improve grpc lifecycle

pkg/app/app.go

@@ -17,6 +17,8 @@ func (a *App) Done() <-chan any {
 func (a *App) MustRun() {
 	if a.cfg != nil {
 		panic(errors.New("already ran app trying to run"))
+	} else if !a.cfg.HTTP.Enabled && !a.cfg.GRPC.Enabled {
+		panic(errors.New("neither http nor grpc enabled, nothing to do"))
 	}
 
 	// Set up app
@@ -36,20 +38,24 @@ func (a *App) MustRun() {
 	defer initSpan.End()
 
 	// Start HTTP (does not block)
+	if a.cfg.HTTP.Enabled {
 		if err := a.initHTTP(ctx); err != nil {
 			initSpan.RecordError(err)
 			initSpan.SetStatus(codes.Error, err.Error())
 		}
 		initSpan.AddEvent("http server started")
 		initSpan.SetAttributes(attribute.Int("http.handlers", len(a.HTTP.Funcs)))
+	}
 
 	// Start GRPC (does not block)
+	if a.cfg.GRPC.Enabled {
 		if err := a.initGRPC(ctx); err != nil {
 			initSpan.RecordError(err)
 			initSpan.SetStatus(codes.Error, err.Error())
 		}
 		initSpan.AddEvent("grpc server started")
 		initSpan.SetAttributes(attribute.Int("grpc.services", len(a.GRPC.Services)))
+	}
 
 	// Monitor app lifecycle
 	go a.run()

pkg/srv/grpc/grpc.go

@@ -62,6 +62,8 @@ func InitGRPCServer(ctx context.Context, opts *opts.GRPCOpts) (
 		return nil, nil, err
 	}
 
+	appGRPC.logger.Debug().Msg("GRPC Server Started")
+
 	span.SetStatus(codes.Ok, "")
 	return appGRPC.shutdownFunc, appGRPC.doneChan, nil
 }

pkg/srv/grpc/grpc_run.go

@@ -56,8 +56,11 @@ func (a *appGRPCServer) getShutdownFunc() func(context.Context) error {
 
 		select {
 		case <-stoppedChan:
+			a.logger.Warn().Msg("GRPC server shut down gracefully")
 			return nil
 		case <-ctx.Done():
+			a.logger.Warn().Msg("GRPC server shut down hard")
+			a.server.Stop()
 			return ctx.Err()
 		}
 	}