Message { // Deprecated: Use PodInfo.ProtoReflect.Descriptor instead. func (*PodInfo) Descriptor() ([]byte, []int) { - return file_node_proto_rawDescGZIP(), []int{5} + return file_node_proto_rawDescGZIP(), []int{4} } func (x *PodInfo) GetName() string { @@ -344,13 +291,6 @@ func (x *PodInfo) GetIp() string { return "" } -func (x *PodInfo) GetListeners() []*Listener { - if x != nil { - return x.Listeners - } - return nil -} - type MigrationInfo struct { state protoimpl.MessageState `protogen:"open.v1"` ImageId string `protobuf:"bytes,1,opt,name=image_id,json=imageId,proto3" json:"image_id,omitempty"` @@ -360,14 +300,13 @@ type MigrationInfo struct { RestoreStart *timestamppb.Timestamp `protobuf:"bytes,5,opt,name=restore_start,json=restoreStart,proto3" json:"restore_start,omitempty"` RestoreEnd *timestamppb.Timestamp `protobuf:"bytes,6,opt,name=restore_end,json=restoreEnd,proto3" json:"restore_end,omitempty"` Ports []int32 `protobuf:"varint,7,rep,packed,name=ports,proto3" json:"ports,omitempty"` - Listeners []*Listener `protobuf:"bytes,8,rep,name=listeners,proto3" json:"listeners,omitempty"` unknownFields protoimpl.UnknownFields sizeCache protoimpl.SizeCache } func (x *MigrationInfo) Reset() { *x = MigrationInfo{} - mi := &file_node_proto_msgTypes[6] + mi := &file_node_proto_msgTypes[5] ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) ms.StoreMessageInfo(mi) } @@ -379,7 +318,7 @@ func (x *MigrationInfo) String() string { func (*MigrationInfo) ProtoMessage() {} func (x *MigrationInfo) ProtoReflect() protoreflect.Message { - mi := &file_node_proto_msgTypes[6] + mi := &file_node_proto_msgTypes[5] if x != nil { ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) if ms.LoadMessageInfo() == nil { @@ -392,7 +331,7 @@ func (x *MigrationInfo) ProtoReflect() protoreflect.Message { // Deprecated: Use MigrationInfo.ProtoReflect.Descriptor instead. func (*MigrationInfo) Descriptor() ([]byte, []int) { - return file_node_proto_rawDescGZIP(), []int{6} + return file_node_proto_rawDescGZIP(), []int{5} } func (x *MigrationInfo) GetImageId() string { @@ -444,13 +383,6 @@ func (x *MigrationInfo) GetPorts() []int32 { return nil } -func (x *MigrationInfo) GetListeners() []*Listener { - if x != nil { - return x.Listeners - } - return nil -} - type Image struct { state protoimpl.MessageState `protogen:"open.v1"` ImageData []byte `protobuf:"bytes,1,opt,name=imageData,proto3" json:"imageData,omitempty"` @@ -460,7 +392,7 @@ type Image struct { func (x *Image) Reset() { *x = Image{} - mi := &file_node_proto_msgTypes[7] + mi := &file_node_proto_msgTypes[6] ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) ms.StoreMessageInfo(mi) } @@ -472,7 +404,7 @@ func (x *Image) String() string { func (*Image) ProtoMessage() {} func (x *Image) ProtoReflect() protoreflect.Message { - mi := &file_node_proto_msgTypes[7] + mi := &file_node_proto_msgTypes[6] if x != nil { ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) if ms.LoadMessageInfo() == nil { @@ -485,7 +417,7 @@ func (x *Image) ProtoReflect() protoreflect.Message { // Deprecated: Use Image.ProtoReflect.Descriptor instead. func (*Image) Descriptor() ([]byte, []int) { - return file_node_proto_rawDescGZIP(), []int{7} + return file_node_proto_rawDescGZIP(), []int{6} } func (x *Image) GetImageData() []byte { @@ -507,7 +439,7 @@ type CriuLazyPagesRequest struct { func (x *CriuLazyPagesRequest) Reset() { *x = CriuLazyPagesRequest{} - mi := &file_node_proto_msgTypes[8] + mi := &file_node_proto_msgTypes[7] ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) ms.StoreMessageInfo(mi) } @@ -519,7 +451,7 @@ func (x *CriuLazyPagesRequest) String() string { func (*CriuLazyPagesRequest) ProtoMessage() {} func (x *CriuLazyPagesRequest) ProtoReflect() protoreflect.Message { - mi := &file_node_proto_msgTypes[8] + mi := &file_node_proto_msgTypes[7] if x != nil { ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) if ms.LoadMessageInfo() == nil { @@ -532,7 +464,7 @@ func (x *CriuLazyPagesRequest) ProtoReflect() protoreflect.Message { // Deprecated: Use CriuLazyPagesRequest.ProtoReflect.Descriptor instead. func (*CriuLazyPagesRequest) Descriptor() ([]byte, []int) { - return file_node_proto_rawDescGZIP(), []int{8} + return file_node_proto_rawDescGZIP(), []int{7} } func (x *CriuLazyPagesRequest) GetCheckpointPath() string { @@ -572,7 +504,7 @@ type PullImageRequest struct { func (x *PullImageRequest) Reset() { *x = PullImageRequest{} - mi := &file_node_proto_msgTypes[9] + mi := &file_node_proto_msgTypes[8] ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) ms.StoreMessageInfo(mi) } @@ -584,7 +516,7 @@ func (x *PullImageRequest) String() string { func (*PullImageRequest) ProtoMessage() {} func (x *PullImageRequest) ProtoReflect() protoreflect.Message { - mi := &file_node_proto_msgTypes[9] + mi := &file_node_proto_msgTypes[8] if x != nil { ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) if ms.LoadMessageInfo() == nil { @@ -597,7 +529,7 @@ func (x *PullImageRequest) ProtoReflect() protoreflect.Message { // Deprecated: Use PullImageRequest.ProtoReflect.Descriptor instead. func (*PullImageRequest) Descriptor() ([]byte, []int) { - return file_node_proto_rawDescGZIP(), []int{9} + return file_node_proto_rawDescGZIP(), []int{8} } func (x *PullImageRequest) GetImageId() string { @@ -616,7 +548,7 @@ type RestoreCapacityRequest struct { func (x *RestoreCapacityRequest) Reset() { *x = RestoreCapacityRequest{} - mi := &file_node_proto_msgTypes[10] + mi := &file_node_proto_msgTypes[9] ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) ms.StoreMessageInfo(mi) } @@ -628,7 +560,7 @@ func (x *RestoreCapacityRequest) String() string { func (*RestoreCapacityRequest) ProtoMessage() {} func (x *RestoreCapacityRequest) ProtoReflect() protoreflect.Message { - mi := &file_node_proto_msgTypes[10] + mi := &file_node_proto_msgTypes[9] if x != nil { ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) if ms.LoadMessageInfo() == nil { @@ -641,7 +573,7 @@ func (x *RestoreCapacityRequest) ProtoReflect() protoreflect.Message { // Deprecated: Use RestoreCapacityRequest.ProtoReflect.Descriptor instead. func (*RestoreCapacityRequest) Descriptor() ([]byte, []int) { - return file_node_proto_rawDescGZIP(), []int{10} + return file_node_proto_rawDescGZIP(), []int{9} } func (x *RestoreCapacityRequest) GetPodInfo() *PodInfo { @@ -661,7 +593,7 @@ type RestoreCapacityResponse struct { func (x *RestoreCapacityResponse) Reset() { *x = RestoreCapacityResponse{} - mi := &file_node_proto_msgTypes[11] + mi := &file_node_proto_msgTypes[10] ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) ms.StoreMessageInfo(mi) } @@ -673,7 +605,7 @@ func (x *RestoreCapacityResponse) String() string { func (*RestoreCapacityResponse) ProtoMessage() {} func (x *RestoreCapacityResponse) ProtoReflect() protoreflect.Message { - mi := &file_node_proto_msgTypes[11] + mi := &file_node_proto_msgTypes[10] if x != nil { ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) if ms.LoadMessageInfo() == nil { @@ -686,7 +618,7 @@ func (x *RestoreCapacityResponse) ProtoReflect() protoreflect.Message { // Deprecated: Use RestoreCapacityResponse.ProtoReflect.Descriptor instead. func (*RestoreCapacityResponse) Descriptor() ([]byte, []int) { - return file_node_proto_rawDescGZIP(), []int{11} + return file_node_proto_rawDescGZIP(), []int{10} } func (x *RestoreCapacityResponse) GetAllowed() bool { @@ -718,17 +650,13 @@ const file_node_proto_rawDesc = "" + "\bpod_info\x18\x01 \x01(\v2\x18.zeropod.node.v1.PodInfoR\apodInfo\x12E\n" + "\x0emigration_info\x18\x02 \x01(\v2\x1e.zeropod.node.v1.MigrationInfoR\rmigrationInfo\"X\n" + "\x0fRestoreResponse\x12E\n" + - "\x0emigration_info\x18\x01 \x01(\v2\x1e.zeropod.node.v1.MigrationInfoR\rmigrationInfo\"8\n" + - "\bListener\x12\x12\n" + - "\x04port\x18\x01 \x01(\x05R\x04port\x12\x18\n" + - "\anetwork\x18\x02 \x01(\tR\anetwork\"\xc1\x01\n" + + "\x0emigration_info\x18\x01 \x01(\v2\x1e.zeropod.node.v1.MigrationInfoR\rmigrationInfo\"\x88\x01\n" + "\aPodInfo\x12\x12\n" + "\x04name\x18\x01 \x01(\tR\x04name\x12\x1c\n" + "\tnamespace\x18\x02 \x01(\tR\tnamespace\x12%\n" + "\x0econtainer_name\x18\x03 \x01(\tR\rcontainerName\x12\x14\n" + "\x05ports\x18\x04 \x03(\x05R\x05ports\x12\x0e\n" + - "\x02ip\x18\x05 \x01(\tR\x02ip\x127\n" + - "\tlisteners\x18\x06 \x03(\v2\x19.zeropod.node.v1.ListenerR\tlisteners\"\xf6\x02\n" + + "\x02ip\x18\x05 \x01(\tR\x02ip\"\xbd\x02\n" + "\rMigrationInfo\x12\x19\n" + "\bimage_id\x18\x01 \x01(\tR\aimageId\x12\x1d\n" + "\n" + @@ -738,8 +666,7 @@ const file_node_proto_rawDesc = "" + "\rrestore_start\x18\x05 \x01(\v2\x1a.google.protobuf.TimestampR\frestoreStart\x12;\n" + "\vrestore_end\x18\x06 \x01(\v2\x1a.google.protobuf.TimestampR\n" + "restoreEnd\x12\x14\n" + - "\x05ports\x18\a \x03(\x05R\x05ports\x127\n" + - "\tlisteners\x18\b \x03(\v2\x19.zeropod.node.v1.ListenerR\tlisteners\"%\n" + + "\x05ports\x18\a \x03(\x05R\x05ports\"%\n" + "\x05Image\x12\x1c\n" + "\timageData\x18\x01 \x01(\fR\timageData\"\x7f\n" + "\x14CriuLazyPagesRequest\x12'\n" + @@ -775,55 +702,52 @@ func file_node_proto_rawDescGZIP() []byte { return file_node_proto_rawDescData } -var file_node_proto_msgTypes = make([]protoimpl.MessageInfo, 12) +var file_node_proto_msgTypes = make([]protoimpl.MessageInfo, 11) var file_node_proto_goTypes = []any{ (*EvacRequest)(nil), // 0: zeropod.node.v1.EvacRequest (*EvacResponse)(nil), // 1: zeropod.node.v1.EvacResponse (*RestoreRequest)(nil), // 2: zeropod.node.v1.RestoreRequest (*RestoreResponse)(nil), // 3: zeropod.node.v1.RestoreResponse - (*Listener)(nil), // 4: zeropod.node.v1.Listener - (*PodInfo)(nil), // 5: zeropod.node.v1.PodInfo - (*MigrationInfo)(nil), // 6: zeropod.node.v1.MigrationInfo - (*Image)(nil), // 7: zeropod.node.v1.Image - (*CriuLazyPagesRequest)(nil), // 8: zeropod.node.v1.CriuLazyPagesRequest - (*PullImageRequest)(nil), // 9: zeropod.node.v1.PullImageRequest - (*RestoreCapacityRequest)(nil), // 10: zeropod.node.v1.RestoreCapacityRequest - (*RestoreCapacityResponse)(nil), // 11: zeropod.node.v1.RestoreCapacityResponse - (*emptypb.Empty)(nil), // 12: google.protobuf.Empty - (*timestamppb.Timestamp)(nil), // 13: google.protobuf.Timestamp + (*PodInfo)(nil), // 4: zeropod.node.v1.PodInfo + (*MigrationInfo)(nil), // 5: zeropod.node.v1.MigrationInfo + (*Image)(nil), // 6: zeropod.node.v1.Image + (*CriuLazyPagesRequest)(nil), // 7: zeropod.node.v1.CriuLazyPagesRequest + (*PullImageRequest)(nil), // 8: zeropod.node.v1.PullImageRequest + (*RestoreCapacityRequest)(nil), // 9: