Add validate gateway logic

Author: u-kai

.github/workflows/deploy-dev.yml

@@ -2,11 +2,14 @@ package k8s
 
 import (
 	"context"
+
+	"github.com/aws/aws-application-networking-k8s/pkg/config"
 	apierrors "k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/client-go/discovery"
 	ctrl "sigs.k8s.io/controller-runtime"
+
 	"sigs.k8s.io/controller-runtime/pkg/client"
 	gwv1 "sigs.k8s.io/gateway-api/apis/v1"
 )
@@ -53,6 +56,17 @@ func IsGVKSupported(mgr ctrl.Manager, groupVersion string, kind string) (bool, e
 	return false, nil
 }
 
+// validate if the gateway is managed by the lattice gateway controller
+func IsManagedGateway(ctx context.Context, c client.Client, gw *gwv1.Gateway) bool {
+	gwClass := &gwv1.GatewayClass{}
+	// GatewayClass is cluster-scoped resource, so we don't need to specify namespace
+	err := c.Get(ctx, client.ObjectKey{Name: string(gw.Spec.GatewayClassName)}, gwClass)
+	if err != nil {
+		return false
+	}
+	return gwClass.Spec.ControllerName == config.LatticeGatewayControllerName
+}
+
 func ObjExists(ctx context.Context, c client.Client, key types.NamespacedName, obj client.Object) (bool, error) {
 	err := c.Get(ctx, key, obj)
 	if err != nil {