node.js init script

node-app.sh

#/bin/sh
NODE_EXEC=/usr/local/bin/node
NODE_ENV="production"
NODE_APP='app.js'
APP_DIR='/var/www/example.com';
PID_FILE=$APP_DIR/pid/app.pid
LOG_FILE=$APP_DIR/log/app.log
CONFIG_DIR=$APP_DIR/config

###############

# REDHAT chkconfig header

# chkconfig: - 58 74
# description: node-app is the script for starting a node app on boot.
### BEGIN INIT INFO
# Provides: node
# Required-Start:    $network $remote_fs $local_fs
# Required-Stop:     $network $remote_fs $local_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: start and stop node
# Description: Node process for app
### END INIT INFO


case "$1" in
    start)
        if [ -f $PID_FILE ]
        then
                echo "$PID_FILE exists, process is already running or crashed"
        else
                echo "Starting node app..."
		NODE_ENV=$NODE_ENV NODE_CONFIG_DIR=$CONFIG_DIR $NODE_EXEC $APP_DIR/$NODE_APP  1>$LOG_FILE 2>&1 &
		echo $! > $PID_FILE;
        fi
        ;;

    stop)
        if [ ! -f $PID_FILE ]
        then
                echo "$PID_FILE does not exist, process is not running"
        else
                echo "Stopping $APP_DIR/$NODE_APP ..."
		echo "Killing `cat $PID_FILE`"
		kill `cat $PID_FILE`;
		rm $PID_FILE;
                echo "Node stopped"
        fi
        ;;

	restart)
		if [ ! -f $PID_FILE ]
		then
			echo "$PID_FILE does not exist, process is not running"

		else
			echo "Restarting $APP_DIR/$NODE_APP ..."
			echo "Killing `cat $PID_FILE`"
			kill `cat $PID_FILE`;
			rm $PID_FILE;
			NODE_ENV=$NODE_ENV NODE_CONFIG_DIR=$CONFIG_DIR $NODE_EXEC $APP_DIR/$NODE_APP  1>$LOG_FILE 2>&1 &
			echo $! > $PID_FILE;
			echo "Node restarted"
		fi
		;;

	status)
        if [ -f $PID_FILE ]
        then
            PID=`cat $PID_FILE`
            if [ -z "`ps -ef | grep $PID | grep -v grep`" ]
            then
                echo "Node app stopped but pid file exists"
            else
                echo "Node app running with pid $PID"

            fi
        else
            echo "Node app stopped"
        fi
        ;;

	*)
		echo "Usage: /etc/init.d/node-app {start|stop|restart|status}"
	;;
esac