Template for init.d service management script

init.d-template.sh

#!/bin/sh

USER="root"
APPLICATION_NAME='{{application_name}}'
APP_DIR="`npm config get prefix`/lib/node_modules/${APPLICATION_NAME}"
LOG_DIR="/var/log"
LOG_FILE="${LOG_DIR}/${APPLICATION_NAME}.log"
NODE_EXEC=$(which npm)

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

### BEGIN INIT INFO
# Provides:     $APPLICATION_NAME
# Required-Start:   $remote_fs $syslog
# Required-Stop:    $remote_fs $syslog
# Default-Start:    2 3 4 5
# Default-Stop:     0 1 6
# Short-Description: start and stop $APPLICATION_NAME
# Description: $APPLICATION_NAME
### END INIT INFO

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

USAGE="Usage: $0 {start|stop|restart|status} [--force]"
FORCE_OP=false

get_pid() {
    echo $(ps -aefw | grep "node .*server.js" | grep -v " grep " | awk '{print $2}')
}

is_running() {
    ! [ -z "$(get_pid)" ]
}

start_app() {
    if [ -z "$(get_pid)" ]
        then
            mkdir -p "$LOG_DIR"
            chown $USER:$USER "$LOG_DIR"

            echo "Starting node app ..."
            echo "cd $APP_DIR && npm start 1>$LOG_FILE 2>&1 & echo \$! > /dev/null" | sudo -i -u $USER
            echo "Node app started."
    fi
}

stop_process() {
    PID=$(get_pid)
    echo "Killing process $PID"
    kill -9 $PID
}

stop_app() {
    echo "Stopping node app ..."
    if is_running
      then
        stop_process
    fi
    echo "Node app stopped."
}

status_app() {
    if is_running
    then
        PID=$(get_pid)
        echo "Node app running with pid $PID"
    else
        echo "Node app stopped."
    fi
}

case "$2" in
    --force)
        FORCE_OP=true
    ;;

    "")
    ;;

    *)
        echo $USAGE
        exit 1
    ;;
esac

case "$1" in
    start)
        start_app
    ;;

    stop)
        stop_app
    ;;

    restart)
        stop_app
        start_app
    ;;

    status)
        status_app
    ;;

    *)
        echo $USAGE
        exit 1
    ;;
esac