Docker upstart config

docker.conf

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
respawn limit 2 10

pre-start script
  [ -x /sbin/sysctl ] || exit 6
  /sbin/sysctl -w net.ipv4.ip_forward=1 > /dev/null 2>&1
  /sbin/sysctl -w net.ipv6.conf.all.forwarding=1 > /dev/null 2>&1

  # 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_DAEMON_OPTS=
  if [ -f /etc/default/$UPSTART_JOB ]; then
    . /etc/default/$UPSTART_JOB
  fi
  exec /usr/bin/docker daemon --dns=8.8.8.8 --group=docker --log-driver=fluentd --log-opt=fluentd-address=127.0.0.1:24224 --pidfile=/var/run/docker.pid --storage-driver=btrfs --userland-proxy=false >> /var/log/docker.log
end script

# Don't emit "started" event until docker.sock is ready.
# See https://github.com/docker/docker/issues/6647
post-start script
    running() {
        RUNNING=1
        RESPONSE=`/usr/bin/docker  ps 2>&1 | head -n 1`
        local mret=$?
        if [ $mret -eq 0 ] \
        || [ `echo $RESPONSE | grep -q "Is your docker"` ]; then
            RUNNING=0
        fi
        return $RUNNING
    }

    while ! running ; do
      initctl status $UPSTART_JOB | grep -q "stop/" && exit 1
      echo "Waiting for Docker"
      sleep 0.1
    done

    echo "Docker is up"
  fi
end script