zeropod.node.v1.RestoreCapacityRequest + (*RestoreCapacityResponse)(nil), // 10: zeropod.node.v1.RestoreCapacityResponse + (*emptypb.Empty)(nil), // 11: google.protobuf.Empty + (*timestamppb.Timestamp)(nil), // 12: google.protobuf.Timestamp } var file_node_proto_depIdxs = []int32{ - 5, // 0: zeropod.node.v1.EvacRequest.pod_info:type_name -> zeropod.node.v1.PodInfo - 6, // 1: zeropod.node.v1.EvacRequest.migration_info:type_name -> zeropod.node.v1.MigrationInfo - 12, // 2: zeropod.node.v1.EvacResponse.empty:type_name -> google.protobuf.Empty - 5, // 3: zeropod.node.v1.RestoreRequest.pod_info:type_name -> zeropod.node.v1.PodInfo - 6, // 4: zeropod.node.v1.RestoreRequest.migration_info:type_name -> zeropod.node.v1.MigrationInfo - 6, // 5: zeropod.node.v1.RestoreResponse.migration_info:type_name -> zeropod.node.v1.MigrationInfo - 4, // 6: zeropod.node.v1.PodInfo.listeners:type_name -> zeropod.node.v1.Listener - 13, // 7: zeropod.node.v1.MigrationInfo.paused_at:type_name -> google.protobuf.Timestamp - 13, // 8: zeropod.node.v1.MigrationInfo.restore_start:type_name -> google.protobuf.Timestamp - 13, // 9: zeropod.node.v1.MigrationInfo.restore_end:type_name -> google.protobuf.Timestamp - 4, // 10: zeropod.node.v1.MigrationInfo.listeners:type_name -> zeropod.node.v1.Listener - 5, // 11: zeropod.node.v1.RestoreCapacityRequest.pod_info:type_name -> zeropod.node.v1.PodInfo - 0, // 12: zeropod.node.v1.Node.Evac:input_type -> zeropod.node.v1.EvacRequest - 0, // 13: zeropod.node.v1.Node.PrepareEvac:input_type -> zeropod.node.v1.EvacRequest - 2, // 14: zeropod.node.v1.Node.Restore:input_type -> zeropod.node.v1.RestoreRequest - 2, // 15: zeropod.node.v1.Node.FinishRestore:input_type -> zeropod.node.v1.RestoreRequest - 8, // 16: zeropod.node.v1.Node.NewCriuLazyPages:input_type -> zeropod.node.v1.CriuLazyPagesRequest - 9, // 17: zeropod.node.v1.Node.PullImage:input_type -> zeropod.node.v1.PullImageRequest - 10, // 18: zeropod.node.v1.Node.RestoreCapacity:input_type -> zeropod.node.v1.RestoreCapacityRequest - 1, // 19: zeropod.node.v1.Node.Evac:output_type -> zeropod.node.v1.EvacResponse - 1, // 20: zeropod.node.v1.Node.PrepareEvac:output_type -> zeropod.node.v1.EvacResponse - 3, // 21: zeropod.node.v1.Node.Restore:output_type -> zeropod.node.v1.RestoreResponse - 3, // 22: zeropod.node.v1.Node.FinishRestore:output_type -> zeropod.node.v1.RestoreResponse - 12, // 23: zeropod.node.v1.Node.NewCriuLazyPages:output_type -> google.protobuf.Empty - 7, // 24: zeropod.node.v1.Node.PullImage:output_type -> zeropod.node.v1.Image - 11, // 25: zeropod.node.v1.Node.RestoreCapacity:output_type -> zeropod.node.v1.RestoreCapacityResponse - 19, // [19:26] is the sub-list for method output_type - 12, // [12:19] is the sub-list for method input_type - 12, // [12:12] is the sub-list for extension type_name - 12, // [12:12] is the sub-list for extension extendee - 0, // [0:12] is the sub-list for field type_name + 4, // 0: zeropod.node.v1.EvacRequest.pod_info:type_name -> zeropod.node.v1.PodInfo + 5, // 1: zeropod.node.v1.EvacRequest.migration_info:type_name -> zeropod.node.v1.MigrationInfo + 11, // 2: zeropod.node.v1.EvacResponse.empty:type_name -> google.protobuf.Empty + 4, // 3: zeropod.node.v1.RestoreRequest.pod_info:type_name -> zeropod.node.v1.PodInfo + 5, // 4: zeropod.node.v1.RestoreRequest.migration_info:type_name -> zeropod.node.v1.MigrationInfo + 5, // 5: zeropod.node.v1.RestoreResponse.migration_info:type_name -> zeropod.node.v1.MigrationInfo + 12, // 6: