[root@v75 yml]# cat rc1.yaml 
apiVersion: v1
kind: ReplicationController
metadata:
  name: my-nginx
spec:
  replicas: 2
  selector:
    app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80 

 

按照replicas: 2指定的数量,启动2个pod

 

 

手动删除一个pod,马上有一个新的pod被创建,与replicas: 2指定的数量保持一致

 

扩容Pod副本数量:

[root@v76 yml]# kubectl scale replicationcontroller my-nginx --replicas=3
replicationcontroller/my-nginx scaled

创建的过程:

减少Pod副本的数量:

[root@v76 yml]# kubectl scale replicationcontroller my-nginx --replicas=1
replicationcontroller/my-nginx scaled