如何在kubernetes作业中创建init容器？

Question

在job.yaml下面用于创建作业。未创建初始化容器。

[root@app]#kubectl版本客户端版本：version.info{Major：“1”,Minor：“15”,GitVersion：“v1.15.5”,GitCommit：“”,GitTreeState：“Clean”,BuildDate：“2019-10-15T19:16:51Z”,GoVersion：“Go1.12.10”,编译器：“GC”,平台：“Linux/AMD64”}服务器版本：version.info{Major：“1”,Minor：“15”,GitVersion：“v1.15.5”,GitCommit：“”,GitTreeState：“Clean”,BuildDate：“2019-10-15T19:07:57Z”,GoVersion：“Go1.12.10”,Complier Lere：“GC”，平台：“Linux/AMD64”}

apiVersion: batch/v1
kind: Job
metadata:
  name: pi
spec:
  template:
    metadata:
      name: pi
      annotations:
        pod.beta.kubernetes.io/init-containers: '[
          {
            "name": "init-myservice",
            "image": "busybox",
            "command": ["sh", "-c", "until nslookup myservice; do echo waiting for myservice; sleep 2; done;"]
          },
          {
            "name": "init-mydb",
            "image": "busybox",
            "command": ["sh", "-c", "until nslookup mydb; do echo waiting for mydb; sleep 2; done;"]
          }
        ]'
    spec:
      containers:
      - name: pi
        image: perl
        command: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"]
      restartPolicy: Never

Answer 1

InitContainers在pod规范中设置。而不是元数据。Pod规范对于作业、部署或创建Pod的任何内容都是相同的。

apiVersion: batch/v1
kind: Job
metadata:
  name: pi
spec:
  template:
    metadata:
      name: pi
    spec:
      containers:
      - name: pi
        image: perl
        command: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"]
      initContainers:
      - name: init-myservice
        image: busybox:1.28
        command: ["sh", "-c", "until nslookup myservice; do echo waiting for myservice; sleep 2; done;"]
      - name: init-mydb
        image: busybox:1.28
        command: ["sh", "-c", "until nslookup mydb; do echo waiting for mydb; sleep 2; done;"]
      restartPolicy: Never