Simple IM Server

• Vendor go-micro and micro
• Pure golang grpc client, in addition to pure HTTP client
  • Services are exposed via api using HTTP
  • Could add another API gateway as grpc reverse proxy (TODO)
  • SIMS can be started with bind address
• Simplified proto naming
• Reliable publishing: error correct and tracable
• add go-micro & grpc debugging and tracing
• Real world deployment
• Performance testing
  • Preliminary conclusion: memory bound: 1G mem ~ 10k user
• Authentication at API gateway with wechat
• Authorization on event publishing

Directory Layout

• bin/ build output
• client/ client SDKs
  • . go-micro client for easy testing
  • go golang sdk
  • js typescript sdk
  • java java sdk
• pkg/ reusable lib
  • codec ???
  • grpcproxy grpc transparent reverse proxy
  • go-micro modified go-micro base on v2.9.1
• proto/ protobuf definitions
• pub/ event publisher
• server/ the sims server
• micro/ the micro cli (modified)
• tools/ dependent tools
  • bin protoc-gen-go protoc-gen-micro micro

Debugging

1. Start server with --pprof_address 127.0.0.1:6060
2. look for
   • http://127.0.0.1:6060/debug/pprof/
   • http://127.0.0.1:6060/debug/requests
   • http://127.0.0.1:6060/debug/events
3. micro debug interface
   • micro call go.micro.srv.sims Debug.Health
   • micro call go.micro.srv.sims Debug.Stats
   • micro call go.micro.srv.sims Debug.Cache
4. start with debug level logging
   • MICRO_LOG_LEVEL=debug bin/server --server_address :18080 --pprof_address :6060
   • MICRO_LOG_LEVEL=debug ./micro api --type srv