contrib/init/upstart/docker.conf

   1 description "Docker daemon"
   2
   3 start on (filesystem and net-device-up IFACE!=lo)
   4 stop on runlevel [!2345]
   5
   6 limit nofile 524288 1048576
   7
   8 # Having non-zero limits causes performance problems due to accounting overhead
   9 # in the kernel. We recommend using cgroups to do container-local accounting.
  10 limit nproc unlimited unlimited
  11
  12 respawn
  13
  14 kill timeout 20
  15
  16 pre-start script
  17         # see also https://github.com/tianon/cgroupfs-mount/blob/master/cgroupfs-mount
  18         if grep -v '^#' /etc/fstab | grep -q cgroup \
  19                 || [ ! -e /proc/cgroups ] \
  20                 || [ ! -d /sys/fs/cgroup ]; then
  21                 exit 0
  22         fi
  23         if ! mountpoint -q /sys/fs/cgroup; then
  24                 mount -t tmpfs -o uid=0,gid=0,mode=0755 cgroup /sys/fs/cgroup
  25         fi
  26         (
  27                 cd /sys/fs/cgroup
  28                 for sys in $(awk '!/^#/ { if ($4 == 1) print $1 }' /proc/cgroups); do
  29                         mkdir -p $sys
  30                         if ! mountpoint -q $sys; then
  31                                 if ! mount -n -t cgroup -o $sys cgroup $sys; then
  32                                         rmdir $sys || true
  33                                 fi
  34                         fi
  35                 done
  36         )
  37 end script
  38
  39 script
  40         # modify these in /etc/default/$UPSTART_JOB (/etc/default/docker)
  41         DOCKERD=/usr/bin/dockerd
  42         DOCKER_OPTS=
  43         if [ -f /etc/default/$UPSTART_JOB ]; then
  44                 . /etc/default/$UPSTART_JOB
  45         fi
  46         exec "$DOCKERD" $DOCKER_OPTS --raw-logs
  47 end script
  48
  49 # Don't emit "started" event until docker.sock is ready.
  50 # See https://github.com/docker/docker/issues/6647
  51 post-start script
  52         DOCKER_OPTS=
  53         DOCKER_SOCKET=
  54         if [ -f /etc/default/$UPSTART_JOB ]; then
  55                 . /etc/default/$UPSTART_JOB
  56         fi
  57
  58         if ! printf "%s" "$DOCKER_OPTS" | grep -qE -e '-H|--host'; then
  59                 DOCKER_SOCKET=/var/run/docker.sock
  60         else
  61                 DOCKER_SOCKET=$(printf "%s" "$DOCKER_OPTS" | grep -oP -e '(-H|--host)\W*unix://\K(\S+)' | sed 1q)
  62         fi
  63
  64         if [ -n "$DOCKER_SOCKET" ]; then
  65                 while ! [ -e "$DOCKER_SOCKET" ]; do
  66                         initctl status $UPSTART_JOB | grep -qE "(stop|respawn)/" && exit 1
  67                         echo "Waiting for $DOCKER_SOCKET"
  68                         sleep 0.1
  69                 done
  70                 echo "$DOCKER_SOCKET is up"
  71         fi
  72 end script