Return unique addresses from service

Author: hazim1093

internal/ingress/status/status.go

@@ -25,6 +25,7 @@ import (
 	"time"
 
 	"github.com/pkg/errors"
+	"k8s.io/apimachinery/pkg/util/sets"
 	"k8s.io/klog/v2"
 
 	pool "gopkg.in/go-playground/pool.v3"
@@ -339,26 +340,26 @@ func statusAddressFromService(service string, kubeClient clientset.Interface) ([
 	case apiv1.ServiceTypeClusterIP:
 		return []string{svc.Spec.ClusterIP}, nil
 	case apiv1.ServiceTypeNodePort:
-		addresses := []string{}
+		addresses := sets.NewString()
 		if svc.Spec.ExternalIPs != nil {
-			addresses = append(addresses, svc.Spec.ExternalIPs...)
+			addresses.Insert(svc.Spec.ExternalIPs...)
 		} else {
-			addresses = append(addresses, svc.Spec.ClusterIP)
+			addresses.Insert(svc.Spec.ClusterIP)
 		}
-		return addresses, nil
+		return addresses.List(), nil
 	case apiv1.ServiceTypeLoadBalancer:
-		addresses := []string{}
+		addresses := sets.NewString()
 		for _, ip := range svc.Status.LoadBalancer.Ingress {
 			if ip.IP == "" {
-				addresses = append(addresses, ip.Hostname)
+				addresses.Insert(ip.Hostname)
 			} else {
-				addresses = append(addresses, ip.IP)
+				addresses.Insert(ip.IP)
 			}
 		}
 
-		addresses = append(addresses, svc.Spec.ExternalIPs...)
+		addresses.Insert(svc.Spec.ExternalIPs...)
 
-		return addresses, nil
+		return addresses.List(), nil
 	}
 
 	return nil, fmt.Errorf("unable to extract IP address/es from service %v", service)

internal/ingress/status/status_test.go

@@ -483,6 +483,34 @@ func TestRunningAddresessWithPublishService(t *testing.T) {
 			[]string{"10.0.0.1", "foo"},
 			false,
 		},
+		"service type LoadBalancer with same externalIP and ingress IP": {
+			testclient.NewSimpleClientset(
+				&apiv1.ServiceList{Items: []apiv1.Service{
+					{
+						ObjectMeta: metav1.ObjectMeta{
+							Name:      "foo",
+							Namespace: apiv1.NamespaceDefault,
+						},
+						Spec: apiv1.ServiceSpec{
+							Type:        apiv1.ServiceTypeLoadBalancer,
+							ExternalIPs: []string{"10.0.0.1"},
+						},
+						Status: apiv1.ServiceStatus{
+							LoadBalancer: apiv1.LoadBalancerStatus{
+								Ingress: []apiv1.LoadBalancerIngress{
+									{
+										IP: "10.0.0.1",
+									},
+								},
+							},
+						},
+					},
+				},
+				},
+			),
+			[]string{"10.0.0.1"},
+			false,
+		},
 		"invalid service type": {
 			testclient.NewSimpleClientset(
 				&apiv1.ServiceList{Items: []apiv1.Service{