diff --git a/metrics-server/vendor/k8s.io/apiserver/pkg/endpoints/discovery/addresses.go b/metrics-server/vendor/k8s.io/apiserver/pkg/endpoints/discovery/addresses.go
new file mode 100644
index 0000000..d175d15
--- /dev/null
+++ b/metrics-server/vendor/k8s.io/apiserver/pkg/endpoints/discovery/addresses.go
@@ -0,0 +1,72 @@
+/*
+Copyright 2016 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 discovery
+
+import (
+	"net"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+type Addresses interface {
+	ServerAddressByClientCIDRs(net.IP) []metav1.ServerAddressByClientCIDR
+}
+
+// DefaultAddresses is a default implementation of Addresses that will work in most cases
+type DefaultAddresses struct {
+	// CIDRRules is a list of CIDRs and Addresses to use if a client is in the range
+	CIDRRules []CIDRRule
+
+	// DefaultAddress is the address (hostname or IP and port) that should be used in
+	// if no CIDR matches more specifically.
+	DefaultAddress string
+}
+
+// CIDRRule is a rule for adding an alternate path to the master based on matching CIDR
+type CIDRRule struct {
+	IPRange net.IPNet
+
+	// Address is the address (hostname or IP and port) that should be used in
+	// if this CIDR matches
+	Address string
+}
+
+func (d DefaultAddresses) ServerAddressByClientCIDRs(clientIP net.IP) []metav1.ServerAddressByClientCIDR {
+	addressCIDRMap := []metav1.ServerAddressByClientCIDR{
+		{
+			ClientCIDR:    "0.0.0.0/0",
+			ServerAddress: d.DefaultAddress,
+		},
+	}
+
+	for _, rule := range d.CIDRRules {
+		addressCIDRMap = append(addressCIDRMap, rule.ServerAddressByClientCIDRs(clientIP)...)
+	}
+	return addressCIDRMap
+}
+
+func (d CIDRRule) ServerAddressByClientCIDRs(clientIP net.IP) []metav1.ServerAddressByClientCIDR {
+	addressCIDRMap := []metav1.ServerAddressByClientCIDR{}
+
+	if d.IPRange.Contains(clientIP) {
+		addressCIDRMap = append(addressCIDRMap, metav1.ServerAddressByClientCIDR{
+			ClientCIDR:    d.IPRange.String(),
+			ServerAddress: d.Address,
+		})
+	}
+	return addressCIDRMap
+}