如何自动重启Go Web服务器（如果已停止）

Question

I tried to apply a mechanism that allow the go web server to be automatically restarted when it's stopped.

The way I do it, by putting the server.ListenAndServe() inside an infinite loop. Since the .ListenAndServe() is blocking, I felt it's ok to do that. Here are the full code:

func main() {
    // ...

    isStarted := false
    for true {
        if isStarted {
            fmt.Println("===================================== RESTARTING WEB SERVER")
        }

        log.Println(server.ListenAndServe())
        isStarted = true

        time.Sleep(1 * time.Second)
    }
}

When I run the app, what happen is quite different than what I expected. The web server won't start.

Am I doing it wrong? or is there any better and correct way? Thank you in advance

===================================== RESTARTING WEB SERVER
2019/03/13 10:01:03 http: Server closed
===================================== RESTARTING WEB SERVER
2019/03/13 10:01:04 http: Server closed
===================================== RESTARTING WEB SERVER
2019/03/13 10:01:05 http: Server closed
===================================== RESTARTING WEB SERVER
2019/03/13 10:01:06 http: Server closed
===================================== RESTARTING WEB SERVER
2019/03/13 10:01:07 http: Server closed
===================================== RESTARTING WEB SERVER
2019/03/13 10:01:08 http: Server closed
===================================== RESTARTING WEB SERVER
2019/03/13 10:01:09 http: Server closed
===================================== RESTARTING WEB SERVER
2019/03/13 10:01:10 http: Server closed
===================================== RESTARTING WEB SERVER
2019/03/13 10:01:11 http: Server closed
===================================== RESTARTING WEB SERVER
2019/03/13 10:01:12 http: Server closed
===================================== RESTARTING WEB SERVER
2019/03/13 10:01:13 http: Server closed
===================================== RESTARTING WEB SERVER
2019/03/13 10:01:14 http: Server closed

Answer 1

You need a process control system. That allows you to run and control a number of processes.

Ex: Systemd, Supervisord

Supervisord is a good option.

Read the documentation on http://supervisord.org/