关于docker:94-ReplicaSet和ReplicationController

ReplicationController

新建一个pod_nginx.yml

apiVersion: v1kind: ReplicationControllermetadata:  name: nginxspec:  replicas: 3  selector:    app: nginx  template:    metadata:      name: nginx      labels:        app: nginx    spec:      containers:      - name: nginx        image: nginx        ports:          - containerPort: 80

而后运行如下

kubectl create -f pod_nginx.ymlkubectl get rc

kubectl get pods

kubectl delete pods nginx-89s9pkubectl get podsNAME READY STATUS RESTARTS AGEnginx-2mvs9 0/1 ContainerCreating 0 <invalid>nginx-89s9p 0/1 Terminating 0 9mnginx-8bjnb 1/1 Running 0 9mnginx-h49m5 1/1 Running 0 9m

当咱们删掉一个pod的时候，kube会主动帮咱们创立另一个pod，从而达到动静的均衡

# 动静批改pod数量kubectl scale rc nginx --replicas=2

ReplicaSet

新建一个pod_nginx.yml

apiVersion: apps/v1kind: ReplicaSetmetadata:  name: nginx  labels:    tier: frontendspec:  replicas: 3  selector:    matchLabels:      tier: frontend  template:    metadata:      name: nginx      labels:        tier: frontend    spec:      containers:      - name: nginx        image: nginx        ports:          - containerPort: 80

执行

# 创立kubectl create -f pod_nginx.yml# 查看kubectl get rsNAME DESIRED CURRENT READY AGEnginx 3 3 3 2m# 扩容kubectl scale rs nginx --replicas=1