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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 "${LXC_ROOTFS_MOUNT}") # /proc files if [ -d /var/snap/lxd/common/var/lib/lxcfs/proc/ ]; then for entry in /var/snap/lxd/common/var/lib/lxcfs/proc/*; do DEST=$(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 /var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu ] ; then if [ -f /var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/uevent ]; then mount -n --bind /var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu "${LXC_ROOTFS_MOUNT}/sys/devices/system/cpu" else for entry in /var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/*; do DEST=$(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 "${LXC_ROOTFS_MOUNT}/var/snap/lxd/" ]; then rm -Rf "${LXC_ROOTFS_MOUNT}/var/snap/lxd/common/var/lib/lxcfs" mkdir -p "${LXC_ROOTFS_MOUNT}/var/snap/lxd/common/var/lib/lxcfs" mount -n --bind /var/snap/lxd/common/var/lib/lxcfs "${LXC_ROOTFS_MOUNT}/var/snap/lxd/common/var/lib/lxcfs/" fi # For backward compatibility, hand `/var/lib/lxcfs` through the host to # the container being as the lxcfs mount point. if [ -d "${LXC_ROOTFS_MOUNT}/var/lib/lxcfs/" ]; then mount -n --bind /var/snap/lxd/common/var/lib/lxcfs "${LXC_ROOTFS_MOUNT}/var/lib/lxcfs/" 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 "${LXC_ROOTFS_MOUNT}/sys/fs/cgroup" ]; then if [ -d /var/snap/lxd/common/var/lib/lxcfs/cgroup ]; then # Cleanup existing mounts for entry in "${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/${DEST}" done # Mount the new entries for entry in /var/snap/lxd/common/var/lib/lxcfs/cgroup/*; do DEST=$(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
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