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init容器和主容器

init容器和主容器的区别

1. 初始化容器不支持 Readinessprobe，因为他们必须在pod就绪之前运行完成
2. 每个init容器必须运行成功，下一个才能够运行

# 定义两个初始化容器，完成后再运行主容器
vi pod-init.yaml 
apiVersion: v1
kind: Pod
metadata:name: myapp-podlabels:app: myapp
spec:initContainers:- name: init-myserviceimage: 172.16.80.140/busybox/busybox:1.28imagePullPolicy: IfNotPresentcommand: ['sh', '-c', "sleep 5"]- name: init-mydbimage: 172.16.80.140/busybox/busybox:1.28imagePullPolicy: IfNotPresentcommand: ['sh', '-c', "sleep 5"]    containers:- name: myapp-containerimage: 172.16.80.140/busybox/busybox:1.28command: ['sh', '-c', 'echo The app is running! && sleep 3600']

  

# 获取百度首页，挂载到init容器中，同时挂载到主容器nginx中
vi pod-init-2.yaml
apiVersion: v1
kind: Pod
metadata:name: initnginx
spec:initContainers:- name: installimage: 172.16.80.140/busybox/busybox:1.28imagePullPolicy: IfNotPresentcommand:- wget- "-O"- "/work-dir/index.html"- "https://www.baidu.com"volumeMounts:- name: workdirmountPath: /work-dircontainers:- name: nginximage: 172.16.80.140/nginx/nginx:1.26imagePullPolicy: IfNotPresentports:- containerPort: 80volumeMounts:- name: workdirmountPath: /usr/share/nginx/htmldnsPolicy: Defaultvolumes:- name: workdiremptyDir: {}