[golang] Multiple servers (and clients) over the same (grpc) connection

[r.ki...@gmail.com]

I have two services in my .proto file and I wonder if I can serve them on the same ip:port:

 lis, _ := net.Listen("tcp", ":8000")
 grpcServer := grpc.NewServer()
 pb.RegisterService1Server(grpcServer, &service1Server{})
 pb.RegisterService2Server(grpcServer, &service2Server{})
 grpcServer.Serve(lis)

Is this approach ok?

Also (on a client side) I want to use single connection to a server and call method defined in both services:

conn, _ := grpc.Dial(serverAddr)
cli1 := pb.NewService1Client(conn)
cli2:= pb.NewService2Client(conn)

Would it work?

Thanks a lot.

[mmu...@google.com]

Yes, this should work. 

[Suchismita Sengupta]

Is multiple services equivalent to multiple servers in golang? 

I am trying to create a client with multiple servers in grpc in golang.

Can someone help? I have just started with golang.

[Amit Saha]

On Thursday, June 23, 2022 at 8:45:08 PM UTC+10 Suchismita Sengupta wrote:

Is multiple services equivalent to multiple servers in golang? 

I am trying to create a client with multiple servers in grpc in golang.

Can someone help? I have just started with golang.

Think about it as a gRPC server which is capable of hosting one ore more gRPC services. When you initialise a gRPC server, you can register one or more gRPC services on it and similarly when you write a gRPC client, you can communicate with only one or all of the services registered on the gRPC server. 

An example of a Go server which registers two services along with some tests - they will hopefully help you to write a client as well:

https://github.com/practicalgo/code/tree/master/chap8/multiple-services

Protofbuf: https://github.com/practicalgo/code/tree/master/chap8/multiple-services/service

Server and tests: https://github.com/practicalgo/code/tree/master/chap8/multiple-services/server