K8S学习之基础十一：k8s中容器钩子

容器钩子

容器钩子分为post-start和pre-stop

post-start：容器启动后执行的命令

pre-stop：容器关闭前执行的命令，可用于优雅关闭

# 分别定义两个钩子，启动pod后更新index.html，关闭pod前正常关闭服务

vi post-pre.yaml 
apiVersion: v1
kind: Pod
metadata:
  name: life-demo
spec:
  containers:
  - name: lifecycle-demo-container
    image: 172.16.80.140/nginx/nginx:1.26
    imagePullPolicy: IfNotPresent
    lifecycle:
      postStart:
         exec:
           command: ["/bin/sh", "-c","echo 'lifecycle post-start' > /usr/share/nginx/html/index.html"]
      preStop:
         exec:
           command:
           - "/bin/sh"
           - "-c"
           - "nginx -s stop"

# 上图可以看出，nginx在启动之前，就被post-start改写了index.html文件