add __meta_kubernetes_service_port_number (#10945)

Signed-off-by: yngwiewang <yngwiewang@163.com>

discovery/kubernetes/service.go

@@ -150,6 +150,7 @@ const (
 	serviceAnnotationPrefix        = metaLabelPrefix + "service_annotation_"
 	serviceAnnotationPresentPrefix = metaLabelPrefix + "service_annotationpresent_"
 	servicePortNameLabel           = metaLabelPrefix + "service_port_name"
+	servicePortNumberLabel         = metaLabelPrefix + "service_port_number"
 	servicePortProtocolLabel       = metaLabelPrefix + "service_port_protocol"
 	serviceClusterIPLabel          = metaLabelPrefix + "service_cluster_ip"
 	serviceExternalNameLabel       = metaLabelPrefix + "service_external_name"
@@ -189,6 +190,7 @@ func (s *Service) buildService(svc *apiv1.Service) *targetgroup.Group {
 		labelSet := model.LabelSet{
 			model.AddressLabel:       lv(addr),
 			servicePortNameLabel:     lv(port.Name),
+			servicePortNumberLabel:   lv(strconv.FormatInt(int64(port.Port), 10)),
 			servicePortProtocolLabel: lv(string(port.Protocol)),
 			serviceType:              lv(string(svc.Spec.Type)),
 		}

discovery/kubernetes/service_test.go

@@ -117,6 +117,7 @@ func TestServiceDiscoveryAdd(t *testing.T) {
 						"__meta_kubernetes_service_type":        "ClusterIP",
 						"__meta_kubernetes_service_cluster_ip":  "10.0.0.1",
 						"__meta_kubernetes_service_port_name":   "testport",
+						"__meta_kubernetes_service_port_number": "30900",
 					},
 				},
 				Labels: model.LabelSet{
@@ -132,6 +133,7 @@ func TestServiceDiscoveryAdd(t *testing.T) {
 						"__address__":                             "testservice-external.default.svc:31900",
 						"__meta_kubernetes_service_type":          "ExternalName",
 						"__meta_kubernetes_service_port_name":     "testport",
+						"__meta_kubernetes_service_port_number":   "31900",
 						"__meta_kubernetes_service_external_name": "FooExternalName",
 					},
 				},
@@ -182,6 +184,7 @@ func TestServiceDiscoveryUpdate(t *testing.T) {
 						"__meta_kubernetes_service_type":        "ClusterIP",
 						"__meta_kubernetes_service_cluster_ip":  "10.0.0.1",
 						"__meta_kubernetes_service_port_name":   "testport0",
+						"__meta_kubernetes_service_port_number": "30900",
 					},
 					{
 						"__meta_kubernetes_service_port_protocol": "UDP",
@@ -189,6 +192,7 @@ func TestServiceDiscoveryUpdate(t *testing.T) {
 						"__meta_kubernetes_service_type":        "ClusterIP",
 						"__meta_kubernetes_service_cluster_ip":  "10.0.0.1",
 						"__meta_kubernetes_service_port_name":   "testport1",
+						"__meta_kubernetes_service_port_number": "30901",
 					},
 				},
 				Labels: model.LabelSet{
@@ -227,6 +231,7 @@ func TestServiceDiscoveryNamespaces(t *testing.T) {
 						"__meta_kubernetes_service_type":        "ClusterIP",
 						"__meta_kubernetes_service_cluster_ip":  "10.0.0.1",
 						"__meta_kubernetes_service_port_name":   "testport",
+						"__meta_kubernetes_service_port_number": "30900",
 					},
 				},
 				Labels: model.LabelSet{
@@ -243,6 +248,7 @@ func TestServiceDiscoveryNamespaces(t *testing.T) {
 						"__meta_kubernetes_service_type":        "ClusterIP",
 						"__meta_kubernetes_service_cluster_ip":  "10.0.0.1",
 						"__meta_kubernetes_service_port_name":   "testport",
+						"__meta_kubernetes_service_port_number": "30900",
 					},
 				},
 				Labels: model.LabelSet{
@@ -277,6 +283,7 @@ func TestServiceDiscoveryOwnNamespace(t *testing.T) {
 						"__meta_kubernetes_service_type":        "ClusterIP",
 						"__meta_kubernetes_service_cluster_ip":  "10.0.0.1",
 						"__meta_kubernetes_service_port_name":   "testport",
+						"__meta_kubernetes_service_port_number": "30900",
 					},
 				},
 				Labels: model.LabelSet{
@@ -311,6 +318,7 @@ func TestServiceDiscoveryAllNamespaces(t *testing.T) {
 						"__meta_kubernetes_service_type":        "ClusterIP",
 						"__meta_kubernetes_service_cluster_ip":  "10.0.0.1",
 						"__meta_kubernetes_service_port_name":   "testport",
+						"__meta_kubernetes_service_port_number": "30900",
 					},
 				},
 				Labels: model.LabelSet{
@@ -327,6 +335,7 @@ func TestServiceDiscoveryAllNamespaces(t *testing.T) {
 						"__meta_kubernetes_service_type":        "ClusterIP",
 						"__meta_kubernetes_service_cluster_ip":  "10.0.0.1",
 						"__meta_kubernetes_service_port_name":   "testport",
+						"__meta_kubernetes_service_port_number": "30900",
 					},
 				},
 				Labels: model.LabelSet{