grpcproxy: add maintenance proxy

etcdmain/grpc_proxy.go

@@ -91,12 +91,14 @@ func startGRPCProxy(cmd *cobra.Command, args []string) {
 	watchp := grpcproxy.NewWatchProxy(client)
 	clusterp := grpcproxy.NewClusterProxy(client)
 	leasep := grpcproxy.NewLeaseProxy(client)
+	mainp := grpcproxy.NewMaintenanceProxy(client)
 
 	server := grpc.NewServer()
 	pb.RegisterKVServer(server, kvp)
 	pb.RegisterWatchServer(server, watchp)
 	pb.RegisterClusterServer(server, clusterp)
 	pb.RegisterLeaseServer(server, leasep)
+	pb.RegisterMaintenanceServer(server, mainp)
 
 	server.Serve(l)
 }

proxy/grpcproxy/maintenance.go

@@ -0,0 +1,74 @@
+// Copyright 2016 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 grpcproxy
+
+import (
+	"golang.org/x/net/context"
+
+	"github.com/coreos/etcd/clientv3"
+	pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
+)
+
+type maintenanceProxy struct {
+	client *clientv3.Client
+}
+
+func NewMaintenanceProxy(c *clientv3.Client) pb.MaintenanceServer {
+	return &maintenanceProxy{
+		client: c,
+	}
+}
+
+func (mp *maintenanceProxy) Defragment(ctx context.Context, dr *pb.DefragmentRequest) (*pb.DefragmentResponse, error) {
+	conn := mp.client.ActiveConnection()
+	return pb.NewMaintenanceClient(conn).Defragment(ctx, dr)
+}
+
+func (mp *maintenanceProxy) Snapshot(sr *pb.SnapshotRequest, stream pb.Maintenance_SnapshotServer) error {
+	conn := mp.client.ActiveConnection()
+	ctx, cancel := context.WithCancel(stream.Context())
+	defer cancel()
+
+	sc, err := pb.NewMaintenanceClient(conn).Snapshot(ctx, sr)
+	if err != nil {
+		return err
+	}
+
+	for {
+		rr, err := sc.Recv()
+		if err != nil {
+			return err
+		}
+		err = stream.Send(rr)
+		if err != nil {
+			return err
+		}
+	}
+}
+
+func (mp *maintenanceProxy) Hash(ctx context.Context, r *pb.HashRequest) (*pb.HashResponse, error) {
+	conn := mp.client.ActiveConnection()
+	return pb.NewMaintenanceClient(conn).Hash(ctx, r)
+}
+
+func (mp *maintenanceProxy) Alarm(ctx context.Context, r *pb.AlarmRequest) (*pb.AlarmResponse, error) {
+	conn := mp.client.ActiveConnection()
+	return pb.NewMaintenanceClient(conn).Alarm(ctx, r)
+}
+
+func (mp *maintenanceProxy) Status(ctx context.Context, r *pb.StatusRequest) (*pb.StatusResponse, error) {
+	conn := mp.client.ActiveConnection()
+	return pb.NewMaintenanceClient(conn).Status(ctx, r)
+}