Use service name for the Tracer

tracing/tracing.go

@@ -83,7 +83,7 @@ func getServiceName() string {
 // We need to check the configuration as soon as possible, because
 // it's likely that client transports are created before HTTP servers,
 // and we need to wrap them with opencensus at creation time.
-func initTracing(endpointAddr string) {
+func initTracing(serviceName string) {
 	initOnce.Do(func() {
 		// Kill switch from environment.
 		if s := os.Getenv("TRACING_ENABLE"); s == "0" {
@@ -122,7 +122,7 @@ func initTracing(endpointAddr string) {
 		)
 
 		otel.SetTracerProvider(tp)
-		Tracer = tp.Tracer(endpointAddr)
+		Tracer = tp.Tracer(serviceName)
 
 		log.Printf("tracing enabled (report_url %s)", config.ReportURL)
 
@@ -148,8 +148,9 @@ func WrapTransport(t http.RoundTripper) http.RoundTripper {
 // functionality, if globally enabled. Automatically calls Init().
 func WrapHandler(h http.Handler, endpointAddr string) http.Handler {
 	if Enabled {
-		initTracing(endpointAddr)
-		h = othttp.NewHandler(h, getServiceName())
+		serviceName := getServiceName()
+		initTracing(serviceName)
+		h = othttp.NewHandler(h, serviceName)
 	}
 	return h
 }