Refactor CR metrics

Signed-off-by: Ruben Vargas <ruben.vp8510@gmail.com>

apis/v1beta1/collector_webhook.go

@@ -76,6 +76,7 @@ type CollectorWebhook struct {
 	cfg      config.Config
 	scheme   *runtime.Scheme
 	reviewer *rbac.Reviewer
+	metrics  *Metrics
 }
 
 func (c CollectorWebhook) Default(_ context.Context, obj runtime.Object) error {
@@ -171,10 +172,8 @@ func (c CollectorWebhook) ValidateCreate(ctx context.Context, obj runtime.Object
 	if err != nil {
 		return warnings, err
 	}
-
-	err = IncCounters(ctx, otelcol)
-	if err != nil {
-		return warnings, err
+	if c.metrics != nil {
+		c.metrics.incCounters(ctx, otelcol)
 	}
 
 	return warnings, nil
@@ -196,17 +195,13 @@ func (c CollectorWebhook) ValidateUpdate(ctx context.Context, oldObj, newObj run
 		return warnings, err
 	}
 
-	// Decrease all metrics related to old CR
-	err = DecCounters(ctx, otelcolOld)
-	if err != nil {
-		return warnings, err
+	if c.metrics != nil {
+		// Decrease all metrics related to old CR
+		c.metrics.decCounters(ctx, otelcolOld)
+		// Increase all metrics related to new CR
+		c.metrics.incCounters(ctx, otelcol)
 	}
 
-	// Increase all metrics related to new CR
-	err = IncCounters(ctx, otelcolOld)
-	if err != nil {
-		return warnings, err
-	}
 	return warnings, nil
 }
 
@@ -220,9 +215,9 @@ func (c CollectorWebhook) ValidateDelete(ctx context.Context, obj runtime.Object
 	if err != nil {
 		return warnings, err
 	}
-	err = DecCounters(ctx, otelcol)
-	if err != nil {
-		return warnings, err
+
+	if c.metrics != nil {
+		c.metrics.decCounters(ctx, otelcol)
 	}
 
 	return warnings, nil
@@ -462,12 +457,13 @@ func checkAutoscalerSpec(autoscaler *AutoscalerSpec) error {
 	return nil
 }
 
-func SetupCollectorWebhook(mgr ctrl.Manager, cfg config.Config, reviewer *rbac.Reviewer) error {
+func SetupCollectorWebhook(mgr ctrl.Manager, cfg config.Config, reviewer *rbac.Reviewer, metrics *Metrics) error {
 	cvw := &CollectorWebhook{
 		reviewer: reviewer,
 		logger:   mgr.GetLogger().WithValues("handler", "CollectorWebhook", "version", "v1beta1"),
 		scheme:   mgr.GetScheme(),
 		cfg:      cfg,
+		metrics:  metrics,
 	}
 	return ctrl.NewWebhookManagedBy(mgr).
 		For(&OpenTelemetryCollector{}).

apis/v1beta1/metrics.go

@@ -48,9 +48,16 @@ type components struct {
 	extensions []string
 }
 
+type Metrics struct {
+	modeCounter       metric.Int64UpDownCounter
+	receiversCounter  metric.Int64UpDownCounter
+	exporterCounter   metric.Int64UpDownCounter
+	processorCounter  metric.Int64UpDownCounter
+	extensionsCounter metric.Int64UpDownCounter
+}
+
 // BootstrapMetrics configures the OpenTelemetry meter provider with the Prometheus exporter.
 func BootstrapMetrics() error {
-
 	exporter, err := prometheus.New(prometheus.WithRegisterer(metrics.Registry))
 	if err != nil {
 		return err
@@ -60,6 +67,72 @@ func BootstrapMetrics() error {
 	return err
 }
 
