// Copyright 2017 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 naming provides an etcd-backed gRPC resolver for discovering gRPC services. // // To use, first import the packages: // // import ( // "go.etcd.io/etcd/clientv3" // etcdnaming "go.etcd.io/etcd/clientv3/naming" // // "google.golang.org/grpc" // "google.golang.org/grpc/naming" // ) // // First, register new endpoint addresses for a service: // // func etcdAdd(c *clientv3.Client, service, addr string) error { // r := &etcdnaming.GRPCResolver{Client: c} // return r.Update(c.Ctx(), service, naming.Update{Op: naming.Add, Addr: addr}) // } // // Dial an RPC service using the etcd gRPC resolver and a gRPC Balancer: // // func etcdDial(c *clientv3.Client, service string) (*grpc.ClientConn, error) { // r := &etcdnaming.GRPCResolver{Client: c} // b := grpc.RoundRobin(r) // return grpc.Dial(service, grpc.WithBalancer(b)) // } // // Optionally, force delete an endpoint: // // func etcdDelete(c *clientv3, service, addr string) error { // r := &etcdnaming.GRPCResolver{Client: c} // return r.Update(c.Ctx(), service, naming.Update{Op: naming.Delete, Addr: "1.2.3.4"}) // } // // Or register an expiring endpoint with a lease: // // func etcdLeaseAdd(c *clientv3.Client, lid clientv3.LeaseID, service, addr string) error { // r := &etcdnaming.GRPCResolver{Client: c} // return r.Update(c.Ctx(), service, naming.Update{Op: naming.Add, Addr: addr}, clientv3.WithLease(lid)) // } // package naming