当运行preStop命令时，Kubernetes状态。

I'm using preStop command to gracefully shutdown my server application when I delete a pod. What is the state of the pod/ container when it runs preStop command? For example, does it stop the network interfaces before running the preStop command?

当我删除一个pod时，我使用preStop命令来优雅地关闭我的服务器应用程序。在运行preStop命令时，pod/ container的状态是什么?例如，在运行preStop命令之前，它是否停止网络接口?

lifecycle:
    preStop:
      exec:                
        command: ["kill", "-SIGTERM", "`pidof java`"]

2 个解决方案

#1

The state of the pod doesn't change while preStop hooks are run -- the preStop hook is run in the container, and then the container is stopped.

在运行preStop钩子时，pod的状态不会改变——preStop钩子在容器中运行，然后容器被停止。

#2

When a pod should be terminated, Kubernetes does the following:

当一个豆荚被终止时，Kubernetes会做如下的事情:

Switch the Pod to the Terminating state
将Pod切换到终止状态。
Invoke the preStop hook (if any)
调用preStop钩子(如果有的话)
Once the preStop hook ends, it sends a SIGTERM to the main process in the container (PID 1)
一旦preStop钩子结束，它就会向容器中的主进程发送一个SIGTERM (PID 1)
If the container doesn't terminate with the termination grace period (30 seconds by default - starts counting at point #1), Kubernetes will send a SIGKILL to the container's main process to violently stop it
如果容器没有终止使用终止grace周期(默认情况下是30秒)，Kubernetes将发送一个SIGKILL到容器的主进程以阻止它。

More details here: Graceful shutdown of Kubernetes Pods

更多细节:Kubernetes pod的优雅关闭。

#1