+ rs replicaSet kubectl explain rs 模板中定义的标签一定要符合标签选择器定义的 rs-demo.yaml ``` apiVersion: apps/v1 kind: ReplicaSet metadata: name: myapp namespace: default spec: replicas: 2 selector: matchLabels: app: myapp release: canary template: metadata: name: myapp-pod labels: app: myapp release: canary environment: qa spec: container - name: myapp-container image: ikubernetes/myapp:v1 ports: - name: http containerPort: 80 ```