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
15package v3rpc
16
17import (
18	"crypto/tls"
19	"math"
20
21	"github.com/coreos/etcd/etcdserver"
22	pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
23
24	"github.com/grpc-ecosystem/go-grpc-middleware"
25	"github.com/grpc-ecosystem/go-grpc-prometheus"
26	"google.golang.org/grpc"
27	"google.golang.org/grpc/credentials"
28	"google.golang.org/grpc/health"
29	healthpb "google.golang.org/grpc/health/grpc_health_v1"
30)
31
32const (
33	grpcOverheadBytes = 512 * 1024
34	maxStreams        = math.MaxUint32
35	maxSendBytes      = math.MaxInt32
36)
37
38func Server(s *etcdserver.EtcdServer, tls *tls.Config, gopts ...grpc.ServerOption) *grpc.Server {
39	var opts []grpc.ServerOption
40	opts = append(opts, grpc.CustomCodec(&codec{}))
41	if tls != nil {
42		opts = append(opts, grpc.Creds(credentials.NewTLS(tls)))
43	}
44	opts = append(opts, grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(
45		newLogUnaryInterceptor(s),
46		newUnaryInterceptor(s),
47		grpc_prometheus.UnaryServerInterceptor,
48	)))
49	opts = append(opts, grpc.StreamInterceptor(grpc_middleware.ChainStreamServer(
50		newStreamInterceptor(s),
51		grpc_prometheus.StreamServerInterceptor,
52	)))
53	opts = append(opts, grpc.MaxRecvMsgSize(int(s.Cfg.MaxRequestBytes+grpcOverheadBytes)))
54	opts = append(opts, grpc.MaxSendMsgSize(maxSendBytes))
55	opts = append(opts, grpc.MaxConcurrentStreams(maxStreams))
56	grpcServer := grpc.NewServer(append(opts, gopts...)...)
57
58	pb.RegisterKVServer(grpcServer, NewQuotaKVServer(s))
59	pb.RegisterWatchServer(grpcServer, NewWatchServer(s))
60	pb.RegisterLeaseServer(grpcServer, NewQuotaLeaseServer(s))
61	pb.RegisterClusterServer(grpcServer, NewClusterServer(s))
62	pb.RegisterAuthServer(grpcServer, NewAuthServer(s))
63	pb.RegisterMaintenanceServer(grpcServer, NewMaintenanceServer(s))
64
65	// server should register all the services manually
66	// use empty service name for all etcd services' health status,
67	// see https://github.com/grpc/grpc/blob/master/doc/health-checking.md for more
68	hsrv := health.NewServer()
69	hsrv.SetServingStatus("", healthpb.HealthCheckResponse_SERVING)
70	healthpb.RegisterHealthServer(grpcServer, hsrv)
71
72	// set zero values for metrics registered for this grpc server
73	grpc_prometheus.Register(grpcServer)
74
75	return grpcServer
76}
77