use the otel opencensus bridge

.chloggen/codeboten_oc-bridge.yaml

@@ -0,0 +1,16 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: service
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: use the otel opencensus bridge when telemetry.useOtelForInternalMetrics is enabled
+
+# One or more tracking issues or pull requests related to the change
+issues: [7483]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:

cmd/otelcorecol/go.mod

@@ -77,6 +77,7 @@ require (
 	go.opentelemetry.io/contrib/propagators/b3 v1.15.0 // indirect
 	go.opentelemetry.io/contrib/zpages v0.40.0 // indirect
 	go.opentelemetry.io/otel v1.14.0 // indirect
+	go.opentelemetry.io/otel/bridge/opencensus v0.37.0 // indirect
 	go.opentelemetry.io/otel/exporters/prometheus v0.37.0 // indirect
 	go.opentelemetry.io/otel/metric v0.37.0 // indirect
 	go.opentelemetry.io/otel/sdk v1.14.0 // indirect

cmd/otelcorecol/go.sum

@@ -435,6 +435,8 @@ go.opentelemetry.io/contrib/zpages v0.40.0 h1:BDLYzPHju8GRJH2V+0CtF4WF/sDnylZnsp
 go.opentelemetry.io/contrib/zpages v0.40.0/go.mod h1:hKOEjOa1AA8kbqQRWR5gSj4WrjWjHQMFv5jeRGDgVRM=
 go.opentelemetry.io/otel v1.14.0 h1:/79Huy8wbf5DnIPhemGB+zEPVwnN6fuQybr/SRXa6hM=
 go.opentelemetry.io/otel v1.14.0/go.mod h1:o4buv+dJzx8rohcUeRmWUZhqupFvzWis188WlggnNeU=
+go.opentelemetry.io/otel/bridge/opencensus v0.37.0 h1:ieH3gw7b1eg90ARsFAlAsX5LKVZgnCYfaDwRrK6xLHU=
+go.opentelemetry.io/otel/bridge/opencensus v0.37.0/go.mod h1:ddiK+1PE68l/Xk04BGTh9Y6WIcxcLrmcVxVlS0w5WZ0=
 go.opentelemetry.io/otel/exporters/prometheus v0.37.0 h1:NQc0epfL0xItsmGgSXgfbH2C1fq2VLXkZoDFsfRNHpc=
 go.opentelemetry.io/otel/exporters/prometheus v0.37.0/go.mod h1:hB8qWjsStK36t50/R0V2ULFb4u95X/Q6zupXLgvjTh8=
 go.opentelemetry.io/otel/metric v0.37.0 h1:pHDQuLQOZwYD+Km0eb657A25NaRzy0a+eLyKfDXedEs=

go.mod

@@ -30,6 +30,7 @@ require (
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.40.0
 	go.opentelemetry.io/contrib/propagators/b3 v1.15.0
 	go.opentelemetry.io/otel v1.14.0
+	go.opentelemetry.io/otel/bridge/opencensus v0.37.0
 	go.opentelemetry.io/otel/exporters/prometheus v0.37.0
 	go.opentelemetry.io/otel/metric v0.37.0
 	go.opentelemetry.io/otel/sdk v1.14.0

go.sum

@@ -434,6 +434,8 @@ go.opentelemetry.io/contrib/zpages v0.40.0 h1:BDLYzPHju8GRJH2V+0CtF4WF/sDnylZnsp
 go.opentelemetry.io/contrib/zpages v0.40.0/go.mod h1:hKOEjOa1AA8kbqQRWR5gSj4WrjWjHQMFv5jeRGDgVRM=
 go.opentelemetry.io/otel v1.14.0 h1:/79Huy8wbf5DnIPhemGB+zEPVwnN6fuQybr/SRXa6hM=
 go.opentelemetry.io/otel v1.14.0/go.mod h1:o4buv+dJzx8rohcUeRmWUZhqupFvzWis188WlggnNeU=
+go.opentelemetry.io/otel/bridge/opencensus v0.37.0 h1:ieH3gw7b1eg90ARsFAlAsX5LKVZgnCYfaDwRrK6xLHU=
+go.opentelemetry.io/otel/bridge/opencensus v0.37.0/go.mod h1:ddiK+1PE68l/Xk04BGTh9Y6WIcxcLrmcVxVlS0w5WZ0=
 go.opentelemetry.io/otel/exporters/prometheus v0.37.0 h1:NQc0epfL0xItsmGgSXgfbH2C1fq2VLXkZoDFsfRNHpc=
 go.opentelemetry.io/otel/exporters/prometheus v0.37.0/go.mod h1:hB8qWjsStK36t50/R0V2ULFb4u95X/Q6zupXLgvjTh8=
 go.opentelemetry.io/otel/metric v0.37.0 h1:pHDQuLQOZwYD+Km0eb657A25NaRzy0a+eLyKfDXedEs=

service/telemetry.go

@@ -32,6 +32,7 @@ import (
 	"go.opentelemetry.io/contrib/propagators/b3"
 	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/bridge/opencensus"
 	otelprom "go.opentelemetry.io/otel/exporters/prometheus"
 	"go.opentelemetry.io/otel/metric"
 	"go.opentelemetry.io/otel/propagation"
@@ -107,10 +108,10 @@ func (tel *telemetryInitializer) init(buildInfo component.BuildInfo, logger *zap
 		if err := tel.initOpenTelemetry(telAttrs, promRegistry); err != nil {
 			return err
 		}
-	}
-
-	if err := tel.initOpenCensus(cfg, telAttrs, promRegistry); err != nil {
-		return err
+	} else {
+		if err := tel.initOpenCensus(cfg, telAttrs, promRegistry); err != nil {
+			return err
+		}
 	}
 
 	logger.Info(
@@ -200,6 +201,7 @@ func (tel *telemetryInitializer) initOpenCensus(cfg telemetry.Config, telAttrs m
 func (tel *telemetryInitializer) initOpenTelemetry(attrs map[string]string, promRegistry prometheus.Registerer) error {
 	// Initialize the ocRegistry, still used by the process metrics.
 	tel.ocRegistry = ocmetric.NewRegistry()
+	metricproducer.GlobalManager().AddProducer(tel.ocRegistry)
 
 	var resAttrs []attribute.KeyValue
 	for k, v := range attrs {
@@ -223,6 +225,7 @@ func (tel *telemetryInitializer) initOpenTelemetry(attrs map[string]string, prom
 	if err != nil {
 		return fmt.Errorf("error creating otel prometheus exporter: %w", err)
 	}
+	exporter.RegisterProducer(opencensus.NewMetricProducer())
 	tel.mp = sdkmetric.NewMeterProvider(
 		sdkmetric.WithResource(res),
 		sdkmetric.WithReader(exporter),

service/telemetry_test.go

@@ -117,13 +117,9 @@ func TestTelemetryInit(t *testing.T) {
 			name:    "UseOpenTelemetryForInternalMetrics",
 			useOtel: true,
 			expectedMetrics: map[string]metricValue{
-				metricPrefix + ocPrefix + counterName: {
-					value: 13,
-					labels: map[string]string{
-						"service_name":        "otelcol",
-						"service_version":     "latest",
-						"service_instance_id": testInstanceID,
-					},
+				metricPrefix + ocPrefix + counterName + "_total": {
+					value:  13,
+					labels: map[string]string{},
 				},
 				metricPrefix + otelPrefix + counterName + "_total": {
 					value:  13,