Pod API 的实现原理

Pod API 的实现原理

官方文档 pors https://kubernetes.io/zh/docs/concepts/workloads/pods/.

1.在集群内 创建pod

test1.yml

apiVersion: v1
kind: Pod
metadata:
  name: two-containers
spec:
  restartPolicy: Never
  volumes:
  - name: shared-data
    hostPath:
      path: /data
  containers:
  - name: nginx-container
    image: nginx
    volumeMounts:
    - name: shared-data
      mountPath: /usr/share/nginx/html
  - name: debian-container
    image: debian
    volumeMounts:
    - name: shared-data
      mountPath: /pod-data
    command: ["/bin/sh"]
    args: ["-c", "echo Hello from the debian container > /pod-data/index.html"]

2.执行yaml文件

kubectl apply -f test1.yml

3.查看当前默认 pods

[root@k8s-master yaml]# kubectl get pods
NAME                                READY   STATUS              RESTARTS   AGE
two-containers                      0/2     ContainerCreating   0          36s

[root@k8s-master yaml]# kubectl get pods
NAME             READY   STATUS     RESTARTS   AGE
two-containers   1/2     NotReady   0          14m

4.查看创建容器的位置

[root@k8s-master yaml]# kubectl describe pods two-containers
Name:         two-containers
Namespace:    default
Priority:     0
Node:         k8s-node2/10.9.29.107            #容器的位置
Start Time:   Wed, 17 Mar 2021 22:17:16 -0400
...

5.查看容器挂载的内容

到对应机器上查看是否挂载

[root@k8s-node2 ~]# cat /data/index.html 
Hello from the debian container