apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: example-app
  namespace: default
spec:
  components:
    - name: hello-world-server
      type: webservice
      properties:
        image: crccheck/hello-world
        port: 8000
      traits:
        - type: scaler
          properties:
            replicas: 1
    - name: data-worker
      type: worker
      properties:
        image: busybox
        cmd:
          - sleep
          - '1000000'
  policies:
    - name: example-multi-env-policy
      type: env-binding
      properties:
        envs:
          - name: test
            placement: # selecting the namespace (in local cluster) to deploy to
              namespaceSelector:
                name: test
            selector:
              components:
                - data-worker

          - name: staging
            placement: # selecting the cluster to deploy to
              clusterSelector:
                name: cluster-worker

          - name: prod
            placement: # selecting both namespace and cluster to deploy to
              clusterSelector:
                name: cluster-worker
              namespaceSelector:
                name: prod
            patch: # overlay patch on above components
              components:
                - name: hello-world-server
                  type: webservice
                  traits:
                    - type: scaler
                      properties:
                        replicas: 3

  workflow:
    steps:
      # deploy to test env
      - name: deploy-test
        type: deploy2env
        properties:
          policy: example-multi-env-policy
          env: test

      # deploy to staging env
      - name: deploy-staging
        type: deploy2env
        properties:
          policy: example-multi-env-policy
          env: staging

      # deploy to prod env
      - name: deploy-prod
        type: deploy2env
        properties:
          policy: example-multi-env-policy
          env: prod