apiVersion: gateway.networking.k8s.io/v1
kind: GatewayClass
metadata:
  name: eg
spec:
  controllerName: gateway.envoyproxy.io/gatewayclass-controller
---
apiVersion: gateway.networking.k8s.io/v1
kind: Gateway
metadata:
  name: eg
spec:
  gatewayClassName: eg
  infrastructure:
    parametersRef:
      group: gateway.envoyproxy.io
      kind: EnvoyProxy
      name: proxy-config
  listeners:
    - name: http
      protocol: HTTP
      port: 80
---
apiVersion: gateway.envoyproxy.io/v1alpha1
kind: EnvoyProxy
metadata:
  name: proxy-config
spec:
  telemetry:
    accessLog:
      settings:
        - format:
            type: JSON
            json:
              method: "%REQ(:METHOD)%"
              http.host: "%REQ(HOST)%"
              http.path: "%REQ(:PATH)%"
              http.original_host: "%REQ(X-ENVOY-ORIGINAL-HOST)%"
              http.original_path: "%REQ(X-ENVOY-ORIGINAL-PATH)%"
              "protocol": "%PROTOCOL%"
              "response_code": "%RESPONSE_CODE%"
              "response_code_details": "%RESPONSE_CODE_DETAILS%"
          sinks:
            - type: File
              file:
                path: /dev/stdout
---
apiVersion: gateway.envoyproxy.io/v1alpha1
kind: ClientTrafficPolicy
metadata:
  name: eg
spec:
  targetRefs:
    - group: gateway.networking.k8s.io
      kind: Gateway
      name: eg
  headers:
    enableEnvoyHeaders: true
---
apiVersion: gateway.envoyproxy.io/v1alpha1
kind: Backend
metadata:
  name: backend-dynamic-resolver
spec:
  type: DynamicResolver
---
apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  name: http-filter-url-rewrite
spec:
  parentRefs:
    - name: eg
  hostnames:
    - www.example.com
  rules:
    - matches:
        - path:
            value: "/get"
      filters:
        - type: URLRewrite
          urlRewrite:
            hostname: www.google.com
            path:
              type: ReplacePrefixMatch
              replacePrefixMatch: /replace
      backendRefs:
        - group: gateway.envoyproxy.io
          kind: Backend
          name: backend-dynamic-resolver

export ENVOY_SERVICE=$(kubectl get svc -n envoy-gateway-system --selector=gateway.envoyproxy.io/owning-gateway-namespace=default,gateway.envoyproxy.io/owning-gateway-name=eg -o jsonpath='{.items[0].metadata.name}')

kubectl -n envoy-gateway-system port-forward service/${ENVOY_SERVICE} 8888:80 &

curl --verbose --header "Host: www.example.com" http://localhost:8888/get

{"http.host":"www.google.com","http.original_host":null,"http.original_path":"/get","http.path":"/replace","method":"GET","protocol":"HTTP/1.1","response_code":404,"response_code_details":"via_upstream"}

{"http.host":"www.google.com","http.original_host":"www.example.com","http.original_path":"/get","http.path":"/replace","method":"GET","protocol":"HTTP/1.1","response_code":404,"response_code_details":"via_upstream"}