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|
#!/bin/bash
set -e
### BEGIN INIT INFO
# Provides: docker
# Required-Start: $syslog $remote_fs
# Required-Stop: $syslog $remote_fs
# Should-Start: cgroupfs-mount cgroup-lite
# Should-Stop: cgroupfs-mount cgroup-lite
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Create lightweight, portable, self-sufficient containers.
# Description:
# Docker is an open-source project to easily create lightweight, portable,
# self-sufficient containers from any application. The same container that a
# developer builds and tests on a laptop can run at scale, in production, on
# VMs, bare metal, OpenStack clusters, public clouds and more.
### END INIT INFO
export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
BASE=docker
# modify these in /etc/default/$BASE (/etc/default/docker)
DOCKERD=/usr/sbin/dockerd
# This is the pid file managed by docker itself
DOCKER_PIDFILE=/var/run/$BASE.pid
# This is the pid file created/managed by start-stop-daemon
DOCKER_SSD_PIDFILE=/var/run/$BASE-ssd.pid
DOCKER_LOGFILE=/var/log/$BASE.log
DOCKER_OPTS=
DOCKER_DESC="Docker"
# Get lsb functions
. /lib/lsb/init-functions
if [ -f /etc/default/$BASE ]; then
. /etc/default/$BASE
fi
# Check docker is present
if [ ! -x $DOCKERD ]; then
log_failure_msg "$DOCKERD not present or not executable"
exit 1
fi
fail_unless_root() {
if [ "$(id -u)" != '0' ]; then
log_failure_msg "$DOCKER_DESC must be run as root"
exit 1
fi
}
cgroupfs_mount() {
# 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
return
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
)
}
case "$1" in
start)
fail_unless_root
cgroupfs_mount
touch "$DOCKER_LOGFILE"
chgrp docker "$DOCKER_LOGFILE"
ulimit -n 1048576
# Having non-zero limits causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
if [ "$BASH" ]; then
ulimit -u unlimited
else
ulimit -p unlimited
fi
log_begin_msg "Starting $DOCKER_DESC: $BASE"
$0 status >>/dev/null \
|| start-stop-daemon --start --background \
--no-close \
--exec "$DOCKERD" \
--pidfile "$DOCKER_SSD_PIDFILE" \
--make-pidfile \
-- \
-p "$DOCKER_PIDFILE" \
$DOCKER_OPTS \
>> "$DOCKER_LOGFILE" 2>&1
log_end_msg $?
;;
stop)
fail_unless_root
if [ -f "$DOCKER_SSD_PIDFILE" ]; then
log_begin_msg "Stopping $DOCKER_DESC: $BASE"
start-stop-daemon --stop --pidfile "$DOCKER_SSD_PIDFILE" --remove-pidfile --retry 10
log_end_msg $?
else
log_warning_msg "Docker already stopped - file $DOCKER_SSD_PIDFILE not found."
fi
;;
restart)
fail_unless_root
docker_pid=$(cat "$DOCKER_SSD_PIDFILE" 2> /dev/null)
[ -n "$docker_pid" ] \
&& ps -p $docker_pid > /dev/null 2>&1 \
&& $0 stop
$0 start
;;
force-reload)
fail_unless_root
$0 restart
;;
status)
status_of_proc -p "$DOCKER_SSD_PIDFILE" "$DOCKERD" "$DOCKER_DESC"
;;
*)
echo "Usage: service docker {start|stop|restart|status}"
exit 1
;;
esac
|
