为什么kill -15不能正常终止我的Golang gRPC服务? [英] Why kill -15 does not gracefully kill my Golang gRPC service?

问题描述

我已经使用信号处理程序来处理 SIGTERM 和 SIGINT 信号.当grpc服务器启动并运行时，我发出 sudo kill -15 [PID] 命令，但看不到正常的关机日志报告，并且得到:

I have used signal handler to handle SIGTERM, SIGINT signals. When grpc server is up and running I issue sudo kill -15 [PID] command and I don’t see my graceful shutdown log reports and also I get:

[1]    41983 terminated  go run mypkg/main.go

现在，当我使用netstat时，它报告端口号50051已打开，并且由于端口号繁忙而无法运行服务器.

Now when I use netstat it reports that port number 50051 is open and I cannot run my server as the port number is busy.

我做了什么:

func main() {
    flag.Parse()
    fmt.Printf("Starting up server on 0.0.0.0:%v...\n", *port)
    server := NewServer(fmt.Sprintf("0.0.0.0:%d", *port))
    wg := sync.WaitGroup{}
    wg.Add(1)
    go func() {
        server.Run()
        wg.Done()
    }()
    // Signal handling and graceful shutdown of gRPC server
    signalChan := make(chan os.Signal, 1)
    signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)
    <-signalChan
    server.Stop()
    wg.Wait()
}

server.Stop()函数用于停止grpc服务器 grpcServer.GracefulStop()，并记录一些数据.当我发出 CTRL + C 时，一切正常.为什么在 sudo kill -15 上出现此行为?

server.Stop() function is used to stop the grpc server, grpcServer.GracefulStop(), and log some data. When I issue CTRL+C everything works as expected. Why on sudo kill -15 I this behavior?

推荐答案

由于将来的读者也可能遇到我的问题，因此我尝试根据用户评论回答自己的问题.

As future readers might also have my problem I tried to answer my own question based on user comments.

彼得:

不要使用go run.这种方式的信号转发可能不可靠.可以使用go build或go install代替，或者至少不要杀死-15 go进程，而要杀死已构建的二进制文件(可能在/tmp中).

Don't use go run. Signal forwarding may be unreliable this way. Use go build or go install instead, or at the very least don't kill -15 the go process, but the binary that has been built (probably something in /tmp).

JimB:

我知道我们每天要说100次，但不要使用go run(至少如果您不了解它在做什么).当您从终端上按ctrl + c时，它将向整个进程组发送信号，而您并不需要执行kill.

I know we say this 100 times a day, but do not use go run (at least if you don't understand what it's doing). When you ctrl+c from the terminal, it sends signal the the entire process group, which you are not doing with kill.

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