Merge current branch v2.4 into master

pkg/provider/kubernetes/ingress/kubernetes_test.go

@@ -729,6 +729,33 @@ func TestLoadConfigurationFromIngresses(t *testing.T) {
 				},
 			},
 		},
+		{
+			desc: "Ingress with port invalid for one service",
+			expected: &dynamic.Configuration{
+				TCP: &dynamic.TCPConfiguration{},
+				HTTP: &dynamic.HTTPConfiguration{
+					Middlewares: map[string]*dynamic.Middleware{},
+					Routers: map[string]*dynamic.Router{
+						"testing-traefik-port-port": {
+							Rule:    "Host(`traefik.port`) && PathPrefix(`/port`)",
+							Service: "testing-service1-8080",
+						},
+					},
+					Services: map[string]*dynamic.Service{
+						"testing-service1-8080": {
+							LoadBalancer: &dynamic.ServersLoadBalancer{
+								PassHostHeader: Bool(true),
+								Servers: []dynamic.Server{
+									{
+										URL: "http://10.0.0.1:8080",
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
 		{
 			desc: "Ingress with IPv6 endpoints",
 			expected: &dynamic.Configuration{