fix(scheme): register Istio and Gateway API source types

cmd/main.go

@@ -30,6 +30,7 @@ import (
 	// to ensure that exec-entrypoint and run can make use of them.
 	_ "k8s.io/client-go/plugin/pkg/client/auth"
 
+	istionetworkingv1 "istio.io/client-go/pkg/apis/networking/v1"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
@@ -44,6 +45,8 @@ import (
 	metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
 	"sigs.k8s.io/controller-runtime/pkg/webhook"
 	externaldnsv1alpha1 "sigs.k8s.io/external-dns/apis/v1alpha1"
+	gwapiv1 "sigs.k8s.io/gateway-api/apis/v1"
+	gwapiv1alpha2 "sigs.k8s.io/gateway-api/apis/v1alpha2"
 
 	"sigs.k8s.io/external-dns/source/annotations"
 
@@ -120,6 +123,13 @@ func init() {
 
 	utilruntime.Must(sreportalv1alpha1.AddToScheme(scheme))
 	utilruntime.Must(sreportalv1alpha2.AddToScheme(scheme))
+
+	// External source types listed by the DNS source resolvers. Without these
+	// the SourceReconciler's List fails client-side ("no kind is registered for
+	// the type ...") whenever the matching source is enabled on a DNS CR.
+	utilruntime.Must(istionetworkingv1.AddToScheme(scheme)) // Istio Gateway, VirtualService
+	utilruntime.Must(gwapiv1.Install(scheme))               // Gateway API HTTPRoute, GRPCRoute
+	utilruntime.Must(gwapiv1alpha2.Install(scheme))         // Gateway API TCPRoute, TLSRoute, UDPRoute
 	// +kubebuilder:scaffold:scheme
 }
 

cmd/scheme_test.go

@@ -0,0 +1,52 @@
+/*
+Copyright 2026.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"testing"
+
+	"sigs.k8s.io/controller-runtime/pkg/client"
+
+	"github.com/golgoth31/sreportal/internal/source/gatewaygrpcroute"
+	"github.com/golgoth31/sreportal/internal/source/gatewayhttproute"
+	"github.com/golgoth31/sreportal/internal/source/gatewaytcproute"
+	"github.com/golgoth31/sreportal/internal/source/gatewaytlsroute"
+	"github.com/golgoth31/sreportal/internal/source/gatewayudproute"
+	"github.com/golgoth31/sreportal/internal/source/istiogateway"
+	"github.com/golgoth31/sreportal/internal/source/istiovirtualservice"
+)
+
+// TestSchemeRegistersExternalSourceTypes guards against the SourceReconciler
+// failing client-side ("no kind is registered for the type ...") when a source
+// backed by an external API (Istio, Gateway API) is enabled on a DNS CR. Each
+// resolver's list type must be recognized by the manager scheme built in init().
+func TestSchemeRegistersExternalSourceTypes(t *testing.T) {
+	lists := map[string]client.ObjectList{
+		"istio-gateway":        istiogateway.NewResolver().ObjectList(),
+		"istio-virtualservice": istiovirtualservice.NewResolver().ObjectList(),
+		"gateway-httproute":    gatewayhttproute.NewResolver().ObjectList(),
+		"gateway-grpcroute":    gatewaygrpcroute.NewResolver().ObjectList(),
+		"gateway-tcproute":     gatewaytcproute.NewResolver().ObjectList(),
+		"gateway-tlsroute":     gatewaytlsroute.NewResolver().ObjectList(),
+		"gateway-udproute":     gatewayudproute.NewResolver().ObjectList(),
+	}
+	for name, list := range lists {
+		if _, _, err := scheme.ObjectKinds(list); err != nil {
+			t.Errorf("scheme does not recognize %s list type %T: %v", name, list, err)
+		}
+	}
+}