feat: support tls for etcd client (#1390)

* feat: support tls for etcd client

* chore: fix typo

* refactor: rename TrustedCAFile to CACertFile

* docs: add comments

* fix: missing tls registration

* feat: add InsecureSkipVerify config for testing

zrpc/config.go

@@ -83,6 +83,12 @@ func (cc RpcClientConf) BuildTarget() (string, error) {
 	if cc.Etcd.HasAccount() {
 		discov.RegisterAccount(cc.Etcd.Hosts, cc.Etcd.User, cc.Etcd.Pass)
 	}
+	if cc.Etcd.HasTLS() {
+		if err := discov.RegisterTLS(cc.Etcd.Hosts, cc.Etcd.CertFile, cc.Etcd.CertKeyFile,
+			cc.Etcd.CACertFile, cc.Etcd.InsecureSkipVerify); err != nil {
+			return "", err
+		}
+	}
 
 	return resolver.BuildDiscovTarget(cc.Etcd.Hosts, cc.Etcd.Key), nil
 }

zrpc/internal/rpcpubserver.go

@@ -21,6 +21,10 @@ func NewRpcPubServer(etcd discov.EtcdConf, listenOn string, opts ...ServerOption
 		if etcd.HasAccount() {
 			pubOpts = append(pubOpts, discov.WithPubEtcdAccount(etcd.User, etcd.Pass))
 		}
+		if etcd.HasTLS() {
+			pubOpts = append(pubOpts, discov.WithPubEtcdTLS(etcd.CertFile, etcd.CertKeyFile,
+				etcd.CACertFile, etcd.InsecureSkipVerify))
+		}
 		pubClient := discov.NewPublisher(etcd.Hosts, etcd.Key, pubListenOn, pubOpts...)
 		return pubClient.KeepAlive()
 	}