add proxy metrics in app level

cmd/kube-proxy/app/BUILD

@@ -36,6 +36,7 @@ go_library(
         "//pkg/proxy/healthcheck:go_default_library",
         "//pkg/proxy/iptables:go_default_library",
         "//pkg/proxy/ipvs:go_default_library",
+        "//pkg/proxy/metrics:go_default_library",
         "//pkg/proxy/userspace:go_default_library",
         "//pkg/util/configz:go_default_library",
         "//pkg/util/dbus:go_default_library",

cmd/kube-proxy/app/server_others.go

@@ -39,6 +39,7 @@ import (
 	"k8s.io/kubernetes/pkg/proxy/healthcheck"
 	"k8s.io/kubernetes/pkg/proxy/iptables"
 	"k8s.io/kubernetes/pkg/proxy/ipvs"
+	"k8s.io/kubernetes/pkg/proxy/metrics"
 	"k8s.io/kubernetes/pkg/proxy/userspace"
 	"k8s.io/kubernetes/pkg/util/configz"
 	utildbus "k8s.io/kubernetes/pkg/util/dbus"
@@ -143,7 +144,6 @@ func NewProxyServer(config *componentconfig.KubeProxyConfiguration, cleanupAndEx
 		if err != nil {
 			return nil, fmt.Errorf("unable to create proxier: %v", err)
 		}
-		iptables.RegisterMetrics()
 		proxier = proxierIPTables
 		serviceEventHandler = proxierIPTables
 		endpointsEventHandler = proxierIPTables
@@ -218,6 +218,8 @@ func NewProxyServer(config *componentconfig.KubeProxyConfiguration, cleanupAndEx
 
 	iptInterface.AddReloadFunc(proxier.Sync)
 
+	metrics.RegisterMetrics()
+
 	return &ProxyServer{
 		Client:                 client,
 		EventClient:            eventClient,