+func NewMetrics() (*Metrics, error) {
+	meter := otel.Meter(meterName)
+	modeCounter, err := meter.Int64UpDownCounter(mode)
+	if err != nil {
+		return nil, err
+	}
+	receiversCounter, err := meter.Int64UpDownCounter(receivers)
+	if err != nil {
+		return nil, err
+	}
+
+	exporterCounter, err := meter.Int64UpDownCounter(exporters)
+	if err != nil {
+		return nil, err
+	}
+
+	processorCounter, err := meter.Int64UpDownCounter(processors)
+	if err != nil {
+		return nil, err
+	}
+
+	extensionsCounter, err := meter.Int64UpDownCounter(extensions)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Metrics{
+		modeCounter:       modeCounter,
+		receiversCounter:  receiversCounter,
+		exporterCounter:   exporterCounter,
+		processorCounter:  processorCounter,
+		extensionsCounter: extensionsCounter,
+	}, nil
+
+}
+
+func (m *Metrics) incCounters(ctx context.Context, collector *OpenTelemetryCollector) {
+	m.updateComponentCounters(ctx, collector, true)
+	m.updateGeneralCRMetricsComponents(ctx, collector, true)
+}
+
+func (m *Metrics) decCounters(ctx context.Context, collector *OpenTelemetryCollector) {
+	m.updateComponentCounters(ctx, collector, false)
+	m.updateGeneralCRMetricsComponents(ctx, collector, false)
+}
+
+func (m *Metrics) updateGeneralCRMetricsComponents(ctx context.Context, collector *OpenTelemetryCollector, up bool) {
+
+	inc := 1
+	if !up {
+		inc = -1
+	}
+	m.modeCounter.Add(ctx, int64(inc), metric.WithAttributes(
+		attribute.Key("collector_name").String(collector.Name),
+		attribute.Key("namespace").String(collector.Namespace),
+		attribute.Key("type").String(string(collector.Spec.Mode)),
+	))
+}
+func (m *Metrics) updateComponentCounters(ctx context.Context, collector *OpenTelemetryCollector, up bool) {
+	components := getComponentsFromConfigV1Beta1(collector.Spec.Config)
+	moveCounter(ctx, collector, components.receivers, m.receiversCounter, up)
+	moveCounter(ctx, collector, components.exporters, m.exporterCounter, up)
+	moveCounter(ctx, collector, components.processors, m.processorCounter, up)
+	moveCounter(ctx, collector, components.extensions, m.extensionsCounter, up)
+}
+
 func extractElements(elements map[string]interface{}) []string {
 	if elements == nil {
 		return []string{}
@@ -94,68 +167,6 @@ func getComponentsFromConfigV1Beta1(yamlContent Config) *components {
 	return info
 }
 
-func IncCounters(ctx context.Context, collector *OpenTelemetryCollector) error {
-	if err := updateComponentCounters(ctx, collector, true); err != nil {
-		return err
-	}
-	return updateGeneralCRMetricsComponents(ctx, collector, true)
-}
-
-func DecCounters(ctx context.Context, collector *OpenTelemetryCollector) error {
-	if err := updateComponentCounters(ctx, collector, false); err != nil {
-		return err
-	}
-	return updateGeneralCRMetricsComponents(ctx, collector, false)
-}
-
-func updateGeneralCRMetricsComponents(ctx context.Context, collector *OpenTelemetryCollector, up bool) error {
-	meter := otel.Meter(meterName)
-	modeCounter, err := meter.Int64UpDownCounter(mode)
-	if err != nil {
-		return err
-	}
-	inc := 1
-	if !up {
-		inc = -1
-	}
-	modeCounter.Add(ctx, int64(inc), metric.WithAttributes(
-		attribute.Key("collector_name").String(collector.Name),
-		attribute.Key("namespace").String(collector.Namespace),
-		attribute.Key("type").String(string(collector.Spec.Mode)),
-	))
-	return nil
-}
-func updateComponentCounters(ctx context.Context, collector *OpenTelemetryCollector, up bool) error {
-	meter := otel.Meter(meterName)
-	receiversCounter, err := meter.Int64UpDownCounter(receivers)
-	if err != nil {
-		return err
-	}
-
-	exporterCounter, err := meter.Int64UpDownCounter(exporters)
-	if err != nil {
-		return err
-	}
-
-	processorCounter, err := meter.Int64UpDownCounter(processors)
-	if err != nil {
-		return err
-	}
-
-	extensionsCounter, err := meter.Int64UpDownCounter(extensions)
-	if err != nil {
-		return err
-	}
-
-	components := getComponentsFromConfigV1Beta1(collector.Spec.Config)
-	moveCounter(ctx, collector, components.receivers, receiversCounter, up)
-	moveCounter(ctx, collector, components.exporters, exporterCounter, up)
-	moveCounter(ctx, collector, components.processors, processorCounter, up)
-	moveCounter(ctx, collector, components.extensions, extensionsCounter, up)
-
-	return nil
-}
-
 func moveCounter(
 	ctx context.Context, collector *OpenTelemetryCollector, types []string, upDown metric.Int64UpDownCounter, up bool) {
 	for _, exporter := range types {

config/manager/kustomization.yaml

@@ -1,8 +1,2 @@
 resources:
 - manager.yaml
-apiVersion: kustomize.config.k8s.io/v1beta1
-kind: Kustomization
-images:
-- name: controller
-  newName: quay.io/rvargasp/opentelemetry-operator
-  newTag: 1714976402.0.0

controllers/suite_test.go

@@ -175,7 +175,7 @@ func TestMain(m *testing.M) {
 	}
 	reviewer := rbac.NewReviewer(clientset)
 
