```
apiVersion: apps/v1 # kubectl explian rs查看
kind: ReplicaSet
metadata:
  name: myapp
  namespace: default

spec:
  replicas: 2 # 副本数
  selector: # 选择标签匹配的容器[与template中的匹配]
    matchLabels:
      app: myapp
      release: v1
  
  template:
    metadata:
      name: app-demo
      labels:
        app:myapp
        release: v1
    spec:
      container:
        name: myapp-ct
        image: xxx/myapp.v1
        ports:
          name: myapp-http
          containerPort:80
```