gateway/multi-cluster/mcg-internal-blue-green/route-step-2-mirroring.yaml

kind: HTTPRoute
apiVersion: networking.x-k8s.io/v1alpha1
metadata:
  name: sample-app-route
  namespace: mcgi-bg
  labels:
    gateway: multi-cluster-gateway
spec:
  rules:
  - forwardTo:
    - backendRef: 
        group: net.gke.io
        kind: ServiceImport
        name: sample-app-blue # we're only talking to the blue cluster
      port: 8080
      weight: 100
    filters:
    - type: RequestMirror # enable traffic mirroring to the green cluster
      requestMirror:
        backendRef: 
          group: net.gke.io
          kind: ServiceImport
          name: sample-app-green
        port: 8080