-	if err = v1beta1.SetupCollectorWebhook(mgr, config.New(), reviewer); err != nil {
+	if err = v1beta1.SetupCollectorWebhook(mgr, config.New(), reviewer, nil); err != nil {
 		fmt.Printf("failed to SetupWebhookWithManager: %v", err)
 		os.Exit(1)
 	}

internal/webhook/podmutation/webhookhandler_suite_test.go

@@ -105,7 +105,7 @@ func TestMain(m *testing.M) {
 	}
 	reviewer := rbac.NewReviewer(clientset)
 
-	if err = v1beta1.SetupCollectorWebhook(mgr, config.New(), reviewer); err != nil {
+	if err = v1beta1.SetupCollectorWebhook(mgr, config.New(), reviewer, nil); err != nil {
 		fmt.Printf("failed to SetupWebhookWithManager: %v", err)
 		os.Exit(1)
 	}

main.go

@@ -155,7 +155,7 @@ func main() {
 	pflag.BoolVar(&enableNginxInstrumentation, constants.FlagNginx, false, "Controls whether the operator supports nginx auto-instrumentation")
 	pflag.BoolVar(&enableNodeJSInstrumentation, constants.FlagNodeJS, true, "Controls whether the operator supports nodejs auto-instrumentation")
 	pflag.BoolVar(&enableJavaInstrumentation, constants.FlagJava, true, "Controls whether the operator supports java auto-instrumentation")
-	pflag.BoolVar(&enableCRMetrics, constants.FlagCRMetrics, false, "Controls whether the CR metrics is enabled")
+	pflag.BoolVar(&enableCRMetrics, constants.FlagCRMetrics, true, "Controls whether the CR metrics is enabled")
 
 	stringFlagOrEnv(&collectorImage, "collector-image", "RELATED_IMAGE_COLLECTOR", fmt.Sprintf("ghcr.io/open-telemetry/opentelemetry-collector-releases/opentelemetry-collector:%s", v.OpenTelemetryCollector), "The default OpenTelemetry collector image. This image is used when no image is specified in the CustomResource.")
 	stringFlagOrEnv(&targetAllocatorImage, "target-allocator-image", "RELATED_IMAGE_TARGET_ALLOCATOR", fmt.Sprintf("ghcr.io/open-telemetry/opentelemetry-operator/target-allocator:%s", v.TargetAllocator), "The default OpenTelemetry target allocator image. This image is used when no image is specified in the CustomResource.")
@@ -337,12 +337,6 @@ func main() {
 		}
 	}
 
-	if enableCRMetrics {
-		if metricsErr := otelv1beta1.BootstrapMetrics(); metricsErr != nil {
-			setupLog.Error(metricsErr, "Error bootstrapping CRD metrics")
-		}
-	}
-
 	if cfg.LabelsFilter() != nil {
 		for _, basePattern := range cfg.LabelsFilter() {
 			_, compileErr := regexp.Compile(basePattern)
@@ -381,7 +375,19 @@ func main() {
 	}
 
 	if os.Getenv("ENABLE_WEBHOOKS") != "false" {
-		if err = otelv1beta1.SetupCollectorWebhook(mgr, cfg, reviewer); err != nil {
+		var crdMetrics *otelv1beta1.Metrics
+
+		if enableCRMetrics {
+			if metricsErr := otelv1beta1.BootstrapMetrics(); metricsErr != nil {
+				setupLog.Error(metricsErr, "Error bootstrapping CRD metrics")
+			}
+			crdMetrics, err = otelv1beta1.NewMetrics()
+			if err != nil {
+				setupLog.Error(err, "Error bootstrapping CRD metrics")
+			}
+		}
+
+		if err = otelv1beta1.SetupCollectorWebhook(mgr, cfg, reviewer, crdMetrics); err != nil {
 			setupLog.Error(err, "unable to create webhook", "webhook", "OpenTelemetryCollector")
 			os.Exit(1)
 		}

pkg/collector/upgrade/suite_test.go

@@ -105,7 +105,7 @@ func TestMain(m *testing.M) {
 	}
 	reviewer := rbac.NewReviewer(clientset)
 
-	if err = v1beta1.SetupCollectorWebhook(mgr, config.New(), reviewer); err != nil {
+	if err = v1beta1.SetupCollectorWebhook(mgr, config.New(), reviewer, nil); err != nil {
 		fmt.Printf("failed to SetupWebhookWithManager: %v", err)
 		os.Exit(1)
 	}