容器運行的流程：kubectl指令->api-server->etcd->kublet->CRI（容器運行接口）->容器生命周期

init C:ini-pod.yml
apiVersion: v1
kind: Pod
metadata:
name: myapp-pod
labels:
app: myapp
spec:
containers:

• name: myapp-container
  image: 192.168.68.253:8253/library/busybox
  command: ['sh','-c','echo The app is running! && sleep 3600']
  initContainers:
• name: init-myservice
  image: 192.168.68.253:8253/library/busybox
  command: ['sh','-c','until nslookup myservice; do echo waiting for myservice; sleep 2;done;']
• name: init-mydb
  image: 192.168.68.253:8253/library/busybox
  command: ['sh','-c','until nslookup mydb; do echo waiting for mydb; sleep 2; done;']

kind: Service
apiVersion: v1
metadata:
name: myservice
spec:
ports:

• protocol: TCP
  port: 80
  targetPort: 9376

kind: Service
apiVersion: v1
metadata:
name: mydb
spec:
ports:

• protocol: TCP
  port: 80
  targetPort: 9377

測試init失敗了，卡在myservice,獲取到了myservice的ip,但是沒有退出循環