kubernetes Pod initContainers

Pod initContainers

1. Pod的初始化容器和应用程序容器共享一个Volume，

2. 进程间通信，一个pod包含多个container，如果有启动顺序，需要使用initcontainer init

3. nginx pod 反向代理 java服务，如果java没有启动，需要制定

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginxedi
  namespace: senyint
spec:
  selector:
    matchLabels:
      app: nginxedi
  replicas: 1
  template:
    metadata:
      labels:
        app: nginxedi
    spec:
      containers:
      - name: nginxedi
        image: 172.16.230.29/senyint/nginxedi:20200407153739
        resources:
          limits:
            cpu: 1000m
            memory: 4096Mi
          requests:
            cpu: 100m
            memory: 1024Mi
        ports:
        - containerPort: 80
          name: httpport
      initContainers:
      - name: wait-hierestserver
        image: busybox
        command: ['sh', '-c', 'until nslookup hierestserver; do echo waiting for myservice; sleep 2; done;']
      - name: wait-webadmin
        image: busybox
        command: ['sh', '-c', 'until nslookup webadmin; do echo waiting for myservice; sleep 2; done;']
      - name: wait-oauthserver
        image: busybox
        command: ['sh', '-c', 'until nslookup oauthserver; do echo waiting for myservice; sleep 2; done;']