Add OpenTelemetry tracing and log correlation

interface/grpc/server.go

@@ -11,6 +11,7 @@ import (
 
 	ledgerv1 "gl/gen/ledger/v1"
 
+	"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/reflection"
@@ -34,7 +35,7 @@ func Run(ctx context.Context, cfg ServerConfig, handler ledgerv1.GeneralLedgerSe
 func runWithListener(ctx context.Context, shutdownTimeout time.Duration, listener net.Listener, handler ledgerv1.GeneralLedgerServiceServer) error {
 	defer listener.Close()
 
-	server := grpc.NewServer(grpc.ChainUnaryInterceptor(structuredUnaryLogger(), panicRecovery()))
+	server := grpc.NewServer(grpc.StatsHandler(otelgrpc.NewServerHandler()), grpc.ChainUnaryInterceptor(structuredUnaryLogger(), panicRecovery()))
 	ledgerv1.RegisterGeneralLedgerServiceServer(server, handler)
 	reflection.Register(server)
 

interface/web/server.go

@@ -6,6 +6,8 @@ import (
 	"fmt"
 	"net/http"
 	"time"
+
+	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
 )
 
 type ServerConfig struct {
@@ -18,7 +20,7 @@ type ServerConfig struct {
 func Run(ctx context.Context, cfg ServerConfig, handler http.Handler) error {
 	server := &http.Server{
 		Addr:              fmt.Sprintf("%s:%d", cfg.Host, cfg.Port),
-		Handler:           handler,
+		Handler:           otelhttp.NewHandler(handler, "gl-dashboard"),
 		ReadHeaderTimeout: cfg.ReadHeaderTimeout,
 	}
 	serveErr := make(chan error, 1)