[chore] Move metrics initialization in service/telemetry

Signed-off-by: Bogdan Drutu <[email protected]>

service/internal/promtest/server_util.go

@@ -0,0 +1,34 @@
+package promtest
+
+import (
+	"net"
+	"strconv"
+	"testing"
+
+	"go.opentelemetry.io/contrib/config"
+
+	"go.opentelemetry.io/collector/internal/testutil"
+)
+
+func GetAvailableLocalIPv6AddressPrometheus(t testing.TB) *config.Prometheus {
+	return addrToPrometheus(testutil.GetAvailableLocalIPv6Address(t))
+}
+
+func GetAvailableLocalAddressPrometheus(t testing.TB) *config.Prometheus {
+	return addrToPrometheus(testutil.GetAvailableLocalAddress(t))
+}
+
+func addrToPrometheus(address string) *config.Prometheus {
+	host, port, err := net.SplitHostPort(address)
+	if err != nil {
+		return nil
+	}
+	portInt, err := strconv.Atoi(port)
+	if err != nil {
+		return nil
+	}
+	return &config.Prometheus{
+		Host: &host,
+		Port: &portInt,
+	}
+}

service/service.go

@@ -45,14 +45,6 @@ var useOtelWithSDKConfigurationForInternalTelemetryFeatureGate = featuregate.Glo
 	featuregate.WithRegisterDescription("controls whether the collector supports extended OpenTelemetry"+
 		"configuration for internal telemetry"))
 
-// disableHighCardinalityMetricsfeatureGate is the feature gate that controls whether the collector should enable
-// potentially high cardinality metrics. The gate will be removed when the collector allows for view configuration.
-var disableHighCardinalityMetricsfeatureGate = featuregate.GlobalRegistry().MustRegister(
-	"telemetry.disableHighCardinalityMetrics",
-	featuregate.StageAlpha,
-	featuregate.WithRegisterDescription("controls whether the collector should enable potentially high"+
-		"cardinality metrics. The gate will be removed when the collector allows for view configuration."))
-
 // Settings holds configuration for building a new Service.
 type Settings struct {
 	// BuildInfo provides collector start information.
@@ -104,8 +96,6 @@ type Service struct {
 
 // New creates a new Service, its telemetry, and Components.
 func New(ctx context.Context, set Settings, cfg Config) (*Service, error) {
-	disableHighCard := disableHighCardinalityMetricsfeatureGate.IsEnabled()
-
 	srv := &Service{
 		buildInfo: set.BuildInfo,
 		host: &graph.Host{
@@ -144,14 +134,7 @@ func New(ctx context.Context, set Settings, cfg Config) (*Service, error) {
 
 	logger.Info("Setting up own telemetry...")
 
-	mp, err := newMeterProvider(
-		meterProviderSettings{
-			res:               res,
-			cfg:               cfg.Telemetry.Metrics,
-			asyncErrorChannel: set.AsyncErrorChannel,
-		},
-		disableHighCard,
-	)
+	mp, err := telFactory.CreateMeterProvider(ctx, telset, &cfg.Telemetry)
 	if err != nil {
 		return nil, fmt.Errorf("failed to create metric provider: %w", err)
 	}
@@ -198,11 +181,7 @@ func New(ctx context.Context, set Settings, cfg Config) (*Service, error) {
 
 func logsAboutMeterProvider(logger *zap.Logger, cfg telemetry.MetricsConfig, mp metric.MeterProvider) {
 	if cfg.Level == configtelemetry.LevelNone || (cfg.Address == "" && len(cfg.Readers) == 0) {
-		logger.Info(
-			"Skipped telemetry setup.",
-			zap.String(zapKeyTelemetryAddress, cfg.Address),
-			zap.Stringer(zapKeyTelemetryLevel, cfg.Level),
-		)
+		logger.Info("Skipped telemetry setup.")
 		return
 	}
 

