add optional rootHost

.gitignore

@@ -5,6 +5,7 @@
 *.dll
 *.so
 *.dylib
+*.env
 bin/*
 Dockerfile.cross
 
@@ -29,3 +30,4 @@ Dockerfile.cross
 tmp
 
 config/local-setup/**/*.env
+local

api/v1alpha1/dnsrecord_types.go

@@ -26,6 +26,11 @@ import (
 
 // DNSRecordSpec defines the desired state of DNSRecord
 type DNSRecordSpec struct {
+
+	// rootHost is the single root for all endpoints in a DNSRecord.
+	//If rootHost is set, it is expected all defined endpoints are children 	of or equal to this rootHost
+	// +optional
+	RootHost *string `json:"rootHost,omitempty"`
 	// +kubebuilder:validation:Required
 	// +required
 	ManagedZoneRef *ManagedZoneReference `json:"managedZone,omitempty"`
@@ -101,31 +106,37 @@ const (
 	DefaultGeo string = "default"
 )
 
-// GetRootDomain returns the shortest domain that is shared across all spec.Endpoints dns names.
-// Validates that all endpoints share an equal root domain and returns an error if they don't.
-func (s *DNSRecord) GetRootDomain() (string, error) {
-	domain := ""
-	dnsNames := []string{}
-	for idx := range s.Spec.Endpoints {
-		dnsNames = append(dnsNames, s.Spec.Endpoints[idx].DNSName)
-	}
-	for idx := range dnsNames {
-		if domain == "" || len(domain) > len(dnsNames[idx]) {
-			domain = dnsNames[idx]
-		}
-	}
+const WildcardPrefix = "*."
 
-	if domain == "" {
-		return "", fmt.Errorf("unable to determine root domain from %v", dnsNames)
-	}
+func (s *DNSRecord) Validate() error {
+	if s.Spec.RootHost != nil {
+		root := *s.Spec.RootHost
+		if len(strings.Split(root, ".")) <= 1 {
+			return fmt.Errorf("invalid domain format no tld discovered")
+		}
+		if len(s.Spec.Endpoints) == 0 {
+			return fmt.Errorf("no endpoints defined for DNSRecord. Nothing to do.")
+		}
 
-	for idx := range dnsNames {
-		if !strings.HasSuffix(dnsNames[idx], domain) {
-			return "", fmt.Errorf("inconsitent domains, got %s, expected suffix %s", dnsNames[idx], domain)
+		root, _ = strings.CutPrefix(root, WildcardPrefix)
+
+		rootEndpointFound := false
+		for _, ep := range s.Spec.Endpoints {
+			if !strings.HasSuffix(ep.DNSName, root) {
+				return fmt.Errorf("invalid endpoint discovered %s all endpoints should be equal to or end with the rootHost %s", ep.DNSName, root)
+			}
+			if !rootEndpointFound {
+				//check original root
+				if ep.DNSName == *s.Spec.RootHost {
+					rootEndpointFound = true
+				}
+			}
+		}
+		if !rootEndpointFound {
+			return fmt.Errorf("invalid endpoint set. rootHost is set but found no endpoint defining a record for the rootHost %s", root)
 		}
 	}
-
-	return domain, nil
+	return nil
 }
 
 func init() {

api/v1alpha1/dnsrecord_types_test.go

@@ -3,79 +3,87 @@ package v1alpha1
 import (
 	"testing"
 
-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"sigs.k8s.io/external-dns/endpoint"
 )
 
