1 // Copyright 2016 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 api 16 17 import ( 18 "go.etcd.io/etcd/client/pkg/v3/types" 19 "go.etcd.io/etcd/server/v3/etcdserver/api/membership" 20 21 "github.com/coreos/go-semver/semver" 22 ) 23 24 // Cluster is an interface representing a collection of members in one etcd cluster. 25 type Cluster interface { 26 // ID returns the cluster ID 27 ID() types.ID 28 // ClientURLs returns an aggregate set of all URLs on which this 29 // cluster is listening for client requests 30 ClientURLs() []string 31 // Members returns a slice of members sorted by their ID 32 Members() []*membership.Member 33 // Member retrieves a particular member based on ID, or nil if the 34 // member does not exist in the cluster 35 Member(id types.ID) *membership.Member 36 // Version is the cluster-wide minimum major.minor version. 37 Version() *semver.Version 38 } 39