Node Server Script

server.sh

#!/bin/sh

# Based On: https://github.com/chovy/node-startup/blob/master/init.d/node-app

# strict
set -e

NODE_ENV="development"
NODE_APP='app.js'
APP_DIR='.';
PID_DIR=$APP_DIR/pid
PID_FILE=$PID_DIR/app.pid
LOG_DIR=$APP_DIR/log
LOG_FILE=$LOG_DIR/app.log
CONFIG_DIR=$APP_DIR/config
PORT=3000
NODE_EXEC=`which node`
NPM_EXEC=`which npm`

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

start_app (){
    if [ -f $PID_FILE ]
    then
        echo "$PID_FILE exists, process is already running or crashed"
    else
        echo "Starting node app..."
        if [ ! -d $PID_DIR ]; then
            mkdir $PID_DIR
        fi
        if [ ! -d $LOG_DIR ]; then
            mkdir $LOG_DIR
        fi
        if [ ! -d node_modules ]; then
            $NPM_EXEC install
        fi
        PORT=$PORT 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_app (){
    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 -f $PID_FILE;
        echo "Node stopped"
    fi
}

case "$1" in
    start)
        start_app
    ;;

    stop)
        stop_app
    ;;

    restart)
        stop_app
        start_app
    ;;

    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: server.sh {start|stop|restart|status}"
    ;;
esac