-func TestDNSRecord_GetRootDomain(t *testing.T) {
+func TestValidate(t *testing.T) {
 	tests := []struct {
 		name     string
+		rootHost string
 		dnsNames []string
-		want     string
 		wantErr  bool
 	}{
 		{
-			name: "single endpoint",
+			name:     "invalid domain",
+			rootHost: "example",
+			wantErr:  true,
+		},
+		{
+			name:     "no endpoints",
+			rootHost: "example.com",
+			wantErr:  true,
+		},
+		{
+			name:     "invalid domain",
+			rootHost: "example.com",
 			dnsNames: []string{
-				"test.example.com",
+				"example.com",
+				"a.exmple.com",
 			},
-			want:    "test.example.com",
-			wantErr: false,
+			wantErr: true,
 		},
 		{
-			name: "multiple endpoints matching",
+			name:     "valid domain",
+			rootHost: "example.com",
 			dnsNames: []string{
-				"bar.baz.test.example.com",
-				"bar.test.example.com",
-				"test.example.com",
-				"foo.bar.baz.test.example.com",
+				"example.com",
+				"a.b.example.com",
+				"b.a.example.com",
+				"a.example.com",
+				"b.example.com",
 			},
-			want:    "test.example.com",
 			wantErr: false,
 		},
 		{
-			name:     "no endpoints",
-			dnsNames: []string{},
-			want:     "",
-			wantErr:  true,
+			name:     "valid wildcard domain",
+			rootHost: "*.example.com",
+			dnsNames: []string{
+				"*.example.com",
+				"a.b.example.com",
+				"b.a.example.com",
+				"a.example.com",
+				"b.example.com",
+			},
+			wantErr: false,
 		},
 		{
-			name: "multiple endpoints mismatching",
+			name:     "valid wildcard domain no endpoint",
+			rootHost: "*.example.com",
 			dnsNames: []string{
-				"foo.bar.test.example.com",
-				"bar.test.example.com",
-				"baz.example.com",
+				"a.b.example.com",
+				"b.a.example.com",
+				"a.example.com",
+				"b.example.com",
 			},
-			want:    "",
 			wantErr: true,
 		},
 	}
+
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			s := &DNSRecord{
-				TypeMeta: metav1.TypeMeta{
-					Kind:       "DNSRecord",
-					APIVersion: GroupVersion.String(),
-				},
-				ObjectMeta: metav1.ObjectMeta{
-					Name:      "testRecord",
-					Namespace: "testNS",
-				},
+			record := &DNSRecord{
 				Spec: DNSRecordSpec{
-					Endpoints: []*endpoint.Endpoint{},
+					RootHost: &tt.rootHost,
 				},
 			}
 			for idx := range tt.dnsNames {
-				s.Spec.Endpoints = append(s.Spec.Endpoints, &endpoint.Endpoint{DNSName: tt.dnsNames[idx]})
+				record.Spec.Endpoints = append(record.Spec.Endpoints, &endpoint.Endpoint{DNSName: tt.dnsNames[idx]})
 			}
-			got, err := s.GetRootDomain()
+			err := record.Validate()
 			if (err != nil) != tt.wantErr {
-				t.Errorf("GetRootDomain() error = %v, wantErr %v", err, tt.wantErr)
+				t.Errorf("Validate() error = %v, wantErr %v", err, tt.wantErr)
 				return
 			}
-			if got != tt.want {
-				t.Errorf("GetRootDomain() got = %v, want %v", got, tt.want)
-			}
 		})
 	}
 }

bundle/manifests/dns-operator.clusterserviceversion.yaml

@@ -56,7 +56,7 @@ metadata:
     capabilities: Basic Install
     categories: Integration & Delivery
     containerImage: quay.io/kuadrant/dns-operator:latest
-    createdAt: "2024-03-11T11:01:25Z"
+    createdAt: "2024-03-11T14:53:47Z"
     description: A Kubernetes Operator to manage the lifecycle of DNS resources
     operators.operatorframework.io/builder: operator-sdk-v1.33.0
     operators.operatorframework.io/project_layout: go.kubebuilder.io/v4

bundle/manifests/kuadrant.io_dnsrecords.yaml

@@ -94,6 +94,11 @@ spec:
                 required:
                 - name
                 type: object
+              rootHost:
+                description: "rootHost is the single root for all endpoints in a DNSRecord.
+                  If rootHost is set, it is expected all defined endpoints are children
+                  \tof or equal to this rootHost"
+                type: string
             type: object
           status:
             description: DNSRecordStatus defines the observed state of DNSRecord

config/crd/bases/kuadrant.io_dnsrecords.yaml

@@ -94,6 +94,11 @@ spec:
                 required:
                 - name
                 type: object
+              rootHost:
+                description: "rootHost is the single root for all endpoints in a DNSRecord.
+                  If rootHost is set, it is expected all defined endpoints are children
+                  \tof or equal to this rootHost"
+                type: string
             type: object
           status:
             description: DNSRecordStatus defines the observed state of DNSRecord

