kubernetes云平台管理实战： 故障自愈实战（四）

时间：2023-12-26 13:53:43

一、创建实验文件

[root@k8s-master ~]# cat myweb-rc.yml

apiVersion: v1

kind: ReplicationController

metadata:

  name: myweb

spec:

  replicas: 3

  selector:

    app: myweb

  template:

    metadata:

      labels:

        app: myweb

    spec:

      containers:

      - name: nginx

        image: 10.0.128.0:5000/nginx:latest

        ports:

        - containerPort: 80

二、故障自愈实战

1、创建前pod状态查看

[root@k8s-master ~]# kubectl get pod -o wide

NAME          READY     STATUS    RESTARTS   AGE       IP            NODE

nginx         1/1       Running   0          1h        172.16.10.2   k8s-node1

nginx2        1/1       Running   0          19m       172.16.48.2   k8s-node2

2、创建rc并查看状态

[root@k8s-master ~]# kubectl create -f myweb-rc.yml

replicationcontroller "myweb" created

[root@k8s-master ~]# kubectl get pod -o wide

NAME          READY     STATUS    RESTARTS   AGE       IP            NODE

myweb-9rmf4   1/1       Running   0          30s       172.16.10.3   k8s-node1

myweb-stgrj   1/1       Running   0          30s       172.16.48.4   k8s-node2

myweb-vhnph   1/1       Running   0          30s       172.16.48.3   k8s-node2

nginx         1/1       Running   0          1h        172.16.10.2   k8s-node1

nginx2        1/1       Running   0          19m       172.16.48.2   k8s-node2

3、故障自愈（多次删除自动新启动容器）

[root@k8s-master ~]# kubectl delete pods myweb-9rmf4

pod "myweb-9rmf4" deleted

[root@k8s-master ~]# kubectl get pod -o wide

NAME          READY     STATUS              RESTARTS   AGE       IP            NODE

myweb-0b1wf   0/1       ContainerCreating   0          3s        <none>        k8s-node1

myweb-stgrj   1/1       Running             0          1m        172.16.48.4   k8s-node2

myweb-vhnph   1/1       Running             0          1m        172.16.48.3   k8s-node2

nginx         1/1       Running             0          1h        172.16.10.2   k8s-node1

nginx2        1/1       Running             0          20m       172.16.48.2   k8s-node2

[root@k8s-master ~]# kubectl delete pods myweb-stgrj

pod "myweb-stgrj" deleted

[root@k8s-master ~]# kubectl get pod

NAME          READY     STATUS    RESTARTS   AGE

myweb-0b1wf   1/1       Running   0          53s

myweb-nwzfp   1/1       Running   0          6s

myweb-vhnph   1/1       Running   0          2m

nginx         1/1       Running   0          1h

nginx2        1/1       Running   0          21m

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