feat(tracing): inject comp ID as instru scope attr (#5286)

Signed-off-by: hainenber <[email protected]>

CHANGELOG.md

@@ -204,6 +204,8 @@ v0.37.0 (2023-10-10)
 - Fix initialization of the RAPL collector for the node_exporter integration
   and the prometheus.exporter.unix component. (@marctc)
 
+- Set instrumentation scope attribute for traces emitted by Flow component. (@hainenber)
+
 ### Other changes
 
 - Use Go 1.21.1 for builds. (@rfratto)

pkg/flow/tracing/wrap_tracer.go

@@ -2,6 +2,8 @@ package tracing
 
 import (
 	"context"
+	"path/filepath"
+	"strings"
 
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/trace"
@@ -41,6 +43,12 @@ type wrappedProvider struct {
 var _ trace.TracerProvider = (*wrappedProvider)(nil)
 
 func (wp *wrappedProvider) Tracer(name string, options ...trace.TracerOption) trace.Tracer {
+	// Inject the component name as instrumentation scope attribute.
+	// This would not have component's exact ID, aligning with OTEL's definition
+	if wp.id != "" {
+		otelComponentName := strings.TrimSuffix(wp.id, filepath.Ext(wp.id))
+		options = append(options, trace.WithInstrumentationAttributes(attribute.String(wp.spanName, otelComponentName)))
+	}
 	innerTracer := wp.inner.Tracer(name, options...)
 	return &wrappedTracer{
 		inner:    innerTracer,