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Add interface Tracer, add Opentelemetry (#41963)
* Add interface Tracer, add Opentelemetry * Fix lint * Fix failing tests and return error if config not parsed fo opentelemetry * Update defaults.ini Add comment with jaeger url * go mod tidy * Remove comments that are not needed * Move OpentracingSpan to tracing.go * Add opentelemetry to sample.ini
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| package tracing | ||
|
|
||
| import ( | ||
| "context" | ||
| "time" | ||
|
|
||
| "github.com/grafana/grafana/pkg/infra/log" | ||
| "github.com/grafana/grafana/pkg/setting" | ||
| "go.opentelemetry.io/otel" | ||
| "go.opentelemetry.io/otel/attribute" | ||
| "go.opentelemetry.io/otel/exporters/jaeger" | ||
| "go.opentelemetry.io/otel/sdk/resource" | ||
| tracesdk "go.opentelemetry.io/otel/sdk/trace" | ||
| semconv "go.opentelemetry.io/otel/semconv/v1.4.0" | ||
| trace "go.opentelemetry.io/otel/trace" | ||
| ) | ||
|
|
||
| type Tracer interface { | ||
| Start(ctx context.Context, spanName string, opts ...trace.SpanStartOption) (context.Context, Span) | ||
| Run(context.Context) error | ||
| } | ||
|
|
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| type Span interface { | ||
| End() | ||
| SetAttributes(kv ...attribute.KeyValue) | ||
| } | ||
|
|
||
| var ( | ||
| GlobalTracer trace.Tracer | ||
| ) | ||
|
|
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| type OpentelemetryTracingService struct { | ||
| enabled bool | ||
| address string | ||
| log log.Logger | ||
|
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| tracerProvider *tracesdk.TracerProvider | ||
|
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| Cfg *setting.Cfg | ||
| } | ||
|
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| type OpentelemetrySpan struct { | ||
| span trace.Span | ||
| } | ||
|
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| func (ots *OpentelemetryTracingService) parseSettingsOpentelemetry() error { | ||
| section, err := ots.Cfg.Raw.GetSection("tracing.opentelemetry.jaeger") | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| ots.address = section.Key("address").MustString("") | ||
| if ots.address != "" { | ||
| ots.enabled = true | ||
| } | ||
|
|
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| return nil | ||
| } | ||
|
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| func (ots *OpentelemetryTracingService) initTracerProvider() (*tracesdk.TracerProvider, error) { | ||
| // Create the Jaeger exporter | ||
| exp, err := jaeger.New(jaeger.WithCollectorEndpoint(jaeger.WithEndpoint(ots.address))) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| tp := tracesdk.NewTracerProvider( | ||
| tracesdk.WithBatcher(exp), | ||
| tracesdk.WithResource(resource.NewWithAttributes( | ||
| semconv.SchemaURL, | ||
| semconv.ServiceNameKey.String("grafana"), | ||
| attribute.String("environment", "production"), | ||
| )), | ||
| ) | ||
|
|
||
| return tp, nil | ||
| } | ||
|
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| func (ots *OpentelemetryTracingService) initOpentelemetryTracer() error { | ||
| tp, err := ots.initTracerProvider() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| // Register our TracerProvider as the global so any imported | ||
| // instrumentation in the future will default to using it | ||
| // only if tracing is enabled | ||
| if ots.enabled { | ||
| otel.SetTracerProvider(tp) | ||
| } | ||
|
|
||
| ots.tracerProvider = tp | ||
| GlobalTracer = otel.GetTracerProvider().Tracer("component-main") | ||
|
|
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| return nil | ||
| } | ||
|
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| func (ots *OpentelemetryTracingService) Run(ctx context.Context) error { | ||
| <-ctx.Done() | ||
|
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| ots.log.Info("Closing tracing") | ||
| ctxShutdown, cancel := context.WithTimeout(ctx, time.Second*5) | ||
| defer cancel() | ||
|
|
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| if err := ots.tracerProvider.Shutdown(ctxShutdown); err != nil { | ||
| return err | ||
| } | ||
|
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| return nil | ||
| } | ||
|
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| func (ots *OpentelemetryTracingService) Start(ctx context.Context, spanName string, opts ...trace.SpanStartOption) (context.Context, Span) { | ||
| ctx, span := GlobalTracer.Start(ctx, spanName) | ||
| oSpan := OpentelemetrySpan{span: span} | ||
| return ctx, oSpan | ||
| } | ||
|
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| func (s OpentelemetrySpan) End() { | ||
| s.span.End() | ||
| } | ||
|
|
||
| func (s OpentelemetrySpan) SetAttributes(kv ...attribute.KeyValue) { | ||
| s.span.SetAttributes(kv...) | ||
| } |
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