makes jaeger tracing configurable

pkg/cmd/grafana-server/server.go

@@ -24,10 +24,7 @@ import (
 	"github.com/grafana/grafana/pkg/services/search"
 	"github.com/grafana/grafana/pkg/setting"
 	"github.com/grafana/grafana/pkg/social"
-	opentracing "github.com/opentracing/opentracing-go"
-	jaeger "github.com/uber/jaeger-client-go"
-	jaegercfg "github.com/uber/jaeger-client-go/config"
-	jaegerlog "github.com/uber/jaeger-client-go/log"
+	"github.com/grafana/grafana/pkg/tracing"
 )
 
 func NewGrafanaServer() models.GrafanaServer {
@@ -65,33 +62,12 @@ func (g *GrafanaServerImpl) Start() {
 	eventpublisher.Init()
 	plugins.Init()
 
-	//localhost:5775
-
-	cfg := jaegercfg.Configuration{
-		Disabled: false,
-		Sampler: &jaegercfg.SamplerConfig{
-			Type:  jaeger.SamplerTypeConst,
-			Param: 1,
-		},
-		Reporter: &jaegercfg.ReporterConfig{
-			LogSpans:           false,
-			LocalAgentHostPort: "localhost:5775",
-		},
-	}
-
-	jLogger := jaegerlog.StdLogger
-
-	tracer, closer, err := cfg.New(
-		"grafana",
-		jaegercfg.Logger(jLogger),
-	)
+	closer, err := tracing.Init(setting.Cfg)
 	if err != nil {
-		g.log.Error("tracing", "error", err)
+		g.log.Error("Tracing settings is not valid", "error", err)
 		g.Shutdown(1, "Startup failed")
 		return
 	}
-
-	opentracing.InitGlobalTracer(tracer)
 	defer closer.Close()
 
 	// init alerting
@@ -104,7 +80,7 @@ func (g *GrafanaServerImpl) Start() {
 	cleanUpService := cleanup.NewCleanUpService()
 	g.childRoutines.Go(func() error { return cleanUpService.Run(g.context) })
 
-	if err := notifications.Init(); err != nil {
+	if err = notifications.Init(); err != nil {
 		g.log.Error("Notification service failed to initialize", "error", err)
 		g.Shutdown(1, "Startup failed")
 		return