apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: rollout-multi-comp
  namespace: default
spec:
  components:
    - name: back-end
      externalRevision: backend-v1
      type: webservice
      properties:
        image: nginx:1.21
        port: 80
      traits:
        - type: rollout
          properties:
            targetSize: 2
            # This means to rollout two more replicas in two batches.
            rolloutBatches:
              - replicas: 1
              - replicas: 1

    - name: front-end
      externalRevision: front-end-v1
      type: webservice
      properties:
        image: node:16.7-alpine3.12
        port: 80
      traits:
        - type: rollout
          properties:
            targetSize: 4
            # This means to rollout two more replicas in two batches.
            rolloutBatches:
              - replicas: 2
              - replicas: 2

  workflow:
    steps:
     # rollout back-end component first, workflow will block until  rollout succeed
      - name: rollout-back-end
        type: rollout-wait-succeed
        properties:
          appName: rollout-multi-comp
          component: back-end

     # rollout front-end component
      - name: rollout-front-end
        type: rollout-wait-succeed
        properties:
          appName: rollout-multi-comp
          component: front-end