description "Docker daemon" start on (local-filesystems and net-device-up IFACE!=lo) stop on runlevel [!2345] limit nofile 524288 1048576 limit nproc 524288 1048576 respawn kill timeout 20 pre-start script # see also https://github.com/tianon/cgroupfs-mount/blob/master/cgroupfs-mount if grep -v '^#' /etc/fstab | grep -q cgroup \ || [ ! -e /proc/cgroups ] \ || [ ! -d /sys/fs/cgroup ]; then exit 0 fi if ! mountpoint -q /sys/fs/cgroup; then mount -t tmpfs -o uid=0,gid=0,mode=0755 cgroup /sys/fs/cgroup fi ( cd /sys/fs/cgroup for sys in $(awk '!/^#/ { if ($4 == 1) print $1 }' /proc/cgroups); do mkdir -p $sys if ! mountpoint -q $sys; then if ! mount -n -t cgroup -o $sys cgroup $sys; then rmdir $sys || true fi fi done ) end script script # modify these in /etc/default/$UPSTART_JOB (/etc/default/docker) DOCKER=/usr/bin/$UPSTART_JOB DOCKER_OPTS= if [ -f /etc/default/$UPSTART_JOB ]; then . /etc/default/$UPSTART_JOB fi exec "$DOCKER" daemon $DOCKER_OPTS end script # Don't emit "started" event until docker.sock is ready. # See https://github.com/docker/docker/issues/6647 post-start script DOCKER_OPTS= if [ -f /etc/default/$UPSTART_JOB ]; then . /etc/default/$UPSTART_JOB fi if ! printf "%s" "$DOCKER_OPTS" | grep -qE -e '-H|--host'; then while ! [ -e /var/run/docker.sock ]; do initctl status $UPSTART_JOB | grep -qE "(stop|respawn)/" && exit 1 echo "Waiting for /var/run/docker.sock" sleep 0.1 done echo "/var/run/docker.sock is up" fi end script