be9/dual-grpc-go

gRPC-Go dual client PoC

Intro

This repo contains a primitive gRPC server with 2 methods and a dual client PoC.

The dual client dispatches connections to either a grpc-go 1.53.0 client, or to this client, forked from grpc-go 1.54.0

Run

1. Run make server.
2. Run make client in a different console.
3. Check the server output:

   2023/04/25 15:36:22 gRPC server listening at [::]:50051
   2023/04/25 15:36:22 Starting HTTP at :50052
    
   2023/04/25 15:36:28 GetFoos [agent grpc-go/1.53.0]
   2023/04/25 15:36:28 GetFoos [agent grpc-go/1.54.0]
   2023/04/25 15:36:28 GetFoos [agent grpc-go/1.53.0]
   2023/04/25 15:36:28 GetFoos [agent grpc-go/1.54.0]
   2023/04/25 15:36:28 GetFoos [agent grpc-go/1.53.0]
   2023/04/25 15:36:28 GetFoos [agent grpc-go/1.53.0]
   2023/04/25 15:36:28 GetFoos [agent grpc-go/1.54.0]
   2023/04/25 15:36:28 GetFoos [agent grpc-go/1.54.0]
   2023/04/25 15:36:28 GetFoos [agent grpc-go/1.53.0]
   2023/04/25 15:36:28 GetFoos [agent grpc-go/1.53.0]
   

Nuances

1. The fork needs to be adapted
   • Create a branch based on the upstream go-grpc release.
   • Rename the module in go.mod.
   • go install github.com/sirkon/go-imports-rename@latest
   • go-imports-rename --save 'google.golang.org/grpc => github.com/be9/grpc-go'
   • Disable duplicate proto registration (binarylog/grpc_binarylog_v1/binarylog.pb.go).
2. The dual client cannot pass opts to the second client because the type is different.