From 3782cb40d582d49b264230c6bd1307ee2df44c07 Mon Sep 17 00:00:00 2001
From: Karl Piplies <karl.piplies@mercedes-benz.com>
Date: Wed, 10 Aug 2022 12:20:43 +0200
Subject: [PATCH 1/2] add loadbalancerip to service labels

Signed-off-by: Karl Piplies <karl.piplies@mercedes-benz.com>
---
 discovery/kubernetes/service.go      |  5 ++++
 discovery/kubernetes/service_test.go | 43 +++++++++++++++++++++++++++-
 2 files changed, 47 insertions(+), 1 deletion(-)

diff --git a/discovery/kubernetes/service.go b/discovery/kubernetes/service.go
index 3db48ab6e..44ebcbc19 100644
--- a/discovery/kubernetes/service.go
+++ b/discovery/kubernetes/service.go
@@ -153,6 +153,7 @@ const (
 	servicePortNumberLabel         = metaLabelPrefix + "service_port_number"
 	servicePortProtocolLabel       = metaLabelPrefix + "service_port_protocol"
 	serviceClusterIPLabel          = metaLabelPrefix + "service_cluster_ip"
+	serviceLoadBalancerIP          = metaLabelPrefix + "service_loadbalancer_ip"
 	serviceExternalNameLabel       = metaLabelPrefix + "service_external_name"
 	serviceType                    = metaLabelPrefix + "service_type"
 )
@@ -201,6 +202,10 @@ func (s *Service) buildService(svc *apiv1.Service) *targetgroup.Group {
 			labelSet[serviceClusterIPLabel] = lv(svc.Spec.ClusterIP)
 		}
 
+		if svc.Spec.Type == apiv1.ServiceTypeLoadBalancer {
+			labelSet[serviceLoadBalancerIP] = lv(svc.Spec.LoadBalancerIP)
+		}
+
 		tg.Targets = append(tg.Targets, labelSet)
 	}
 
diff --git a/discovery/kubernetes/service_test.go b/discovery/kubernetes/service_test.go
index 4aeddfad7..dde3aaea5 100644
--- a/discovery/kubernetes/service_test.go
+++ b/discovery/kubernetes/service_test.go
@@ -96,6 +96,27 @@ func makeExternalService() *v1.Service {
 	}
 }
 
+func makeLoadBalancerService() *v1.Service {
+	return &v1.Service{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      "testservice-loadbalancer",
+			Namespace: "default",
+		},
+		Spec: v1.ServiceSpec{
+			Ports: []v1.ServicePort{
+				{
+					Name:     "testport",
+					Protocol: v1.ProtocolTCP,
+					Port:     int32(31900),
+				},
+			},
+			Type:           v1.ServiceTypeLoadBalancer,
+			LoadBalancerIP: "127.0.0.1",
+			ClusterIP:      "10.0.0.1",
+		},
+	}
+}
+
 func TestServiceDiscoveryAdd(t *testing.T) {
 	n, c := makeDiscovery(RoleService, NamespaceDiscovery{})
 
@@ -106,8 +127,10 @@ func TestServiceDiscoveryAdd(t *testing.T) {
 			c.CoreV1().Services(obj.Namespace).Create(context.Background(), obj, metav1.CreateOptions{})
 			obj = makeExternalService()
 			c.CoreV1().Services(obj.Namespace).Create(context.Background(), obj, metav1.CreateOptions{})
+			obj = makeLoadBalancerService()
+			c.CoreV1().Services(obj.Namespace).Create(context.Background(), obj, metav1.CreateOptions{})
 		},
-		expectedMaxItems: 2,
+		expectedMaxItems: 3,
 		expectedRes: map[string]*targetgroup.Group{
 			"svc/default/testservice": {
 				Targets: []model.LabelSet{
@@ -143,6 +166,24 @@ func TestServiceDiscoveryAdd(t *testing.T) {
 				},
 				Source: "svc/default/testservice-external",
 			},
+			"svc/default/testservice-loadbalancer": {
+				Targets: []model.LabelSet{
+					{
+						"__meta_kubernetes_service_port_protocol": "TCP",
+						"__address__":                               "testservice-loadbalancer.default.svc:31900",
+						"__meta_kubernetes_service_type":            "LoadBalancer",
+						"__meta_kubernetes_service_port_name":       "testport",
+						"__meta_kubernetes_service_port_number":     "31900",
+						"__meta_kubernetes_service_cluster_ip":      "10.0.0.1",
+						"__meta_kubernetes_service_loadbalancer_ip": "127.0.0.1",
+					},
+				},
+				Labels: model.LabelSet{
+					"__meta_kubernetes_service_name": "testservice-loadbalancer",
+					"__meta_kubernetes_namespace":    "default",
+				},
+				Source: "svc/default/testservice-loadbalancer",
+			},
 		},
 	}.Run(t)
 }

From cc469e00851e4e9626fb0a16430965da2820d714 Mon Sep 17 00:00:00 2001
From: Karl Piplies <karl.piplies@mercedes-benz.com>
Date: Wed, 10 Aug 2022 12:34:28 +0200
Subject: [PATCH 2/2] documentation for the loadbalancerip

Signed-off-by: Karl Piplies <karl.piplies@mercedes-benz.com>
---
 docs/configuration/configuration.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/docs/configuration/configuration.md b/docs/configuration/configuration.md
index 6e45dbfc6..22aedb5f4 100644
--- a/docs/configuration/configuration.md
+++ b/docs/configuration/configuration.md
@@ -1678,6 +1678,7 @@ Available meta labels:
 * `__meta_kubernetes_service_annotation_<annotationname>`: Each annotation from the service object.
 * `__meta_kubernetes_service_annotationpresent_<annotationname>`: "true" for each annotation of the service object.
 * `__meta_kubernetes_service_cluster_ip`: The cluster IP address of the service. (Does not apply to services of type ExternalName)
+* `__meta_kubernetes_service_loadbalancer_ip`: The IP address of the loadbalancer. (Applies to services of type LoadBalancer)
 * `__meta_kubernetes_service_external_name`: The DNS name of the service. (Applies to services of type ExternalName)
 * `__meta_kubernetes_service_label_<labelname>`: Each label from the service object.
 * `__meta_kubernetes_service_labelpresent_<labelname>`: `true` for each label of the service object.