feat: enable load backend resources

internal/cmd/egctl/testdata/translate/in/backend-endpoint.yaml

@@ -0,0 +1,46 @@
+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
+  listeners:
+    - name: http
+      protocol: HTTP
+      port: 80
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: backend
+spec:
+  parentRefs:
+    - name: eg
+  hostnames:
+    - "www.example.com"
+  rules:
+    - backendRefs:
+        - group: gateway.envoyproxy.io
+          kind: Backend
+          name: backend
+      matches:
+        - path:
+            type: PathPrefix
+            value: /
+---
+apiVersion: gateway.envoyproxy.io/v1alpha1
+kind: Backend
+metadata:
+  name: backend
+spec:
+  endpoints:
+    - ip:
+        address: 0.0.0.0
+        port: 3000

internal/cmd/egctl/testdata/translate/out/backend-endpoint.all.yaml

@@ -0,0 +1,106 @@
+backends:
+- kind: Backend
+  metadata:
+    creationTimestamp: null
+    name: backend
+    namespace: envoy-gateway-system
+  spec:
+    endpoints:
+    - ip:
+        address: 0.0.0.0
+        port: 3000
+  status:
+    conditions:
+    - lastTransitionTime: null
+      message: The Backend was accepted
+      reason: Accepted
+      status: "True"
+      type: Accepted
+gatewayClass:
+  kind: GatewayClass
+  metadata:
+    creationTimestamp: null
+    name: eg
+    namespace: envoy-gateway-system
+  spec:
+    controllerName: gateway.envoyproxy.io/gatewayclass-controller
+  status:
+    conditions:
+    - lastTransitionTime: null
+      message: Valid GatewayClass
+      reason: Accepted
+      status: "True"
+      type: Accepted
+gateways:
+- kind: Gateway
+  metadata:
+    creationTimestamp: null
+    name: eg
+    namespace: envoy-gateway-system
+  spec:
+    gatewayClassName: eg
+    listeners:
+    - name: http
+      port: 80
+      protocol: HTTP
+  status:
+    listeners:
+    - attachedRoutes: 1
+      conditions:
+      - lastTransitionTime: null
+        message: Sending translated listener configuration to the data plane
+        reason: Programmed
+        status: "True"
+        type: Programmed
+      - lastTransitionTime: null
+        message: Listener has been successfully translated
+        reason: Accepted
+        status: "True"
+        type: Accepted
+      - lastTransitionTime: null
+        message: Listener references have been resolved
+        reason: ResolvedRefs
+        status: "True"
+        type: ResolvedRefs
+      name: http
+      supportedKinds:
+      - group: gateway.networking.k8s.io
+        kind: HTTPRoute
+      - group: gateway.networking.k8s.io
+        kind: GRPCRoute
+httpRoutes:
+- kind: HTTPRoute
+  metadata:
+    creationTimestamp: null
+    name: backend
+    namespace: envoy-gateway-system
+  spec:
+    hostnames:
+    - www.example.com
+    parentRefs:
+    - name: eg
+    rules:
+    - backendRefs:
+      - group: gateway.envoyproxy.io
+        kind: Backend
+        name: backend
+      matches:
+      - path:
+          type: PathPrefix
+          value: /
+  status:
+    parents:
+    - conditions:
+      - lastTransitionTime: null
+        message: Route is accepted
+        reason: Accepted
+        status: "True"
+        type: Accepted
+      - lastTransitionTime: null
+        message: Resolved all the Object references for the Route
+        reason: ResolvedRefs
+        status: "True"
+        type: ResolvedRefs
+      controllerName: gateway.envoyproxy.io/gatewayclass-controller
+      parentRef:
+        name: eg

internal/cmd/egctl/translate_test.go

@@ -287,6 +287,12 @@ func TestTranslate(t *testing.T) {
 			expect:    true,
 			extraArgs: []string{"--add-missing-resources"},
 		},
+		{
+			name:   "backend-endpoint",
+			from:   "gateway-api",
+			to:     "gateway-api",
+			expect: true,
+		},
 	}
 
 	flag.Parse()

internal/gatewayapi/resource/load.go

@@ -44,7 +44,6 @@
 
 // loadKubernetesYAMLToResources converts a Kubernetes YAML string into GatewayAPI Resources.
 // TODO: add support for kind:
-//   - Backend (gateway.envoyproxy.io/v1alpha1)
 //   - EnvoyExtensionPolicy (gateway.envoyproxy.io/v1alpha1)
 //   - HTTPRouteFilter (gateway.envoyproxy.io/v1alpha1)
 //   - BackendLPPolicy (gateway.networking.k8s.io/v1alpha2)
@@ -295,6 +294,19 @@
 				Spec: typedSpec.(egv1a1.HTTPRouteFilterSpec),
 			}
 			resources.HTTPRouteFilters = append(resources.HTTPRouteFilters, httpRouteFilter)
+		case KindBackend:
+			typedSpec := spec.Interface()
+			backend := &egv1a1.Backend{
+				TypeMeta: metav1.TypeMeta{
+					Kind: KindBackend,
+				},
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      name,
+					Namespace: namespace,
+				},
+				Spec: typedSpec.(egv1a1.BackendSpec),
+			}
+			resources.Backends = append(resources.Backends, backend)
 		}
 
 		return nil