Tracing (#156)

pkg/tracing/opentracing.go

@@ -0,0 +1,25 @@
+package tracing
+
+import (
+	"io"
+
+	"github.com/micro/micro/v3/service/config"
+	"github.com/micro/micro/v3/service/logger"
+	"github.com/micro/micro/v3/util/opentelemetry"
+	"github.com/micro/micro/v3/util/opentelemetry/jaeger"
+)
+
+func SetupOpentracing(serviceName string) io.Closer {
+	c, _ := config.Get("jaegeraddress")
+	openTracer, closer, err := jaeger.New(
+		opentelemetry.WithServiceName(serviceName),
+		opentelemetry.WithTraceReporterAddress(c.String("localhost:6831")),
+	)
+	if err != nil {
+		logger.Fatalf("Error configuring opentracing: %v", err)
+	}
+	logger.Infof("Configured jaeger to %s", c.String("localhost:6831"))
+
+	opentelemetry.DefaultOpenTracer = openTracer
+	return closer
+}