move IsLocalIP() and ShouldSkipService() to pkg/proxy/util

pkg/proxy/util/utils.go

@@ -0,0 +1,58 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	"net"
+
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/helper"
+
+	"github.com/golang/glog"
+)
+
+func IsLocalIP(ip string) (bool, error) {
+	addrs, err := net.InterfaceAddrs()
+	if err != nil {
+		return false, err
+	}
+	for i := range addrs {
+		intf, _, err := net.ParseCIDR(addrs[i].String())
+		if err != nil {
+			return false, err
+		}
+		if net.ParseIP(ip).Equal(intf) {
+			return true, nil
+		}
+	}
+	return false, nil
+}
+
+func ShouldSkipService(svcName types.NamespacedName, service *api.Service) bool {
+	// if ClusterIP is "None" or empty, skip proxying
+	if !helper.IsServiceIPSet(service) {
+		glog.V(3).Infof("Skipping service %s due to clusterIP = %q", svcName, service.Spec.ClusterIP)
+		return true
+	}
+	// Even if ClusterIP is set, ServiceTypeExternalName services don't get proxied
+	if service.Spec.Type == api.ServiceTypeExternalName {
+		glog.V(3).Infof("Skipping service %s due to Type=ExternalName", svcName)
+		return true
+	}
+	return false
+}