rest otel support (#943)

core/opentelemetry/agent.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/tal-tech/go-zero/core/logx"
 	"github.com/tal-tech/go-zero/core/syncx"
+
 	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/exporters/jaeger"
 	"go.opentelemetry.io/otel/propagation"
@@ -53,7 +54,17 @@ func StartAgent(c Config) {
 
 		otel.SetTracerProvider(tp)
 		otel.SetTextMapPropagator(propagation.NewCompositeTextMapPropagator(propagation.TraceContext{}, propagation.Baggage{}))
+		otel.SetErrorHandler(otelErrHandler{})
 
 		enabled.Set(true)
 	})
 }
+
+// errHandler handing otel errors.
+type otelErrHandler struct{}
+
+var _ otel.ErrorHandler = otelErrHandler{}
+
+func (o otelErrHandler) Handle(err error) {
+	logx.Errorf("[otel] error: %v", err)
+}

core/opentelemetry/config.go

@@ -1,8 +1,6 @@
 package opentelemetry
 
-const (
-	TraceName = "go-zero"
-)
+const TraceName = "go-zero"
 
 // A Config is a opentelemetry config.
 type Config struct {

core/service/serviceconf.go

@@ -45,6 +45,9 @@ func (sc ServiceConf) SetUp() error {
 	if len(sc.Log.ServiceName) == 0 {
 		sc.Log.ServiceName = sc.Name
 	}
+	if len(sc.OpenTelemetry.Name) == 0 {
+		sc.OpenTelemetry.Name = sc.Name
+	}
 	if err := logx.SetUp(sc.Log); err != nil {
 		return err
 	}