Add new controller with gateway Api support

PROJECT

@@ -29,4 +29,9 @@ resources:
   kind: TechnitiumAuthority
   path: git.mayers.cloud/superflo22/split-horizon-operator/api/v1alpha1
   version: v1alpha1
+- controller: true
+  domain: mayers.cloud
+  group: dns
+  kind: ExternalDNSWatcher
+  version: v1alpha1
 version: "3"

cmd/main.go

@@ -34,6 +34,7 @@ import (
 	"sigs.k8s.io/controller-runtime/pkg/metrics/filters"
 	metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
 	"sigs.k8s.io/controller-runtime/pkg/webhook"
+	gatewayv1 "sigs.k8s.io/gateway-api/apis/v1"
 
 	dnsv1alpha1 "git.mayers.cloud/superflo22/split-horizon-operator/api/v1alpha1"
 	"git.mayers.cloud/superflo22/split-horizon-operator/internal/controller"
@@ -49,6 +50,8 @@ func init() {
 	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
 
 	utilruntime.Must(dnsv1alpha1.AddToScheme(scheme))
+	utilruntime.Must(gatewayv1.AddToScheme(scheme))
+
 	// +kubebuilder:scaffold:scheme
 }
 
@@ -158,6 +161,13 @@ func main() {
 		setupLog.Error(err, "unable to create controller", "controller", "TechnitiumAuthority")
 		os.Exit(1)
 	}
+	if err = (&controller.ExternalDNSWatcherReconciler{
+		Client: mgr.GetClient(),
+		Scheme: mgr.GetScheme(),
+	}).SetupWithManager(mgr); err != nil {
+		setupLog.Error(err, "unable to create controller", "controller", "ExternalDNSWatcher")
+		os.Exit(1)
+	}
 	// +kubebuilder:scaffold:builder
 
 	if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {

config/samples/kustomization.yaml

@@ -2,4 +2,5 @@
 resources:
 - dns_v1alpha1_technitiumrecord.yaml
 - dns_v1alpha1_technitiumauthority.yaml
+- dns_v1alpha1_externaldnswatcher.yaml
 # +kubebuilder:scaffold:manifestskustomizesamples

go.mod

@@ -10,6 +10,7 @@ require (
 	k8s.io/apimachinery v0.32.3
 	k8s.io/client-go v0.32.3
 	sigs.k8s.io/controller-runtime v0.20.4
+	sigs.k8s.io/gateway-api v1.2.1
 )
 
 require (

go.sum

@@ -19,8 +19,8 @@ github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/emicklei/go-restful/v3 v3.12.2 h1:DhwDP0vY3k8ZzE0RunuJy8GhNpPL6zqLkDf9B/a0/xU=
 github.com/emicklei/go-restful/v3 v3.12.2/go.mod h1:6n3XBCmQQb25CM2LCACGz8ukIrRry+4bhvbpWn3mrbc=
-github.com/evanphx/json-patch v0.5.2 h1:xVCHIVMUu1wtM/VkR9jVZ45N3FhZfYMMYGorLCR8P3k=
+github.com/evanphx/json-patch v5.7.0+incompatible h1:vgGkfT/9f8zE6tvSCe74nfpAVDQ2tG6yudJd8LBksgI=
-github.com/evanphx/json-patch v0.5.2/go.mod h1:ZWS5hhDbVDyob71nXKNL0+PWn6ToqBHMikGIFbs31qQ=
+github.com/evanphx/json-patch v5.7.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk=
 github.com/evanphx/json-patch/v5 v5.9.11 h1:/8HVnzMq13/3x9TPvjG08wUGqBTmZBsCWzjTM0wiaDU=
 github.com/evanphx/json-patch/v5 v5.9.11/go.mod h1:3j+LviiESTElxA4p3EMKAB9HXj3/XEtnUf6OZxqIQTM=
 github.com/felixge/httpsnoop v1.0.4 h1:NFTV2Zj1bL4mc9sqWACXbQFVBBg2W3GPvqp8/ESS2Wg=
@@ -245,6 +245,8 @@ sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.32.0 h1:XotDXzqvJ8Nx5
 sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.32.0/go.mod h1:Ve9uj1L+deCXFrPOk1LpFXqTg7LCFzFso6PA48q/XZw=
 sigs.k8s.io/controller-runtime v0.20.4 h1:X3c+Odnxz+iPTRobG4tp092+CvBU9UK0t/bRf+n0DGU=
 sigs.k8s.io/controller-runtime v0.20.4/go.mod h1:xg2XB0K5ShQzAgsoujxuKN4LNXR2LfwwHsPj7Iaw+XY=
+sigs.k8s.io/gateway-api v1.2.1 h1:fZZ/+RyRb+Y5tGkwxFKuYuSRQHu9dZtbjenblleOLHM=
+sigs.k8s.io/gateway-api v1.2.1/go.mod h1:EpNfEXNjiYfUJypf0eZ0P5iXA9ekSGWaS1WgPaM42X0=
 sigs.k8s.io/json v0.0.0-20241014173422-cfa47c3a1cc8 h1:gBQPwqORJ8d8/YNZWEjoZs7npUVDpVXUUOFfW6CgAqE=
 sigs.k8s.io/json v0.0.0-20241014173422-cfa47c3a1cc8/go.mod h1:mdzfpAEoE6DHQEN0uh9ZbOCuHbLK5wOm7dK4ctXE9Tg=
 sigs.k8s.io/randfill v0.0.0-20250304075658-069ef1bbf016/go.mod h1:XeLlZ/jmk4i1HRopwe7/aU3H5n1zNUcX6TM94b3QxOY=

