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CI: update start-bosh for cgroupsv2 #2668

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Merged
rkoster merged 1 commit into from
Feb 19, 2026
Merged

CI: update start-bosh for cgroupsv2 #2668

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22 changes: 18 additions & 4 deletions ci/dockerfiles/docker-cpi/start-bosh.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,18 @@ function sanitize_cgroups() {
mountpoint -q /sys/fs/cgroup || \
mount -t tmpfs -o uid=0,gid=0,mode=0755 cgroup /sys/fs/cgroup

if [ -f /sys/fs/cgroup/cgroup.controllers ]; then
# cgroups v2: enable nesting (based on moby/moby hack/dind)
mkdir -p /sys/fs/cgroup/init
# Loop to handle races from concurrent process creation (e.g. docker exec)
while ! {
xargs -rn1 < /sys/fs/cgroup/cgroup.procs > /sys/fs/cgroup/init/cgroup.procs 2>/dev/null || :
sed -e 's/ / +/g' -e 's/^/+/' < /sys/fs/cgroup/cgroup.controllers \
> /sys/fs/cgroup/cgroup.subtree_control
}; do true; done
return
fi

mount -o remount,rw /sys/fs/cgroup

# shellcheck disable=SC2034
Expand Down Expand Up @@ -106,10 +118,12 @@ function start_docker() {

sanitize_cgroups

# ensure systemd cgroup is present
mkdir -p /sys/fs/cgroup/systemd
if ! mountpoint -q /sys/fs/cgroup/systemd ; then
mount -t cgroup -o none,name=systemd cgroup /sys/fs/cgroup/systemd
# ensure systemd cgroup is present (cgroups v1 only)
if [ ! -f /sys/fs/cgroup/cgroup.controllers ]; then
mkdir -p /sys/fs/cgroup/systemd
if ! mountpoint -q /sys/fs/cgroup/systemd ; then
mount -t cgroup -o none,name=systemd cgroup /sys/fs/cgroup/systemd
fi
fi

# check for /proc/sys being mounted readonly, as systemd does
Expand Down
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