feat(image): make /var stateful

image/mkimage.sh

@@ -13,11 +13,28 @@ find rootfs/ -type d -exec chmod 755 {} \;
 mkdir rootfs/usr/lib/systemd/system/basic.target.wants
 ln -sf basic.target rootfs/usr/lib/systemd/system/default.target
 
+# mount patos state
+cat <<EOF > rootfs/usr/lib/systemd/system/var.mount
+[Unit]
+Description=Mount for /var
+Before=local-fs.target
+
+[Mount]
+What=/dev/disk/by-label/patos-state
+Where=/var
+Type=ext2
+Options=defaults
+
+[Install]
+WantedBy=basic.target
+EOF
+ln -sf ../var.mount rootfs/usr/lib/systemd/system/basic.target.wants/var.mount
+
 # enable dbus
 ln -sf ../dbus.service rootfs/usr/lib/systemd/system/basic.target.wants/dbus.service
 ln -sf ../dbus.socket rootfs/usr/lib/systemd/system/sockets.target.wants/dbus.socket
 
-# generate machine-id
+# generate a temporary machine id
 $systemd/usr/bin/systemd-machine-id-setup --root=rootfs/
 
 cat <<EOF > rootfs/etc/passwd