pod的优雅关闭

在pod主动驱逐或者主动删除的过程中，如何实现应用的优雅的关闭，待pod处理完所有请求

apiVersion: apps/v1
kind: Deployment
metadata:
   name: gracefulshutdown-app
spec:
  replicas: 3
  selector:
     matchLabels:
           app: gracefulshutdown-app
  template:
    metadata:
       labels:
         app: gracefulshutdown-app
    spec:
      containers:
        - name: graceful-shutdown-test
          image: gracefulshutdown-app:latest
          ports:
            - containerPort: 8080
          lifecycle:
            preStop:
              exec:
                command: ["sh", "-c", "sleep 10"]  #set prestop hook
       terminationGracePeriodSeconds: 45 # terminationGracePeriodSeconds

重点在于：
lifecycle：preStop

terminationGracePeriodSeconds

terminationGracePeriodSeconds默认是30s，所以优雅停pod时间为: terminationGracePeriodSeconds=preStop+应用停止需要的时间

原本时间轴:

 

 

配置对应应用、控制器后的时间轴: