Add persistent /data partition and automatic mount support (#30)

meta-edgeos/recipes-core/images/edgeos-image.bb

@@ -44,4 +44,6 @@ BUILDCFG_VARS += " \
 # Disable WIC's automatic fstab updates
 WIC_CREATE_EXTRA_ARGS = "--no-fstab-update"
 
-IMAGE_INSTALL:append = "expand-rootfs"
+IMAGE_INSTALL:append = "expand-rootfs"
+
+IMAGE_INSTALL:append = " persistent-storage"

meta-edgeos/recipes-core/persistent-storage/files/data-setup.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=Prepare /data for application
+After=data.mount
+Requires=data.mount
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/data-setup.sh
+RemainAfterExit=yes
+
+[Install]
+WantedBy=multi-user.target

meta-edgeos/recipes-core/persistent-storage/files/data-setup.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+set -eu
+mkdir -p /data/updateapp
+chmod 700 /data/updateapp

meta-edgeos/recipes-core/persistent-storage/files/data.mount

@@ -0,0 +1,13 @@
+[Unit]
+Description=Mount persistent data partition
+After=local-fs-pre.target
+Before=local-fs.target
+
+[Mount]
+What=/dev/disk/by-partlabel/data
+Where=/data
+Type=ext4
+Options=defaults,noatime
+
+[Install]
+WantedBy=multi-user.target

meta-edgeos/recipes-core/persistent-storage/persistent-storage.bb

@@ -0,0 +1,28 @@
+SUMMARY = "Persistent data partition mount + setup"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
+
+SRC_URI = " \
+  file://data.mount \
+  file://data-setup.service \
+  file://data-setup.sh \
+"
+
+inherit systemd
+
+SYSTEMD_SERVICE:${PN} = "data.mount data-setup.service"
+SYSTEMD_AUTO_ENABLE:${PN} = "enable"
+
+do_install() {
+    install -d ${D}${systemd_unitdir}/system
+    install -m 0644 ${WORKDIR}/data.mount ${D}${systemd_unitdir}/system/
+    install -m 0644 ${WORKDIR}/data-setup.service ${D}${systemd_unitdir}/system/
+    install -d ${D}${bindir}
+    install -m 0755 ${WORKDIR}/data-setup.sh ${D}${bindir}/
+}
+
+FILES:${PN} += " \
+  ${systemd_unitdir}/system/data.mount \
+  ${systemd_unitdir}/system/data-setup.service \
+  ${bindir}/data-setup.sh \
+"

meta-edgeos/recipes-support/expand-rootfs/expand-rootfs.bb

@@ -2,9 +2,6 @@ SUMMARY = "First-boot rootfs auto-expansion service"
 DESCRIPTION = "Expands the active root partition and grows the filesystem on first boot."
 LICENSE = "CLOSED"
 
-PR = "r4"
-
-
 SRC_URI = " \
     file://expand-rootfs.sh \
     file://expand-rootfs.service \

meta-edgeos/wic/rpi-partuuid.wks

@@ -1,3 +1,4 @@
 bootloader --ptable gpt
 part /boot --source bootimg-partition --ondisk mmcblk0 --fstype=vfat --label boot --active --align 4096 --size 128M --uuid "${EDGE_BOOT_PARTUUID}"
-part / --source rootfs --ondisk mmcblk0 --fstype=ext4 --label root --align 4096 --size 8192M --uuid "${EDGE_ROOT_PARTUUID}"
+part / --source rootfs --ondisk mmcblk0 --fstype=ext4 --label root --align 4096 --size 8192M --uuid "${EDGE_ROOT_PARTUUID}"
+part --ondisk mmcblk --fstype=ext4 --label data --align 4 --size 1024 --use-uuid