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|
#!/bin/sh -e
# Parse command flags
while [ ! $# -eq 0 ]
do
case "$1" in
--skip-cgroup-mounts )
SKIP_CGROUP_MOUNTS=1
;;
esac
shift
done
# We're dealing with mount entries, so expand any symlink
LXC_ROOTFS_MOUNT=$(readlink -f "${LXC_ROOTFS_MOUNT}")
# /proc files
if [ -d {{LXCFSTARGETDIR}}/proc/ ]; then
for entry in {{LXCFSTARGETDIR}}/proc/*; do
DEST=$(basename "$entry")
[ -e "${LXC_ROOTFS_MOUNT}/proc/${DEST}" ] || continue
mount -n --bind "$entry" "${LXC_ROOTFS_MOUNT}/proc/${DEST}"
done
fi
# /sys/devices/system/cpu
if [ -d {{LXCFSTARGETDIR}}/sys/devices/system/cpu ] ; then
if [ -f {{LXCFSTARGETDIR}}/sys/devices/system/cpu/uevent ]; then
mount -n --bind {{LXCFSTARGETDIR}}/sys/devices/system/cpu "${LXC_ROOTFS_MOUNT}/sys/devices/system/cpu"
else
for entry in {{LXCFSTARGETDIR}}/sys/devices/system/cpu/*; do
DEST=$(basename "$entry")
[ -e "${LXC_ROOTFS_MOUNT}/sys/devices/system/cpu/${DEST}" ] || continue
mount -n --bind "$entry" "${LXC_ROOTFS_MOUNT}/sys/devices/system/cpu/${DEST}"
done
fi
fi
# Allow nesting lxcfs
if [ -d "${LXC_ROOTFS_MOUNT}{{LXCFSTARGETDIR}}/" ]; then
mount -n --bind {{LXCFSTARGETDIR}} "${LXC_ROOTFS_MOUNT}{{LXCFSTARGETDIR}}/"
fi
# no need for lxcfs cgroups if we have cgroup namespaces
[ -n "$LXC_CGNS_AWARE" ] && [ -f /proc/self/ns/cgroup ] && exit 0
# Don't mess with containers that don't have /sys/fs/cgroup configured
# (lxc.mount.auto = cgroup:mixed)
if touch "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/lxcfs"; then
rm "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/lxcfs"
else
exit 0
fi
# Skip mounting cgroup tree if requested.
if [ "${SKIP_CGROUP_MOUNTS}" = "1" ]; then
exit 0
fi
# /sys/fs/cgroup files
if [ -d "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup" ]; then
if [ -d {{LXCFSTARGETDIR}}/cgroup ]; then
# Cleanup existing mounts
for entry in "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup"/*; do
DEST=$(basename "$entry")
if [ "${DEST}" = "cgmanager" ]; then
continue
fi
if [ ! -d "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/${DEST}" ]; then
continue
fi
while grep -q "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/${DEST}" /proc/self/mountinfo; do
grep "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/${DEST}" /proc/self/mountinfo | cut -d' ' -f5 | while read -r line; do
[ -e "${line}" ] || continue
umount -l "${line}" || true
done
done
rm -Rf "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/${DEST}"
done
# Mount the new entries
for entry in {{LXCFSTARGETDIR}}/cgroup/*; do
DEST=$(basename "$entry")
if [ "$DEST" = "name=systemd" ]; then
DEST="systemd"
fi
if [ ! -d "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/${DEST}" ]; then
mkdir "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/${DEST}"
fi
mount -n --bind "$entry" "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/${DEST}"
# make sure that cpu,cpuacct shows up as cpu and cpuacct
# separately, else systemd is unhappy
if echo "$DEST" | grep -q ","; then
arr=$(echo "$DEST" | tr "," "\n")
for single in $arr
do
if [ ! -L "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/${single}" ]; then
ln -s "$DEST" "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup/${single}"
fi
done
fi
done
fi
fi
exit 0
|
