Gateway API HTTP example listener matching

README.md

Steps:

kubectl apply -f cafe.yaml
kubectl apply -f gateway.yaml
kubectl apply -f routes.yaml

GW_IP=XXX.YYY.ZZZ.III # public IP of the data plane
GW_PORT=<port number> # public port

curl --resolve cafe.example.com:$GW_PORT:$GW_IP http://cafe.example.com:$GW_PORT/coffee
curl --resolve cafe.example.com:$GW_PORT:$GW_IP http://cafe.example.com:$GW_PORT/tea

cafe.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: coffee
spec:
  replicas: 1
  selector:
    matchLabels:
      app: coffee
  template:
    metadata:
      labels:
        app: coffee
    spec:
      containers:
      - name: coffee
        image: nginxdemos/nginx-hello:plain-text
        ports:
        - containerPort: 8080
---
apiVersion: v1
kind: Service
metadata:
  name: coffee
spec:
  ports:
  - port: 80
    targetPort: 8080
    protocol: TCP
    name: http
  selector:
    app: coffee
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: tea
spec:
  replicas: 1
  selector:
    matchLabels:
      app: tea
  template:
    metadata:
      labels:
        app: tea
    spec:
      containers:
      - name: tea
        image: nginxdemos/nginx-hello:plain-text
        ports:
        - containerPort: 8080
---
apiVersion: v1
kind: Service
metadata:
  name: tea
spec:
  ports:
  - port: 80
    targetPort: 8080
    protocol: TCP
    name: http
  selector:
    app: tea

gateway.yaml

apiVersion: gateway.networking.k8s.io/v1beta1
kind: Gateway
metadata:
  name: gateway
spec:
  gatewayClassName: gke-l7-global-external-managed
  # gatewayClassName: eg 
  # gatewayClassName: nginx
  # gatewayClassName: contour
  listeners:
  - name: example
    port: 80
    hostname: "*.example.com"
    protocol: HTTP
  - name: cafe
    port: 80
    protocol: HTTP
    hostname: "cafe.example.com"

routes.yaml

apiVersion: gateway.networking.k8s.io/v1beta1
kind: HTTPRoute
metadata:
  name: coffee
spec:
  parentRefs:
  - name: gateway
    sectionName: example
  hostnames:
  - "cafe.example.com"
  rules:
  - matches:
    - path:
        type: PathPrefix
        value: /coffee
    backendRefs:
    - name: coffee
      port: 80
---
apiVersion: gateway.networking.k8s.io/v1beta1
kind: HTTPRoute
metadata:
  name: tea
spec:
  parentRefs:
  - name: gateway
    sectionName: cafe
  hostnames:
  - "*.example.com"
  rules:
  - matches:
    - path:
        type: PathPrefix
        value: /tea
    backendRefs:
    - name: tea
      port: 80