為了確保程式死掉後會自動重新執行，所以先安裝這套 forever

用途如其名，就是讓你的程式永遠執行

npm install forever -g

forever start index.js

接下來，就是要寫一個 linux service 的 script，然後執行 forever 讓你的服務自動啟動，而且萬一掛調會自動跑起來

參考 https://github.com/foreverjs/forever 的作法

把檔案改成你要的服務名稱，並放到 /etc/init.d 即可 

裡面的參數要自己改喔!~~

 

#!/bin/sh

### BEGIN INIT INFO
# Provides:          
# Required-Start:    my-service
# Required-Stop:     my-service
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: My Linux Service
### END INIT INFO

set -e

SERVICE_NAME=`basename $0`
PIDFILE=/var/run/myserv.pid
LOGPATH="/var/log/${SERVICE_NAME}"
FOREVER_BIN=`which forever`
APP_PATH="/var/share/work-js/app.js"

case $1 in
	start)
		if [ -e "${PIDFILE}" ]; then
			PID=`cat ${PIDFILE}`
			echo "Service is running already. (PID=${PID})"
			exit 1
		fi
		if [ ! -d "${LOGPATH}" ]; then
			mkdir -p "${LOGPATH}"
		fi
		PID=`ps aux | grep ${APP_PATH} | head -n1 | awk '{print $2}'`
		${FOREVER_BIN} start ${APP_PATH} -l "${LOGPATH}/service.log" -o "${LOGPATH}/out.log" -e "${LOGPATH}/error.log" > "${LOGPATH}/start.log"
		rm -rf ${PIDFILE}
		echo "${PID}" > ${PIDFILE}
		echo "Service ${SERVICE_NAME} start. PID=${PID}"
		;;
	stop)
		if [ ! -e "${PIDFILE}" ]; then
			echo "Service is not running."
		else
			PID=`cat ${PIDFILE}`
			kill ${PID} || true
			rm -rf ${PIDFILE}
			echo "Service ${SERVICE_NAME} stop. PID=${PID}"
		fi
		;;
	restart)
		$0 stop
		sleep 1
		$0 start
		;;
	status)
		if [ -e "${PIDFILE}" ]; then
			PID=`cat ${PIDFILE}`
			echo "Service is running. (PID=${PID})"
		else
				echo "Service is not running."
		fi
		;;
	*)
		echo "Usage: ${0} {start|stop|restart|status}"
		exit 1
		;;
esac

因為 log 太多會爆炸，所以最好加入 logrotate。

先

vi /etc/logrotate.d/forever

並放入以下內容

/root/.forever/*.log {
    daily
    create 0644 root root
    rotate 12
    delaycompress
    missingok
    notifempty
    sharedscripts
    delaycompress
    postrotate
        forever restartall
    endscript
}

 

最後可以用 

cd /etc/logrotate.d
logrotate --force forever