Golang如何创建守护进程以及平滑重启

package main

import "fmt"

import "os"

import "os/signal"

import "syscall"

func main() {

    // Go signal notification works by sending `os.Signal`

    // values on a channel. We'll create a channel to

    // receive these notifications (we'll also make one to

    // notify us when the program can exit).

    sigs := make(chan os.Signal, 1)

    done := make(chan bool, 1)

    // `signal.Notify` registers the given channel to

    // receive notifications of the specified signals.

    signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)

    // This goroutine executes a blocking receive for

    // signals. When it gets one it'll print it out

    // and then notify the program that it can finish.

    go func() {

        sig := <-sigs

        fmt.Println()

        fmt.Println(sig)

        done <- true

    }()

    // The program will wait here until it gets the

    // expected signal (as indicated by the goroutine

    // above sending a value on `done`) and then exit.

    fmt.Println("awaiting signal")

    <-done

    fmt.Println("exiting")

}