zeropod.node.v1.MigrationInfo.paused_at:type_name -> google.protobuf.Timestamp + 12, // 7: zeropod.node.v1.MigrationInfo.restore_start:type_name -> google.protobuf.Timestamp + 12, // 8: zeropod.node.v1.MigrationInfo.restore_end:type_name -> google.protobuf.Timestamp + 4, // 9: zeropod.node.v1.RestoreCapacityRequest.pod_info:type_name -> zeropod.node.v1.PodInfo + 0, // 10: zeropod.node.v1.Node.Evac:input_type -> zeropod.node.v1.EvacRequest + 0, // 11: zeropod.node.v1.Node.PrepareEvac:input_type -> zeropod.node.v1.EvacRequest + 2, // 12: zeropod.node.v1.Node.Restore:input_type -> zeropod.node.v1.RestoreRequest + 2, // 13: zeropod.node.v1.Node.FinishRestore:input_type -> zeropod.node.v1.RestoreRequest + 7, // 14: zeropod.node.v1.Node.NewCriuLazyPages:input_type -> zeropod.node.v1.CriuLazyPagesRequest + 8, // 15: zeropod.node.v1.Node.PullImage:input_type -> zeropod.node.v1.PullImageRequest + 9, // 16: zeropod.node.v1.Node.RestoreCapacity:input_type -> zeropod.node.v1.RestoreCapacityRequest + 1, // 17: zeropod.node.v1.Node.Evac:output_type -> zeropod.node.v1.EvacResponse + 1, // 18: zeropod.node.v1.Node.PrepareEvac:output_type -> zeropod.node.v1.EvacResponse + 3, // 19: zeropod.node.v1.Node.Restore:output_type -> zeropod.node.v1.RestoreResponse + 3, // 20: zeropod.node.v1.Node.FinishRestore:output_type -> zeropod.node.v1.RestoreResponse + 11, // 21: zeropod.node.v1.Node.NewCriuLazyPages:output_type -> google.protobuf.Empty + 6, // 22: zeropod.node.v1.Node.PullImage:output_type -> zeropod.node.v1.Image + 10, // 23: zeropod.node.v1.Node.RestoreCapacity:output_type -> zeropod.node.v1.RestoreCapacityResponse + 17, // [17:24] is the sub-list for method output_type + 10, // [10:17] is the sub-list for method input_type + 10, // [10:10] is the sub-list for extension type_name + 10, // [10:10] is the sub-list for extension extendee + 0, // [0:10] is the sub-list for field type_name } func init() { file_node_proto_init() } @@ -837,7 +761,7 @@ func file_node_proto_init() { GoPackagePath: reflect.TypeOf(x{}).PkgPath(), RawDescriptor: unsafe.Slice(unsafe.StringData(file_node_proto_rawDesc), len(file_node_proto_rawDesc)), NumEnums: 0, - NumMessages: 12, + NumMessages: 11, NumExtensions: 0, NumServices: 1, }, diff --git a/api/node/v1/node.proto b/api/node/v1/node.proto index 428e708..c41b32f 100644 --- a/api/node/v1/node.proto +++ b/api/node/v1/node.proto @@ -35,18 +35,12 @@ message RestoreResponse { MigrationInfo migration_info = 1; } -message Listener { - int32 port = 1; - string network = 2; -} - message PodInfo { string name = 1; string namespace = 2; string container_name = 3; repeated int32 ports = 4; string ip = 5; - repeated Listener listeners = 6; } message MigrationInfo { @@ -57,7 +51,6 @@ message MigrationInfo { google.protobuf.Timestamp restore_start = 5; google.protobuf.Timestamp restore_end = 6; repeated int32 ports = 7; - repeated Listener listeners = 8; } message Image { diff --git a/api/runtime/v1/types.go b/api/runtime/v1/types.go index c98b808..46e25b1 100644 --- a/api/runtime/v1/types.go +++ b/api/runtime/v1/types.go @@ -53,11 +53,6 @@ type MigrationSpec struct { Containers []MigrationContainer `json:"containers"` } -type PodListener struct { - Port int32 `json:"port"` - Network string `json:"network"` -} - // +kubebuilder:object:generate:=true type MigrationContainer struct { Name string `json:"name"` @@ -70,8 +65,6 @@ type MigrationContainer struct { PageServer *MigrationServer `json:"pageServer,omitempty"` Ports []int32 `json:"ports,omitempty"` - - Listeners []PodListener `json:"listeners,omitempty"` } // +kubebuilder:object:generate:=true diff --git a/api/runtime/v1/zz_generated.deepcopy.go b/api/runtime/v1/zz_generated.deepcopy.go index 59e4939..910808f 100644 --- a/api/runtime/v1/zz_generated.deepcopy.go +++ b/api/runtime/v1/zz_generated.deepcopy.go @@ -69,11 +69,6 @@ func (in *MigrationContainer) DeepCopyInto(out *MigrationContainer) { *out = make([]int32, len(*in)) copy(*out, *in) } - if in.Listeners != nil { - in, out := &in.Listeners, &out.Listeners - *out = make([]PodListener, len(*in)) - copy(*out, *in) - } } // DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new MigrationContainer. diff --git a/config/crds/runtime.zeropod.ctrox.dev_migrations.yaml b/config/crds/runtime.zeropod.ctrox.dev_migrations.yaml index 5061cfa..957d7f2 100644 --- a/config/crds/runtime.zeropod.ctrox.dev_migrations.yaml +++ b/config/crds/runtime.zeropod.ctrox.dev_migrations.yaml @@ -68,19 +68,6 @@ spec: - host - port type: object - listeners: - items: - properties: - network: - type: string - port: - format: int32 - type: integer - required: - - network - - port - type: object - type: array name: type: string pageServer: diff --git a/manager/node/service.go b/manager/node/service.go index 61c0829..68c9971 100644 --- a/manager/node/service.go +++ b/manager/node/service.go @@ -440,16 +440,11 @@ func (ns *nodeService) Restore(ctx context.Context, req *nodev1.RestoreRequest) } } - listeners := []*nodev1.Listener{} - for _, ln := range container.Listeners { - listeners = append(listeners, &nodev1.Listener{Port: ln.Port, Network: ln.Network}) - } return &nodev1.RestoreResponse{ MigrationInfo: &nodev1.MigrationInfo{ ImageId: req.MigrationInfo.ImageId, LiveMigration: migration.Spec.LiveMigration, Ports: container.Ports, - Listeners: listeners, }, }, nil } @@ -789,11 +784,6 @@ func (ns *nodeService) Evac(ctx context.Context, req *nodev1.EvacRequest) (*node } mc.PageServer = pageServer mc.Ports = req.PodInfo.Ports - listeners := []v1.PodListener{} - for _, ln := range req.PodInfo.Listeners { - listeners = append(listeners, v1.PodListener{Port: ln.Port, Network: ln.Network}) - } - mc.Listeners = listeners log.Debug("found our container, setting migration servers") }); !found { return false, fmt.Errorf("migration does not have image for requested container %s", req.PodInfo.ContainerName) diff --git a/shim/checkpoint.go b/shim/checkpoint.go index f2f96fd..60233bc 100644 --- a/shim/checkpoint.go +++ b/shim/checkpoint.go @@ -2,6 +2,7 @@ package shim import ( "context" + "encoding/json" "fmt" "io" "os" @@ -14,6 +15,7 @@ import ( "github.com/containerd/containerd/v2/cmd/containerd-shim-runc-v2/process" runcC "github.com/containerd/go-runc" "github.com/containerd/log" + "github.com/ctrox/zeropod/activator" nodev1 "github.com/ctrox/zeropod/api/node/v1" v1 "github.com/ctrox/zeropod/api/shim/v1" "github.com/icza/backscanner" @@ -129,6 +131,10 @@ func (c *Container) checkpoint(ctx context.Context) error { return err } + if err := c.storeListeners(); err != nil { + log.G(ctx).WithError(err).Error("storing listeners in snaphsot path") + } + c.setPhaseNotify(v1.ContainerPhase_SCALED_DOWN, time.Since(beforeCheckpoint)) log.G(ctx).Infof("checkpointing done in %s", c.metrics.LastCheckpointDuration.AsDuration()) @@ -157,6 +163,29 @@ func (c *Container) checkpointExtraArgs() []string { return def } +func (c *Container) storeListeners() error { + f, err := os.Create(nodev1.ListenersFile(c.ID())) + if err != nil { + return err + } + defer f.Close() + listeners := c.activator.GetListeners() + return json.NewEncoder(f).Encode(listeners) +} + +func (c *Container) loadListeners() (activator.Listeners, error) { + f, err := os.Open(nodev1.ListenersFile(c.ID())) + if err != nil { + return nil, err + } + defer f.Close() + listeners := activator.Listeners{} + if err := json.NewDecoder(f).Decode(&listeners); err != nil { + return nil, err + } + return listeners, nil +} + func printCriuLogs(ctx context.Context, file string) string { lines, err := getLastLines(ctx, file, 20) if err != nil { diff --git a/shim/container.go b/shim/container.go index 27c9e22..8ce3350 100644 --- a/shim/container.go +++ b/shim/container.go @@ -31,11 +31,6 @@ import ( type HandleStartedFunc func(*runc.Container, process.Process) -type startInfo struct { - skip bool - listeners activator.Listeners -} - type Container struct { *runc.Container // mutex to lock during checkpoint/restore operations to ensure we don't try @@ -52,7 +47,7 @@ type Container struct { cgroup any logPath string scaledDown bool - startInfo startInfo + skipStart bool netNS ns.NetNS scaleDownTimer *time.Timer initTimer *time.Timer @@ -292,12 +287,12 @@ func (c *Container) sendFailEvent(phase v1.ContainerPhase, l string) { c.sendEvent(status) } -func (c *Container) SetSkipStart(startInfo startInfo) { - c.startInfo = startInfo +func (c *Container) SetSkipStart(skip bool) { + c.skipStart = skip } func (c *Container) SkipStart() bool { - return c.startInfo.skip + return c.skipStart } func (c *Container) Status() *v1.ContainerStatus { @@ -480,7 +475,7 @@ func (c *Container) initActivator(ctx context.Context) error { log.G(ctx).Infof("starting activator with ports: %v", c.cfg.Ports) if err := c.startActivator(ctx, c.cfg.Ports...); err != nil { - if errors.Is(err, activator.ErrMapNotFound) || errors.Is(err, reuse.ErrNoListeningSockets) { + if errors.Is(err, activator.ErrMapNotFound) || errors.Is(err, activator.ErrNoListeningSockets) { c.retryInitIn(c.initRetry()) return nil } @@ -520,15 +515,17 @@ func (c *Container) cancelInit() { } func (c *Container) getListeners(ports ...uint16) activator.Listeners { - if c.startInfo.skip && len(c.startInfo.listeners) > 0 { - return c.startInfo.listeners + lns, err := c.loadListeners() + if err == nil { + return lns } + listeners := activator.Listeners{} for _, port := range ports { - // fallback to just a dual-stack listener for each port. If - // !startInfo.skip, the listeners will anyways be detected from the app - // so this is only relevant if we startInfo.skip and the listeners from - // the startInfo are empty. + // fallback to just a dual-stack listener for each port. If !skipStart, + // the listeners will anyways be detected from the app so this is only + // relevant if we skipStart and the listeners from the checkpoint are + // empty listeners = append( listeners, activator.Listener{Port: port, Network: activator.NetworkTCPAny}, @@ -547,7 +544,7 @@ func (c *Container) startActivator(ctx context.Context, ports ...uint16) error { return err } - if err := c.activator.Start(c.context, c.Pid(), c.getListeners(ports...), c.startInfo.skip); err != nil { + if err := c.activator.Start(c.context, c.Pid(), c.getListeners(ports...), c.SkipStart()); err != nil { if errors.Is(err, activator.ErrMapNotFound) { return err } diff --git a/shim/evac.go b/shim/evac.go index 2acc004..a670e36 100644 --- a/shim/evac.go +++ b/shim/evac.go @@ -203,20 +203,12 @@ func (c *Container) evacScaledDown(ctx