apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: workflow-demo
  namespace: default
spec:
  components:
    - name: nginx-server
      type: webservice
      properties:
        image: nginx:1.21
        port: 80

  policies:
    - name: patch
      type: env-binding
      properties:
        envs:
          - name: prod
            patch:
              components:
                - name: nginx-server
                  type: webservice
                  properties:
                    image: nginx:1.20
                    port: 80
            placement:
              clusterSelector:
                labels:
                  purpose: test

  workflow:
    steps:
      - name: deploy-server
        type: deploy2cluster
        properties:
          env:       prod
          policy:    patch
          component: nginx-server