go.etcd.io/etcd@v3.3.27+incompatible/client/discover.go (about)

     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  	"github.com/coreos/etcd/pkg/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) ([]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) ([]string, error) {
    35  	srvs, err := srv.GetClient("etcd-client", domain)
    36  	if err != nil {
    37  		return nil, err
    38  	}
    39  	return srvs.Endpoints, nil
    40  }