Example how make unkillable golang app

main.go

package main

import (
	"fmt"
	"time"
)

var chExit chan struct{}
const TimeSleepRecover = 10

func main() {
	go Run()
	select {}
}

func Run() {
	chExit = make(chan struct{})
	defer Recover(TimeSleepRecover, Run, chExit)
	go R1()
	go R2()
}

func R1() {
	for {
		select {
		default:
			time.Sleep(2 * time.Second)
			fmt.Println("R1")
		case <-chExit:
			return
		}
	}
}

func R2() {
	defer Recover(TimeSleepRecover, Run, chExit)
	for {
		select {
		default:
			time.Sleep(7 * time.Second)
			fmt.Println("R2")
			panic("123")
		case <-chExit:
			return
		}
	}
}

func Recover(d time.Duration, f func(), chExit chan struct{}) {
	if r := recover(); r != nil {
		fmt.Printf("Recover error %+v Stop goroutines\n", r)
		close(chExit)
		fmt.Printf("Sleep %d\n", d)
		time.Sleep(d * time.Second)
		f()
	}
}