Refactor DNS name extraction

Goal --- Ease the implementation of CRD based multi-ingress controller traffic routing Change-Id: I46f513341ce01ec6e9d67897c6d0cb58aeec3021
adevinta · Dec 10, 2024 · bd4c585 · bd4c585
1 parent b07a195
commit bd4c585
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Showing 2 changed files with 43 additions and 10 deletions.
diff --git a/pkg/controllers/ingress_controller.go b/pkg/controllers/ingress_controller.go
@@ -89,6 +89,14 @@ func (r *IngressReconciler) ingressAnnotationMatchFilter(ingress netv1.Ingress)
 	return r.ingressHasAnnotationKeyValue(ingress, r.AnnotationFilter.key, r.AnnotationFilter.value)
 }
 
+func (r *IngressReconciler) listFilteredIngressHosts(ingress *netv1.Ingress) []string {
+	hosts := []string{}
+	for _, rule := range r.filterIngressRulesByHost(ingress.Spec.Rules) {
+		hosts = append(hosts, rule.Host)
+	}
+	return hosts
+}
+
 func (r *IngressReconciler) filterIngressRulesByHost(rules []netv1.IngressRule) []netv1.IngressRule {
 	rulesToBind := []netv1.IngressRule{}
 	for _, rule := range rules {
@@ -192,18 +200,24 @@ func (r *IngressReconciler) newDnsEndpoint(ctx context.Context, dnsEndpoint *ext
 		desiredWeight = 0
 	}
 	dnsEndpoint.Spec = externaldnsk8siov1alpha1.DNSEndpointSpec{Endpoints: []*externaldnsk8siov1alpha1.Endpoint{}}
-	for _, rule := range r.filterIngressRulesByHost(ingress.Spec.Rules) {
 
-		ep := &externaldnsk8siov1alpha1.Endpoint{
-			DNSName:       rule.Host,
-			RecordType:    "CNAME",
-			SetIdentifier: r.ClusterName,
-		}
-		r.addIngressTargetsToEndpoint(ep, ingress)
+	dnsNames := r.listFilteredIngressHosts(&ingress)
 
-		setEndpointProviderSpecificProperty(ep, WeightProperty, strconv.FormatUint(uint64(desiredWeight), 10))
-		setGlobalHealthCheckID(ep)
-		dnsEndpoint.Spec.Endpoints = append(dnsEndpoint.Spec.Endpoints, ep)
+	if len(ingress.Status.LoadBalancer.Ingress) > 0 {
+		for _, dnsName := range dnsNames {
+
+			ep := &externaldnsk8siov1alpha1.Endpoint{
+				DNSName:       dnsName,
+				RecordType:    "CNAME",
+				SetIdentifier: r.ClusterName,
+			}
+			r.addIngressTargetsToEndpoint(ep, ingress)
+
+			setEndpointProviderSpecificProperty(ep, WeightProperty, strconv.FormatUint(uint64(desiredWeight), 10))
+
+			setGlobalHealthCheckID(ep)
+			dnsEndpoint.Spec.Endpoints = append(dnsEndpoint.Spec.Endpoints, ep)
+		}
 	}
 }
 

diff --git a/pkg/controllers/ingress_controller_test.go b/pkg/controllers/ingress_controller_test.go
@@ -510,3 +510,22 @@ func TestEndpointsHasPods(t *testing.T) {
 
 	assert.False(t, r.endpointsHasPods(MockEndpoints(WithObjectFinalizers[*v1.Endpoints]("test.adevinta.com"), WithObjectDeletionTimestamp[*v1.Endpoints](metav1.Now()))))
 }
+
+func TestListFilteredIngressHosts(t *testing.T) {
+	r := IngressReconciler{
+		BindingDomain: "example.com",
+	}
+	assert.ElementsMatch(
+		t,
+		[]string{"host1.example.com", "example.com"},
+		r.listFilteredIngressHosts(
+			MockIngress(
+				IngressWithRules(
+					NewRule(RuleWithHost("host1.example.com")),
+					NewRule(RuleWithHost("example.com")),
+					NewRule(RuleWithHost("adevinta.com")),
+				),
+			),
+		),
+	)
+}