关于第十二课 mydocker stop

[Chen-Litao]

请问一下第十二课中 // 2.发送SIGTERM信号 if err = syscall.Kill(pidInt, syscall.SIGTERM); err != nil { log.Errorf("Stop container %s error %v", containerId, err) return } syscall.SIGTERM换成syscall.SIGTERM是否更合适一点呢

[Chen-Litao]

换成syscall.SIGSTOP

[lixd]

是的，kill 有点粗暴了哈哈，我改一下子

[lixd]

看了一下代码，感觉是弄错了，我以为是直接 SIGKILL 呢, 现在用的 SIGTERM 是 ok 的。 几个 signal 的区别：

SIGKILL kills a process and cannot be caught

SIGTERM kills a process but can be caught to do a graceful exit

SIGSTOP suspends the process until you do a SIGCONT

然后 Docker 的描述

• docker stop: Stop a running container (send SIGTERM, and then SIGKILL after grace period) [...] The main process inside the container will receive SIGTERM, and after a grace period, SIGKILL. [emphasis mine]
• docker kill: Kill a running container (send SIGKILL, or specified signal) [...] The main process inside the container will be sent SIGKILL, or any signal specified with option --signal. [emphasis mine]

docker stop 就是停止容器，不是暂停容器，因此不是用的 SIGSTOP

[Chen-Litao]

好的好的，感谢回复