diff --git a/vendor/go.etcd.io/etcd/pkg/types/urlsmap.go b/vendor/go.etcd.io/etcd/pkg/types/urlsmap.go
new file mode 100644
index 0000000..47690cc
--- /dev/null
+++ b/vendor/go.etcd.io/etcd/pkg/types/urlsmap.go
@@ -0,0 +1,107 @@
+// Copyright 2015 The etcd 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 types
+
+import (
+	"fmt"
+	"sort"
+	"strings"
+)
+
+// URLsMap is a map from a name to its URLs.
+type URLsMap map[string]URLs
+
+// NewURLsMap returns a URLsMap instantiated from the given string,
+// which consists of discovery-formatted names-to-URLs, like:
+// mach0=http://1.1.1.1:2380,mach0=http://2.2.2.2::2380,mach1=http://3.3.3.3:2380,mach2=http://4.4.4.4:2380
+func NewURLsMap(s string) (URLsMap, error) {
+	m := parse(s)
+
+	cl := URLsMap{}
+	for name, urls := range m {
+		us, err := NewURLs(urls)
+		if err != nil {
+			return nil, err
+		}
+		cl[name] = us
+	}
+	return cl, nil
+}
+
+// NewURLsMapFromStringMap takes a map of strings and returns a URLsMap. The
+// string values in the map can be multiple values separated by the sep string.
+func NewURLsMapFromStringMap(m map[string]string, sep string) (URLsMap, error) {
+	var err error
+	um := URLsMap{}
+	for k, v := range m {
+		um[k], err = NewURLs(strings.Split(v, sep))
+		if err != nil {
+			return nil, err
+		}
+	}
+	return um, nil
+}
+
+// String turns URLsMap into discovery-formatted name-to-URLs sorted by name.
+func (c URLsMap) String() string {
+	var pairs []string
+	for name, urls := range c {
+		for _, url := range urls {
+			pairs = append(pairs, fmt.Sprintf("%s=%s", name, url.String()))
+		}
+	}
+	sort.Strings(pairs)
+	return strings.Join(pairs, ",")
+}
+
+// URLs returns a list of all URLs.
+// The returned list is sorted in ascending lexicographical order.
+func (c URLsMap) URLs() []string {
+	var urls []string
+	for _, us := range c {
+		for _, u := range us {
+			urls = append(urls, u.String())
+		}
+	}
+	sort.Strings(urls)
+	return urls
+}
+
+// Len returns the size of URLsMap.
+func (c URLsMap) Len() int {
+	return len(c)
+}
+
+// parse parses the given string and returns a map listing the values specified for each key.
+func parse(s string) map[string][]string {
+	m := make(map[string][]string)
+	for s != "" {
+		key := s
+		if i := strings.IndexAny(key, ","); i >= 0 {
+			key, s = key[:i], key[i+1:]
+		} else {
+			s = ""
+		}
+		if key == "" {
+			continue
+		}
+		value := ""
+		if i := strings.Index(key, "="); i >= 0 {
+			key, value = key[:i], key[i+1:]
+		}
+		m[key] = append(m[key], value)
+	}
+	return m
+}