Convoy init.d script

convoy

#!/bin/sh
set -e

### BEGIN INIT INFO
# Provides:           convoy
# 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:  Manage container volumes
### END INIT INFO

export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin

BASE=convoy

# modify these in /etc/default/$BASE (/etc/default/docker)
CONVOY=/usr/local/bin/$BASE
# This is the pid file managed by docker itself
CONVOY_PIDFILE=/var/run/$BASE.pid
# This is the pid file created/managed by start-stop-daemon
CONVOY_SSD_PIDFILE=/var/run/$BASE-ssd.pid
CONVOY_LOGFILE=/var/log/$BASE.log
CONVOY_DESC="Convoy"
CONVOY_SOCKETFILE=/var/run/convoy/convoy.sock
plugin_spec_file=/etc/docker/plugins/convoy.spec

# Get lsb functions
. /lib/lsb/init-functions

if [ -f /etc/default/$BASE ]; then
	. /etc/default/$BASE
fi

# Check docker is present
if [ ! -x $CONVOY ]; then
	log_failure_msg "$CONVOY not present or not executable"
	exit 1
fi

fail_unless_root() {
	if [ "$(id -u)" != '0' ]; then
		log_failure_msg "$CONVOY_DESC must be run as root"
		exit 1
	fi
}

case "$1" in
	start)

		fail_unless_root

		touch "$CONVOY_LOGFILE"
		mkdir -p /var/run/$BASE
		chown -R root:convoy /var/run/$BASE
		chgrp convoy "$CONVOY_LOGFILE"

		ulimit -n 1048576
		if [ "$BASH" ]; then
			ulimit -u 1048576
		else
			ulimit -p 1048576
		fi

		echo "unix://${CONVOY_SOCKETFILE}" > $plugin_spec_file

		log_begin_msg "Starting $CONVOY_DESC: $BASE"
		start-stop-daemon --start --background \
			--no-close \
			--exec "$CONVOY" \
			--pidfile "$CONVOY_SSD_PIDFILE" \
			--group convoy \
			--make-pidfile \
			--start -- \
				--socket="$CONVOY_SOCKETFILE" daemon $CONVOY_OPTS \
					>> "$CONVOY_LOGFILE" 2>&1
		log_end_msg $?
		sleep 2
		if [ "$(stat --format="%a" $CONVOY_SOCKETFILE)" != "660" ]; then
			chmod 0660 $CONVOY_SOCKETFILE 2> /dev/null
			ok=$?
		fi
		;;

	stop)
		fail_unless_root
		log_begin_msg "Stopping $CONVOY_DESC: $BASE"
		rm -f $plugin_spec_file
		start-stop-daemon --stop --pidfile "$CONVOY_SSD_PIDFILE" --retry 10
		log_end_msg $?
		;;

	restart)
		fail_unless_root
		convoy_pid=`cat "$CONVOY_SSD_PIDFILE" 2>/dev/null`
		[ -n "$convoy_pid" ] \
			&& ps -p $convoy_pid > /dev/null 2>&1 \
			&& $0 stop
		$0 start
		;;

	force-reload)
		fail_unless_root
		$0 restart
		;;

	status)
		status_of_proc -p "$CONVOY_SSD_PIDFILE" "$CONVOY" "$CONVOY_DESC"
		;;

	*)
		echo "Usage: service $BASE {start|stop|restart|status}"
		exit 1
		;;
esac

Stolen from Docker and slightly modified for Convoy. It expects a convoy group to exist (like docker), but runs as root. You should also have pre-created the directories.

My /etc/default/convoy file looks like this:

# Use CONVOY_OPTS to modify the daemon startup options.
CONVOY_OPTS="--drivers vfs --driver-opts vfs.path=/var/lib/convoy/volumes"