kubernetes云平台管理实战： 故障自愈实战（四）

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