share/lxc.mount.hook.in

   1 #!/bin/sh -eu
   2
   3 # Don't mess with containers that don't have /sys/fs/cgroup configured
   4 # (lxc.mount.auto = cgroup:mixed)
   5
   6 if touch ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/lxcfs; then
   7     rm ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/lxcfs
   8 else
   9     exit 0
  10 fi
  11
  12 # /proc files
  13 if [ -d @LXCFSTARGETDIR@/proc/ ]; then
  14     for entry in @LXCFSTARGETDIR@/proc/*; do
  15         [ -e "${LXC_ROOTFS_MOUNT}/proc/$(basename $entry)" ] || continue
  16         mount -n --bind $entry ${LXC_ROOTFS_MOUNT}/proc/$(basename $entry)
  17     done
  18 fi
  19
  20 # /sys/fs/cgroup files
  21 if [ -d "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup" ]; then
  22     if [ -d @LXCFSTARGETDIR@/cgroup ]; then
  23         for entry in @LXCFSTARGETDIR@/cgroup/*; do
  24             DEST=$(basename $entry)
  25             if [ "$DEST" = "name=systemd" ]; then
  26                 DEST="systemd"
  27             fi
  28
  29             if mountpoint -q ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/$DEST; then
  30                 continue
  31             fi
  32
  33             if [ ! -d ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/$DEST ]; then
  34                 mkdir ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/$DEST
  35             fi
  36
  37             mount -n --bind $entry ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/$DEST
  38
  39             # make sure that cpu,cpuacct shows up as cpu and cpuacct
  40             # separately, else systemd is unhappy
  41             if echo $DEST | grep -q ","; then
  42                 arr=$(echo $DEST | tr "," "\n")
  43                 for single in $arr
  44                 do
  45                     if [ ! -L ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/$single ]; then
  46                         ln -s $DEST ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/$single
  47                     fi
  48                 done
  49             fi
  50         done
  51
  52         if [ -d ${LXC_ROOTFS_MOUNT}@LXCFSTARGETDIR@/ ]; then
  53             mount -n --bind @LXCFSTARGETDIR@ ${LXC_ROOTFS_MOUNT}@LXCFSTARGETDIR@/
  54         fi
  55     fi
  56 fi
  57
  58 exit 0