ingress/multi-cluster/mci-blue-green-cluster/ingress.yaml

apiVersion: networking.gke.io/v1
kind: MultiClusterIngress
metadata:
  name: foobar-ingress
  namespace: multi-cluster-demo
spec:
  template:
    spec:
      backend:
        serviceName: default-backend
        servicePort: 8080
      rules:
      - host: foo.example.com
        http:
          paths:
            - backend:
                serviceName: foo
                servicePort: 8080
---
apiVersion: networking.gke.io/v1
kind: MultiClusterService
metadata:
  name: foo
  namespace: multi-cluster-demo
  annotations:
    beta.cloud.google.com/backend-config: '{"ports": {"8080":"backend-health-check"}}'
spec:
  template:
    spec:
      selector:
        app: foo
      ports:
      - name: http
        protocol: TCP
        port: 8080
        targetPort: 8080
  clusters:
  - link: "us-west1-a/gke-1"
  - link: "us-west1-b/gke-3"
---
apiVersion: networking.gke.io/v1
kind: MultiClusterService
metadata:
  name: default-backend
  namespace: multi-cluster-demo
  annotations:
    beta.cloud.google.com/backend-config: '{"default": "backend-health-check"}'
spec:
  template:
    spec:
      selector:
        app: default-backend
      ports:
      - name: http
        protocol: TCP
        port: 8080
        targetPort: 8080
  clusters:
  - link: "us-west1-a/gke-1"
  - link: "us-west1-b/gke-3"
---
apiVersion: cloud.google.com/v1
kind: BackendConfig
metadata:
  name: backend-health-check
  namespace: multi-cluster-demo
spec:
  healthCheck:
    requestPath: /healthz
    port: 8080
    type: HTTP