share/lxc.mount.hook.in

   1 #!/bin/sh -e
   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 $entry)
  17     done
  18 fi
  19
  20 # no need for lxcfs cgroups if we have cgroup namespaces
  21 [ -n "$LXC_CGNS_AWARE" ] && [ -f /proc/self/ns/cgroup ] && exit 0
  22
  23 # /sys/fs/cgroup files
  24 if [ -d "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup" ]; then
  25     if [ -d @LXCFSTARGETDIR@/cgroup ]; then
  26         for entry in @LXCFSTARGETDIR@/cgroup/*; do
  27             DEST=$(basename $entry)
  28             if [ "$DEST" = "name=systemd" ]; then
  29                 DEST="systemd"
  30             fi
  31
  32             if mountpoint -q ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/$DEST; then
  33                 continue
  34             fi
  35
  36             if [ ! -d ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/$DEST ]; then
  37                 mkdir ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/$DEST
  38             fi
  39
  40             mount -n --bind $entry ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/$DEST
  41
  42             # make sure that cpu,cpuacct shows up as cpu and cpuacct
  43             # separately, else systemd is unhappy
  44             if echo $DEST | grep -q ","; then
  45                 arr=$(echo $DEST | tr "," "\n")
  46                 for single in $arr
  47                 do
  48                     if [ ! -L ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/$single ]; then
  49                         ln -s $DEST ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/$single
  50                     fi
  51                 done
  52             fi
  53         done
  54
  55         if [ -d ${LXC_ROOTFS_MOUNT}@LXCFSTARGETDIR@/ ]; then
  56             mount -n --bind @LXCFSTARGETDIR@ ${LXC_ROOTFS_MOUNT}@LXCFSTARGETDIR@/
  57         fi
  58     fi
  59 fi
  60
  61 exit 0