One-time Delivery (Coordinate with Multi-Controllers)

1. Working with HPA, which will change the deployment replicas.
2. Working with Istio, which will change the deployment containers.
3. Other controllers…

Specified fields once apply

kind: Application
metadata:
  name: apply-once-app
  components:
    - name: hello-world
      type: webservice
      properties:
        image: oamdev/hello-world
        - type: scaler
          properties:
            replicas: 3
    - name: apply-once
      type: apply-once
      properties:
        enable: true
        rules:
            path: ["spec.replicas"]
          selector:
            resourceTypes: ["Deployment"]