context.Context) error { for _, p := range c.cfg.Ports { ports = append(ports, int32(p)) } - listeners := []*nodev1.Listener{} - for _, ln := range c.activator.GetListeners() { - listeners = append(listeners, &nodev1.Listener{ - Port: int32(ln.Port), - Network: string(ln.Network), - }) - } evacReq := &nodev1.EvacRequest{ PodInfo: &nodev1.PodInfo{ Name: c.cfg.PodName, Namespace: c.cfg.PodNamespace, ContainerName: c.cfg.ContainerName, Ports: ports, - Listeners: listeners, }, MigrationInfo: &nodev1.MigrationInfo{ LiveMigration: false, diff --git a/shim/restore.go b/shim/restore.go index c8e6018..971a3f3 100644 --- a/shim/restore.go +++ b/shim/restore.go @@ -227,10 +227,10 @@ func createContainerLoggers(ctx context.Context, logPath string, tty bool) (stdo // MigrationRestore requests a restore from the node. If a matching migration is // found, it sets the Checkpoint path in the CreateTaskRequest. -func MigrationRestore(ctx context.Context, r *task.CreateTaskRequest, cfg *v1.Config) (startInfo, error) { +func MigrationRestore(ctx context.Context, r *task.CreateTaskRequest, cfg *v1.Config) (bool, error) { conn, err := net.Dial("unix", nodev1.SocketPath) if err != nil { - return startInfo{}, fmt.Errorf("%w: dialing node service: %w", ErrRestoreDial, err) + return false, fmt.Errorf("%w: dialing node service: %w", ErrRestoreDial, err) } log.G(ctx).Infof("creating restore request for container: %s", cfg.ContainerName) @@ -255,7 +255,7 @@ func MigrationRestore(ctx context.Context, r *task.CreateTaskRequest, cfg *v1.Co defer conn.Close() resp, err := nodeClient.Restore(ctx, restoreReq) if err != nil { - return startInfo{}, fmt.Errorf("%w: %w", ErrRestoreRequestFailed, err) + return false, fmt.Errorf("%w: %w", ErrRestoreRequestFailed, err) } if len(cfg.Ports) == 0 { for _, p := range resp.MigrationInfo.Ports { @@ -266,7 +266,7 @@ func MigrationRestore(ctx context.Context, r *task.CreateTaskRequest, cfg *v1.Co log.G(ctx).Infof("restore response: %v", resp.MigrationInfo) if err := validateCheckpointData(nodev1.SnapshotPath(resp.MigrationInfo.ImageId)); err != nil { - return startInfo{}, fmt.Errorf("%w: %w", ErrInvalidCheckpoint, err) + return false, fmt.Errorf("%w: %w", ErrInvalidCheckpoint, err) } r.Checkpoint = nodev1.SnapshotPath(resp.MigrationInfo.ImageId) log.G(ctx).Infof("setting checkpoint dir for restore: %s", r.Checkpoint) @@ -275,15 +275,11 @@ func MigrationRestore(ctx context.Context, r *task.CreateTaskRequest, cfg *v1.Co // socket needs to be there) and also so the restore stats are stored in the // image directory. if err := setCriuWorkPath(r, r.Checkpoint); err != nil { - return startInfo{}, err + return false, err } if !resp.MigrationInfo.LiveMigration { - listeners := activator.Listeners{} - for _, ln := range resp.MigrationInfo.Listeners { - listeners = append(listeners, activator.Listener{Port: uint16(ln.Port), Network: activator.Network(ln.Network)}) - } - return startInfo{skip: true, listeners: listeners}, nil + return true, nil } // wait for the lazy pages socket file to exist to ensure the pages @@ -291,10 +287,10 @@ func MigrationRestore(ctx context.Context, r *task.CreateTaskRequest, cfg *v1.Co if err := waitForLazyPagesSocket(ctx, r.Checkpoint, time.Second); err != nil { log.G(ctx).Errorf("aborting restore: %s", err) r.Checkpoint = "" - return startInfo{}, nil + return false, nil } - return startInfo{}, nil + return false, nil } // waitForLazyPagesSocket waits until the lazy-pages.socket file exists in the