1 // Copyright 2015 The etcd Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package client 16 17 import ( 18 "go.etcd.io/etcd/client/pkg/v3/srv" 19 ) 20 21 // Discoverer is an interface that wraps the Discover method. 22 type Discoverer interface { 23 // Discover looks up the etcd servers for the domain. 24 Discover(domain string, serviceName string) ([]string, error) 25 } 26 27 type srvDiscover struct{} 28 29 // NewSRVDiscover constructs a new Discoverer that uses the stdlib to lookup SRV records. 30 func NewSRVDiscover() Discoverer { 31 return &srvDiscover{} 32 } 33 34 func (d *srvDiscover) Discover(domain string, serviceName string) ([]string, error) { 35 srvs, err := srv.GetClient("etcd-client", domain, serviceName) 36 if err != nil { 37 return nil, err 38 } 39 return srvs.Endpoints, nil 40 } 41