Support NativeLB option in GatewayAPI provider

Co-authored-by: Kevin Pollet <pollet.kevin@gmail.com>

pkg/provider/kubernetes/gateway/fixtures/httproute/simple_nativelb.yml

@@ -0,0 +1,51 @@
+---
+kind: GatewayClass
+apiVersion: gateway.networking.k8s.io/v1
+metadata:
+  name: my-gateway-class
+spec:
+  controllerName: traefik.io/gateway-controller
+
+---
+kind: Gateway
+apiVersion: gateway.networking.k8s.io/v1
+metadata:
+  name: my-gateway
+  namespace: default
+spec:
+  gatewayClassName: my-gateway-class
+  listeners: # Use GatewayClass defaults for listener definition.
+    - name: http
+      protocol: HTTP
+      port: 80
+      allowedRoutes:
+        kinds:
+          - kind: HTTPRoute
+            group: gateway.networking.k8s.io
+        namespaces:
+          from: Same
+
+---
+kind: HTTPRoute
+apiVersion: gateway.networking.k8s.io/v1
+metadata:
+  name: http-app-1
+  namespace: default
+spec:
+  parentRefs:
+    - name: my-gateway
+      kind: Gateway
+      group: gateway.networking.k8s.io
+  hostnames:
+    - "foo.com"
+  rules:
+    - matches:
+        - path:
+            type: Exact
+            value: /bar
+      backendRefs:
+        - name: whoami-native
+          port: 80
+          weight: 1
+          kind: Service
+          group: ""

pkg/provider/kubernetes/gateway/fixtures/services.yml

@@ -5,6 +5,7 @@ metadata:
   namespace: default
 
 spec:
+  clusterIP: 10.10.10.1
   ports:
     - name: web2
       protocol: TCP
@@ -262,6 +263,7 @@ metadata:
   namespace: default
 
 spec:
+  clusterIP: 10.10.10.1
   ports:
     - protocol: TCP
       port: 9000
@@ -424,3 +426,45 @@ spec:
       port: 80
       name: wss
       appProtocol: kubernetes.io/wss
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: whoami-native
+  namespace: default
+  annotations:
+    traefik.io/service.nativelb: "true"
+spec:
+  clusterIP: 10.10.10.1
+  ports:
+    - name: web2
+      protocol: TCP
+      port: 8000
+      targetPort: web2
+    - name: web
+      protocol: TCP
+      port: 80
+      targetPort: web
+  selector:
+    app: containous
+    task: whoami
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: whoamitcp-native
+  namespace: default
+  annotations:
+    traefik.io/service.nativelb: "true"
+
+spec:
+  clusterIP: 10.10.10.1
+  ports:
+    - protocol: TCP
+      port: 9000
+      name: tcp-1
+    - protocol: TCP
+      port: 10000
+      name: tcp-2

pkg/provider/kubernetes/gateway/fixtures/tcproute/simple_nativelb.yml

@@ -0,0 +1,46 @@
+---
+kind: GatewayClass
+apiVersion: gateway.networking.k8s.io/v1
+metadata:
+  name: my-gateway-class
+  namespace: default
+spec:
+  controllerName: traefik.io/gateway-controller
+
+---
+kind: Gateway
+apiVersion: gateway.networking.k8s.io/v1
+metadata:
+  name: my-tcp-gateway
+  namespace: default
+spec:
+  gatewayClassName: my-gateway-class
+  listeners: # Use GatewayClass defaults for listener definition.
+    - name: tcp
+      protocol: TCP
+      port: 9000
+      allowedRoutes:
+        namespaces:
+          from: Same
+        kinds:
+          - kind: TCPRoute
+            group: gateway.networking.k8s.io
+
+---
+kind: TCPRoute
+apiVersion: gateway.networking.k8s.io/v1alpha2
+metadata:
+  name: tcp-app-1
+  namespace: default
+spec:
+  parentRefs:
+    - name: my-tcp-gateway
+      kind: Gateway
+      group: gateway.networking.k8s.io
+  rules:
+    - backendRefs:
+        - name: whoamitcp-native
+          port: 9000
+          weight: 1
+          kind: Service
+          group: ""

pkg/provider/kubernetes/gateway/fixtures/tlsroute/simple_nativelb.yml

@@ -0,0 +1,60 @@
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: supersecret
+  namespace: default
+
+data:
+  tls.crt: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCi0tLS0tRU5EIENFUlRJRklDQVRFLS0tLS0=
+  tls.key: LS0tLS1CRUdJTiBQUklWQVRFIEtFWS0tLS0tCi0tLS0tRU5EIFBSSVZBVEUgS0VZLS0tLS0=
+
+---
+kind: GatewayClass
+apiVersion: gateway.networking.k8s.io/v1
+metadata:
+  name: my-gateway-class
+  namespace: default
+spec:
+  controllerName: traefik.io/gateway-controller
+
+---
+kind: Gateway
+apiVersion: gateway.networking.k8s.io/v1
+metadata:
+  name: my-tls-gateway
+  namespace: default
+spec:
+  gatewayClassName: my-gateway-class
+  listeners: # Use GatewayClass defaults for listener definition.
+    - name: tls
+      protocol: TLS
+      hostname: foo.example.com
+      port: 9000
+      tls:
+        mode: Passthrough
+      allowedRoutes:
+        kinds:
+          - kind: TLSRoute
+            group: gateway.networking.k8s.io
+        namespaces:
+          from: Same
+
+---
+kind: TLSRoute
+apiVersion: gateway.networking.k8s.io/v1alpha2
+metadata:
+  name: tls-app-1
+  namespace: default
+spec:
+  parentRefs:
+    - name: my-tls-gateway
+      kind: Gateway
+      group: gateway.networking.k8s.io
+  rules:
+    - backendRefs:
+        - name: whoamitcp-native
+          port: 9000
+          weight: 1
+          kind: Service
+          group: ""