share/lxc.mount.hook.in

   1 #!/bin/sh -e
   2
   3 # We're dealing with mount entries, so expand any symlink
   4 LXC_ROOTFS_MOUNT=$(readlink -f ${LXC_ROOTFS_MOUNT})
   5
   6 # /proc files
   7 if [ -d @LXCFSTARGETDIR@/proc/ ]; then
   8     for entry in @LXCFSTARGETDIR@/proc/*; do
   9         [ -e "${LXC_ROOTFS_MOUNT}/proc/$(basename $entry)" ] || continue
  10         mount -n --bind $entry ${LXC_ROOTFS_MOUNT}/proc/$(basename $entry)
  11     done
  12 fi
  13
  14
  15 # Allow nesting lxcfs
  16 if [ -d ${LXC_ROOTFS_MOUNT}@LXCFSTARGETDIR@/ ]; then
  17     mount -n --bind @LXCFSTARGETDIR@ ${LXC_ROOTFS_MOUNT}@LXCFSTARGETDIR@/
  18 fi
  19
  20 # no need for lxcfs cgroups if we have cgroup namespaces
  21 [ -n "$LXC_CGNS_AWARE" ] && [ -f /proc/self/ns/cgroup ] && exit 0
  22
  23 # Don't mess with containers that don't have /sys/fs/cgroup configured
  24 # (lxc.mount.auto = cgroup:mixed)
  25 if touch ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/lxcfs; then
  26     rm ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/lxcfs
  27 else
  28     exit 0
  29 fi
  30
  31 # /sys/fs/cgroup files
  32 if [ -d "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup" ]; then
  33     if [ -d @LXCFSTARGETDIR@/cgroup ]; then
  34         # Cleanup existing mounts
  35         for entry in ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/*; do
  36             DEST=$(basename $entry)
  37
  38             if [ "${DEST}" = "cgmanager" ]; then
  39                 continue
  40             fi
  41
  42             if [ ! -d "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/${DEST}" ]; then
  43                 continue
  44             fi
  45
  46             while grep -q "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/${DEST}" /proc/self/mountinfo; do
  47                 grep "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/${DEST}" /proc/self/mountinfo | cut -d' ' -f5 | while read line; do
  48                      [ -e "${line}" ] && umount -l "${line}" || true
  49                 done
  50             done
  51
  52             rm -Rf ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/${DEST}
  53         done
  54
  55         # Mount the new entries
  56         for entry in @LXCFSTARGETDIR@/cgroup/*; do
  57             DEST=$(basename $entry)
  58             if [ "$DEST" = "name=systemd" ]; then
  59                 DEST="systemd"
  60             fi
  61
  62             if [ ! -d ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/${DEST} ]; then
  63                 mkdir ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/${DEST}
  64             fi
  65
  66             mount -n --bind $entry ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/$DEST
  67
  68             # make sure that cpu,cpuacct shows up as cpu and cpuacct
  69             # separately, else systemd is unhappy
  70             if echo $DEST | grep -q ","; then
  71                 arr=$(echo $DEST | tr "," "\n")
  72                 for single in $arr
  73                 do
  74                     if [ ! -L ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/$single ]; then
  75                         ln -s $DEST ${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/$single
  76                     fi
  77                 done
  78             fi
  79         done
  80     fi
  81 fi
  82
  83 exit 0