关于docker容器优雅退出的问题详解

╰─➤ docker stop --help

Usage: docker stop [OPTIONS] CONTAINER [CONTAINER...]

Stop one or more running containers

Options:
 --help Print usage
 -t, --time int Seconds to wait for stop before killing it (default 10)

$ docker run --help
...
--stop-signal string   Signal to stop a container, SIGTERM by default (default "SIGTERM")
--stop-timeout int   Timeout (in seconds) to stop a container
...

package main

import (
 "fmt"
 "os"
 "os/signal"
 "syscall"
 "time"
)

func main() {
 fmt.Println("signal test")
 go func() {
 for {
  c := make(chan os.Signal, 1)
  signal.Notify(c, syscall.SIGTERM)
  s := <-c
  fmt.Println("Got signal:", s)
 }
 }()
 time.Sleep(time.Second * 100)
}

FROM golang:1.8.0
COPY main.go .
RUN go build -o signal && cp signal $GOPATH/bin
CMD signal 

docker build -t signal:latest .

docker run --name signal signal:latest

docker stop -t 10 signal

Path:/bin/sh
Args:[
 -c,
 signal
]

FROM golang:1.8.0
COPY main.go .
RUN go build -o signal && cp signal $GOPATH/bin
CMD ["signal"] # 不能写成 CMD signal, 这会直接exec，否则会以shell的方式派生子进程。