internal/controller/dnsrecord_controller.go

@@ -31,6 +31,7 @@ import (
 	"sigs.k8s.io/controller-runtime/pkg/client"
 	"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
 	"sigs.k8s.io/controller-runtime/pkg/log"
+	"sigs.k8s.io/controller-runtime/pkg/reconcile"
 	externaldnsendpoint "sigs.k8s.io/external-dns/endpoint"
 	externaldnsplan "sigs.k8s.io/external-dns/plan"
 	externaldnsprovider "sigs.k8s.io/external-dns/provider"
@@ -99,31 +100,39 @@ func (r *DNSRecordReconciler) Reconcile(ctx context.Context, req ctrl.Request) (
 	status := metav1.ConditionTrue
 	reason = "ProviderSuccess"
 	message = "Provider ensured the dns record"
-
+	err = dnsRecord.Validate()
+	if err != nil {
+		status = metav1.ConditionFalse
+		reason = "ValidationError"
+		message = fmt.Sprintf("validation of DNSRecord failed: %v", err)
+		setDNSRecordCondition(dnsRecord, string(conditions.ConditionTypeReady), status, reason, message)
+		return r.updateStatus(ctx, previous, dnsRecord)
+	}
 	// Publish the record
 	err = r.publishRecord(ctx, dnsRecord)
 	if err != nil {
 		status = metav1.ConditionFalse
 		reason = "ProviderError"
 		message = fmt.Sprintf("The DNS provider failed to ensure the record: %v", provider.SanitizeError(err))
-	} else {
-		dnsRecord.Status.ObservedGeneration = dnsRecord.Generation
-		dnsRecord.Status.Endpoints = dnsRecord.Spec.Endpoints
+		setDNSRecordCondition(dnsRecord, string(conditions.ConditionTypeReady), status, reason, message)
+		return r.updateStatus(ctx, previous, dnsRecord)
 	}
+	// success
 	setDNSRecordCondition(dnsRecord, string(conditions.ConditionTypeReady), status, reason, message)
+	dnsRecord.Status.ObservedGeneration = dnsRecord.Generation
+	dnsRecord.Status.Endpoints = dnsRecord.Spec.Endpoints
+	return r.updateStatus(ctx, previous, dnsRecord)
+}
 
-	if !equality.Semantic.DeepEqual(previous.Status, dnsRecord.Status) {
-		updateErr := r.Status().Update(ctx, dnsRecord)
-		if updateErr != nil {
-			// Ignore conflicts, resource might just be outdated.
-			if apierrors.IsConflict(updateErr) {
-				return ctrl.Result{Requeue: true}, nil
-			}
-			return ctrl.Result{}, updateErr
+func (r *DNSRecordReconciler) updateStatus(ctx context.Context, previous, current *v1alpha1.DNSRecord) (reconcile.Result, error) {
+	if !equality.Semantic.DeepEqual(previous.Status, current.Status) {
+		updateError := r.Status().Update(ctx, current)
+		if apierrors.IsConflict(updateError) {
+			return ctrl.Result{Requeue: true}, nil
 		}
+		return ctrl.Result{}, updateError
 	}
-
-	return ctrl.Result{}, err
+	return ctrl.Result{}, nil
 }
 
 // SetupWithManager sets up the controller with the Manager.
@@ -175,7 +184,6 @@ func (r *DNSRecordReconciler) deleteRecord(ctx context.Context, dnsRecord *v1alp
 // DNSRecord (dnsRecord.Status.ParentManagedZone).
 func (r *DNSRecordReconciler) publishRecord(ctx context.Context, dnsRecord *v1alpha1.DNSRecord) error {
 	logger := log.FromContext(ctx)
-
 	managedZone := &v1alpha1.ManagedZone{
 		ObjectMeta: metav1.ObjectMeta{
 			Name:      dnsRecord.Spec.ManagedZoneRef.Name,
@@ -220,22 +228,18 @@ func setDNSRecordCondition(dnsRecord *v1alpha1.DNSRecord, conditionType string,
 
 func (r *DNSRecordReconciler) applyChanges(ctx context.Context, dnsRecord *v1alpha1.DNSRecord, managedZone *v1alpha1.ManagedZone, isDelete bool) error {
 	logger := log.FromContext(ctx)
-
-	rootDomain, err := dnsRecord.GetRootDomain()
-	if err != nil {
-		return err
-	}
-	if !strings.HasSuffix(rootDomain, managedZone.Spec.DomainName) {
-		return fmt.Errorf("inconsitent domains, does not match managedzone, got %s, expected suffix %s", rootDomain, managedZone.Spec.DomainName)
+	filterDomain, _ := strings.CutPrefix(managedZone.Spec.DomainName, v1alpha1.WildcardPrefix)
+	if dnsRecord.Spec.RootHost != nil {
+		filterDomain = *dnsRecord.Spec.RootHost
 	}
-	rootDomainFilter := externaldnsendpoint.NewDomainFilter([]string{rootDomain})
+	rootDomainFilter := externaldnsendpoint.NewDomainFilter([]string{filterDomain})
 
 	providerConfig := provider.Config{
 		DomainFilter:   externaldnsendpoint.NewDomainFilter([]string{managedZone.Spec.DomainName}),
 		ZoneTypeFilter: externaldnsprovider.NewZoneTypeFilter(""),
 		ZoneIDFilter:   externaldnsprovider.NewZoneIDFilter([]string{managedZone.Status.ID}),
 	}
-	logger.V(3).Info("applyChanges", "rootDomain", rootDomain, "rootDomainFilter", rootDomainFilter, "providerConfig", providerConfig)
+	logger.V(3).Info("applyChanges", "zone", managedZone.Spec.DomainName, "rootDomainFilter", rootDomainFilter, "providerConfig", providerConfig)
 	dnsProvider, err := r.ProviderFactory.ProviderFor(ctx, managedZone, providerConfig)
 	if err != nil {
 		return err