| #!/usr/bin/env bash |
| |
| set -o errexit -o nounset -o pipefail |
| |
| # For each cgroup subsystem, Docker does a bind mount from the current |
| # cgroup to the root of the cgroup subsystem. For instance: |
| # /sys/fs/cgroup/memory/docker/<cid> -> /sys/fs/cgroup/memory |
| # |
| # This will confuse Mesos agent because it relies on proc file |
| # '/proc/<pid>/cgroup` to determine the cgroup of a given process, and |
| # this proc file is not affected by the bind mount. |
| # |
| # The following is a workaround to recreate the original cgroup |
| # environment by doing another bind mount for each subsystem. |
| MOUNT_TABLE=$(cat /proc/self/mountinfo) |
| DOCKER_CGROUP_MOUNTS=$(echo "${MOUNT_TABLE}" | grep /sys/fs/cgroup | grep docker) |
| DOCKER_CGROUP=$(echo "${DOCKER_CGROUP_MOUNTS}" | head -n 1 | cut -d' ' -f 4) |
| CGROUP_SUBSYSTEMS=$(echo "${DOCKER_CGROUP_MOUNTS}" | cut -d' ' -f 5) |
| |
| echo "${CGROUP_SUBSYSTEMS}" | |
| while IFS= read -r SUBSYSTEM; do |
| mkdir -p "${SUBSYSTEM}${DOCKER_CGROUP}" |
| mount --bind "${SUBSYSTEM}" "${SUBSYSTEM}${DOCKER_CGROUP}" |
| done |
| |
| exec /usr/sbin/init |
