Unicorn Config Rackspace (init.d)

unicorn

#! /bin/sh

PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="Unicorn server"
NAME=unicorn
RVM=/usr/local/rvm/bin/rvm
RVM_EXEC_ARGS="1.9.3@application exec"
RAILS_DIR=/data/application
DAEMON=$RVM
DAEMON_ARGS="$RVM_EXEC_ARGS $RAILS_DIR/bin/unicorn -c $RAILS_DIR/config/unicorn.rb -E staging -D"
PIDFILE=/var/run/$NAME/server.pid
USER=vader
SCRIPTNAME=/etc/init.d/$NAME

# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0

# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME

# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions

# unicorn needs some environment vars
. /etc/environment

# Create /var/run dir if missing
if [ ! -d /var/run/unicorn ]; then
  mkdir -m 0755 /var/run/unicorn
  chown $USER /var/run/unicorn
fi

symlink_resque() {
	ln -sfT `$RVM $RVM_EXEC_ARGS which resque | tail -1`/server/public $RAILS_DIR/public/resque
}

#
# Function that starts the daemon/service
#
do_start()
{
	# Return
	#   0 if daemon has been started
	#   1 if daemon was already running
	#   2 if daemon could not be started
	symlink_resque
	start-stop-daemon --start --quiet --pidfile $PIDFILE --chuid $USER --exec $DAEMON --test > /dev/null \
		|| return 1
	start-stop-daemon --start --quiet --pidfile $PIDFILE --chuid $USER --exec $DAEMON -- \
		$DAEMON_ARGS \
		|| return 2
	# Add code here, if necessary, that waits for the process to be ready
	# to handle requests from services started subsequently which depend
	# on this one.  As a last resort, sleep for some time.
}

#
# Function that stops the daemon/service
#
do_stop()
{
	# Return
	#   0 if daemon has been stopped
	#   1 if daemon was already stopped
	#   2 if daemon could not be stopped
	#   other if a failure occurred
	start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE
	RETVAL="$?"
	[ "$RETVAL" = 2 ] && return 2
	# Ensure the pidfile is cleared
	rm -f $PIDFILE
	return "$RETVAL"
}

#
# Function that sends a SIGHUP to the daemon/service
#
do_reload() {
	symlink_resque
	start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE
	return 0
}

#
# Function that sends a SIGUSR2 to the daemon/service
#
do_graceful_reload() {
	symlink_resque
	start-stop-daemon --stop --signal USR2 --quiet --pidfile $PIDFILE
	return 0
}

case "$1" in
  start)
	[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
	do_start
	case "$?" in
		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  stop)
	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
	do_stop
	case "$?" in
		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  status)
       status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
       ;;
  reload)
	log_daemon_msg "Reloading $DESC" "$NAME"
	do_reload
	log_end_msg $?
	;;
  graceful-reload)
	log_daemon_msg "Gracefully reloading $DESC" "$NAME"
	do_graceful_reload
	log_end_msg $?
	;;
  restart)
	log_daemon_msg "Restarting $DESC" "$NAME"
	do_stop
	case "$?" in
	  0|1)
		do_start
		case "$?" in
			0) log_end_msg 0 ;;
			1) log_end_msg 1 ;; # Old process is still running
			*) log_end_msg 1 ;; # Failed to start
		esac
		;;
	  *)
	  	# Failed to stop
		log_end_msg 1
		;;
	esac
	;;
  *)
	echo "Usage: $SCRIPTNAME {start|stop|status|restart|graceful-reload|reload}" >&2
	exit 3
	;;
esac

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