[root@localhost ~]# yum -y install autoconf automake libtool curl make g++ unzip 
[root@localhost ~]# unzip protobuf-master.zip 
[root@localhost ~]# cd protobuf-master 

[root@localhost protobuf-master]# ./autogen.sh 
[root@localhost protobuf-master]# ./configure 

[root@localhost protobuf-master]# ./configure --prefix=/usr/local/protobuf 
[root@localhost protobuf-master]# make
[root@localhost protobuf-master]# make check
[root@localhost protobuf-master]# make install 
[root@localhost protobuf-master]# ldconfig # refresh shared library cache. 

[root@localhost protobuf-master]# protoc -I=./ --cpp_out=./ test.proto

go get -u github.com/golang/protobuf/{proto,protoc-gen-go}
go get -u google.golang.org/grpc
protoc --go_out=plugins=grpc:. *.proto

syntax = "proto3";

package rpc_package;

// define a service
service HelloWorldService {
 // define the interface and data type
 rpc SayHello (HelloRequest) returns (HelloReply) {}
}

// define the data type of request
message HelloRequest {
 string name = 1;
}

// define the data type of response
message HelloReply {
 string message = 1;
}

protoc --go_out=plugins=grpc:. helloworld.proto

// server.go
 
import (
 "log"
 "net"
 
 "golang.org/x/net/context"
 "google.golang.org/grpc"
 pb "helloworld/helloworld"
)
 
const (
 port = ":50051"
)
 
type server struct {}
 
func (s *server) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
 return &pb.HelloReply{Message: "Hello " + in.Name}, nil
}
 
func main() {
 lis, err := net.Listen("tcp", port)
 if err != nil {
  log.Fatal("failed to listen: %v", err)
 }
 s := grpc.NewServer()
 pb.RegisterGreeterServer(s, &server{})
 s.Serve(lis)
}

package main
 
//client.go
 
import (
 "log"
 "os"
 
 "golang.org/x/net/context"
 "google.golang.org/grpc"
 pb "helloworld/helloworld"
)
 
const (
 address  = "localhost:50051"
 defaultName = "world"
)
 
func main() {
 conn, err := grpc.Dial(address, grpc.WithInsecure())
 if err != nil {
  log.Fatal("did not connect: %v", err)
 }
 defer conn.Close()
 c := pb.NewGreeterClient(conn)
 
 name := defaultName
 if len(os.Args) >1 {
  name = os.Args[1]
 }
 r, err := c.SayHello(context.Background(), &pb.HelloRequest{Name: name})
 if err != nil {
  log.Fatal("could not greet: %v", err)
 }
 log.Printf("Greeting: %s", r.Message)
}