Example Deployment YAML for Multi-cluster Ingress with FrontendConfig and BackendConfig

Multi-clusterIngress.yaml

# Application Deployment
apiVersion: apps/v1
kind: Deployment
metadata:
  name: web-app
  namespace: default
spec:
  replicas: 2
  selector:
    matchLabels:
      app: web
  template:
    metadata:
      labels:
        app: web
    spec:
      containers:
      - name: web
        image: nginx
        ports:
        - containerPort: 80

---

# Cluster-local Service
apiVersion: v1
kind: Service
metadata:
  name: web-service
  namespace: default
spec:
  selector:
    app: web
  ports:
  - protocol: TCP
    port: 80
    targetPort: 80

---

# MultiClusterService for cross-cluster service discovery
apiVersion: networking.gke.io/v1
kind: MultiClusterService
metadata:
  name: web-mcs
  namespace: default
spec:
  template:
    spec:
      selector:
        app: web
      ports:
      - name: http
        protocol: TCP
        port: 80
        targetPort: 80
  clusters:
  - linkName: cluster1
  - linkName: cluster2

---

# MultiClusterIngress to expose the MultiClusterService externally
apiVersion: networking.gke.io/v1
kind: MultiClusterIngress
metadata:
  name: web-mci
  namespace: default
spec:
  template:
    spec:
      frontendConfig:
        name: web-frontendconfig
      rules:
      - host: web.example.com
        http:
          paths:
          - path: /*
            pathType: ImplementationSpecific
            backend:
              service:
                name: web-mcs
                port:
                  number: 80

---

# FrontendConfig for custom frontend settings
apiVersion: networking.gke.io/v1beta1
kind: FrontendConfig
metadata:
  name: web-frontendconfig
  namespace: default
spec:
  sslPolicy: custom-ssl-policy
  redirectToHttps:
    enabled: true

---

# BackendConfig for custom backend settings
apiVersion: cloud.google.com/v1
kind: BackendConfig
metadata:
  name: web-backendconfig
  namespace: default
spec:
  healthCheck:
    checkIntervalSec: 30
    timeoutSec: 5
    healthyThreshold: 2
    unhealthyThreshold: 3
    requestPath: /healthz
  sessionAffinity:
    affinityType: CLIENT_IP