internal/controller/externaldnswatcher_controller.go

@@ -0,0 +1,63 @@
+/*
+Copyright 2025.
+
+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 controller
+
+import (
+	"context"
+	gatewayv1 "sigs.k8s.io/gateway-api/apis/v1"
+
+	"k8s.io/apimachinery/pkg/runtime"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/log"
+)
+
+// ExternalDNSWatcherReconciler reconciles a ExternalDNSWatcher object
+type ExternalDNSWatcherReconciler struct {
+	client.Client
+	Scheme *runtime.Scheme
+}
+
+// +kubebuilder:rbac:groups=dns.mayers.cloud,resources=externaldnswatchers,verbs=get;list;watch;create;update;patch;delete
+// +kubebuilder:rbac:groups=dns.mayers.cloud,resources=externaldnswatchers/status,verbs=get;update;patch
+// +kubebuilder:rbac:groups=dns.mayers.cloud,resources=externaldnswatchers/finalizers,verbs=update
+
+// Reconcile is part of the main kubernetes reconciliation loop which aims to
+// move the current state of the cluster closer to the desired state.
+// TODO(user): Modify the Reconcile function to compare the state specified by
+// the ExternalDNSWatcher object against the actual cluster state, and then
+// perform operations to make the cluster state reflect the state specified by
+// the user.
+//
+// For more details, check Reconcile and its Result here:
+// - https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.19.0/pkg/reconcile
+func (r *ExternalDNSWatcherReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
+	_ = log.FromContext(ctx)
+
+	// TODO(user): your logic here
+
+	return ctrl.Result{}, nil
+}
+
+// SetupWithManager sets up the controller with the Manager.
+func (r *ExternalDNSWatcherReconciler) SetupWithManager(mgr ctrl.Manager) error {
+	return ctrl.NewControllerManagedBy(mgr).
+		// Uncomment the following line adding a pointer to an instance of the controlled resource as an argument
+		For(&gatewayv1.HTTPRoute{}).
+		For(&gatewayv1.Gateway{}).
+		Complete(r)
+}

internal/controller/externaldnswatcher_controller_test.go

@@ -0,0 +1,32 @@
+/*
+Copyright 2025.
+
+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 controller
+
+import (
+	. "github.com/onsi/ginkgo/v2"
+)
+
+var _ = Describe("ExternalDNSWatcher Controller", func() {
+	Context("When reconciling a resource", func() {
+
+		It("should successfully reconcile the resource", func() {
+
+			// TODO(user): Add more specific assertions depending on your controller's reconciliation logic.
+			// Example: If you expect a certain status condition after reconciliation, verify it here.
+		})
+	})
+})