when recording the admission/conversion duration use the attributes from the labeler

webhook/admission.go

@@ -33,7 +33,6 @@ import (
 	"knative.dev/pkg/logging/logkey"
 
 	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
-	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/metric"
 )
 
@@ -106,16 +105,14 @@ func admissionHandler(wh *Webhook, c AdmissionController, synced <-chan struct{}
 
 		labeler, _ := otelhttp.LabelerFromContext(r.Context())
 
-		attrs := []attribute.KeyValue{
+		labeler.Add(
 			AdmissionKind.With(review.Request.Kind.Kind),
 			AdmissionGroup.With(review.Request.Kind.Group),
 			AdmissionVersion.With(review.Request.Kind.Version),
 			AdmissionOperation.With(string(review.Request.Operation)),
 			AdmissionSubresource.With(review.Request.SubResource),
 			webhookTypeAttr,
-		}
+		)
-
-		labeler.Add(attrs...)
 
 		logger = logger.With(
 			logkey.Kind, review.Request.Kind.String(),
@@ -146,12 +143,11 @@ func admissionHandler(wh *Webhook, c AdmissionController, synced <-chan struct{}
 		}
 
 		allowedAttr := AdmissionAllowed.With(reviewResponse.Allowed)
-		attrs = append(attrs, allowedAttr)
 		labeler.Add(allowedAttr)
 
 		wh.metrics.recordHandlerDuration(ctx,
 			time.Since(ttStart),
-			metric.WithAttributes(attrs...),
+			metric.WithAttributes(labeler.Get()...),
 		)
 
 		if !reviewResponse.Allowed || reviewResponse.PatchType != nil || response.Response == nil {

webhook/conversion.go

@@ -54,10 +54,11 @@ func conversionHandler(wh *Webhook, c ConversionController) http.HandlerFunc {
 			return
 		}
 
-		versionAttr := ConversionDesiredAPIVersion.With(review.Request.DesiredAPIVersion)
-
 		labeler, _ := otelhttp.LabelerFromContext(r.Context())
-		labeler.Add(webhookTypeAttr, versionAttr)
+		labeler.Add(
+			webhookTypeAttr,
+			ConversionDesiredAPIVersion.With(review.Request.DesiredAPIVersion),
+		)
 
 		logger = logger.With(
 			zap.String("uid", string(review.Request.UID)),
@@ -76,18 +77,14 @@ func conversionHandler(wh *Webhook, c ConversionController) http.HandlerFunc {
 			Response: c.Convert(ctx, review.Request),
 		}
 
-		wh.metrics.recordHandlerDuration(ctx, time.Since(ttStart),
-			metric.WithAttributes(
-				versionAttr,
-				webhookTypeAttr,
-				ConversionResultStatus.With(strings.ToLower(response.Response.Result.Status)),
-			),
-		)
-
 		labeler.Add(
 			ConversionResultStatus.With(strings.ToLower(response.Response.Result.Status)),
 		)
 
+		wh.metrics.recordHandlerDuration(ctx, time.Since(ttStart),
+			metric.WithAttributes(labeler.Get()...),
+		)
+
 		if err := json.NewEncoder(w).Encode(response); err != nil {
 			http.Error(w, fmt.Sprint("could not encode response:", err), http.StatusInternalServerError)
 			return