Kubernetes Gateway API

    1. Install the Gateway API CRDs:

    2. Install Istio, or reconfigure an existing installation to enable the Gateway API controller:

    Configuring a Gateway

    See the documentation for information about the APIs.

    1. Deploy a test application:

    2. Deploy the Gateway API configuration:

      1. $ kubectl apply -f - <<EOF
      2. apiVersion: networking.x-k8s.io/v1alpha1
      3. kind: GatewayClass
      4. metadata:
      5.   name: istio
      6. spec:
      7.   controller: istio.io/gateway-controller
      8. ---
      9. apiVersion: networking.x-k8s.io/v1alpha1
      10. kind: Gateway
      11. metadata:
      12.   name: gateway
      13.   namespace: istio-system
      14.   gatewayClassName: istio
      15.   listeners:
      16.   - hostname: "*"
      17.     port: 80
      19.     routes:
      20.       namespaces:
      21.         from: All
      22.       selector:
      23.         matchLabels:
      24.           selected: "yes"
      25.       kind: HTTPRoute
      26. ---
      27. apiVersion: networking.x-k8s.io/v1alpha1
      28. kind: HTTPRoute
      29. metadata:
      30.   name: http
      31.   namespace: default
      32.   labels:
      33.     selected: "yes"
      34. spec:
      35.     allow: All
      37.   rules:
      38.   - matches:
      39.     - path:
      40.         type: Prefix
      41.         value: /get
      42.     filters:
      43.     - type: RequestHeaderModifier
      44.       requestHeaderModifier:
      45.         add:
      46.           my-added-header: added-value
      47.     forwardTo:
      48.     - serviceName: httpbin
      49.       port: 8000
      50. EOF

    3. Access the httpbin service using curl:

    4. Access any other URL that has not been explicitly exposed. You should see an HTTP 404 error:

      1. $ curl -s -I -HHost:httpbin.example.com "http://$INGRESS_HOST:$INGRESS_PORT/headers"
      2. HTTP/1.1 404 Not Found