service/service_test.go

@@ -8,9 +8,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"net"
 	"net/http"
-	"strconv"
 	"strings"
 	"sync"
 	"testing"
@@ -35,6 +33,7 @@ import (
 	"go.opentelemetry.io/collector/pdata/pcommon"
 	"go.opentelemetry.io/collector/service/extensions"
 	"go.opentelemetry.io/collector/service/internal/builders"
+	"go.opentelemetry.io/collector/service/internal/promtest"
 	"go.opentelemetry.io/collector/service/pipelines"
 	"go.opentelemetry.io/collector/service/telemetry"
 )
@@ -355,10 +354,10 @@ func testCollectorStartHelperWithReaders(t *testing.T, tc ownMetricsTestCase, ne
 	)
 	switch network {
 	case "tcp", "tcp4":
-		metricsAddr = getAvailableLocalAddressPrometheus(t)
+		metricsAddr = promtest.GetAvailableLocalAddressPrometheus(t)
 		zpagesAddr = testutil.GetAvailableLocalAddress(t)
 	case "tcp6":
-		metricsAddr = getAvailableLocalIPv6AddressPrometheus(t)
+		metricsAddr = promtest.GetAvailableLocalIPv6AddressPrometheus(t)
 		zpagesAddr = testutil.GetAvailableLocalIPv6Address(t)
 	}
 	require.NotZero(t, metricsAddr, "network must be either of tcp, tcp4 or tcp6")
@@ -745,26 +744,3 @@ func newConfigWatcherExtensionFactory(name component.Type) extension.Factory {
 		component.StabilityLevelDevelopment,
 	)
 }
-
-func getAvailableLocalIPv6AddressPrometheus(t testing.TB) *config.Prometheus {
-	return addrToPrometheus(testutil.GetAvailableLocalIPv6Address(t))
-}
-
-func getAvailableLocalAddressPrometheus(t testing.TB) *config.Prometheus {
-	return addrToPrometheus(testutil.GetAvailableLocalAddress(t))
-}
-
-func addrToPrometheus(address string) *config.Prometheus {
-	host, port, err := net.SplitHostPort(address)
-	if err != nil {
-		return nil
-	}
-	portInt, err := strconv.Atoi(port)
-	if err != nil {
-		return nil
-	}
-	return &config.Prometheus{
-		Host: &host,
-		Port: &portInt,
-	}
-}

service/telemetry/factory.go

@@ -7,15 +7,26 @@ import (
 	"context"
 	"time"
 
+	"go.opentelemetry.io/otel/metric"
 	"go.opentelemetry.io/otel/trace"
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
 
 	"go.opentelemetry.io/collector/component"
 	"go.opentelemetry.io/collector/config/configtelemetry"
+	"go.opentelemetry.io/collector/featuregate"
+	"go.opentelemetry.io/collector/service/internal/resource"
 	"go.opentelemetry.io/collector/service/telemetry/internal"
 )
 
+// disableHighCardinalityMetricsfeatureGate is the feature gate that controls whether the collector should enable
+// potentially high cardinality metrics. The gate will be removed when the collector allows for view configuration.
+var disableHighCardinalityMetricsfeatureGate = featuregate.GlobalRegistry().MustRegister(
+	"telemetry.disableHighCardinalityMetrics",
+	featuregate.StageAlpha,
+	featuregate.WithRegisterDescription("controls whether the collector should enable potentially high"+
+		"cardinality metrics. The gate will be removed when the collector allows for view configuration."))
+
 func createDefaultConfig() component.Config {
 	return &Config{
 		Logs: LogsConfig{
@@ -55,5 +66,17 @@ func NewFactory() Factory {
 			c := *cfg.(*Config)
 			return newTracerProvider(ctx, set, c)
 		}),
+		internal.WithMeterProvider(func(ctx context.Context, set Settings, cfg component.Config) (metric.MeterProvider, error) {
+			c := *cfg.(*Config)
+			disableHighCard := disableHighCardinalityMetricsfeatureGate.IsEnabled()
+			return newMeterProvider(
+				meterProviderSettings{
+					res:               resource.New(set.BuildInfo, c.Resource),
+					cfg:               c.Metrics,
+					asyncErrorChannel: set.AsyncErrorChannel,
+				},
+				disableHighCard,
+			)
+		}),
 	)
 }

service/telemetry.go → service/telemetry/metrics.go

@@ -1,7 +1,7 @@
 // Copyright The OpenTelemetry Authors
 // SPDX-License-Identifier: Apache-2.0
 
-package service // import "go.opentelemetry.io/collector/service"
+package telemetry // import "go.opentelemetry.io/collector/service"
 
 import (
 	"context"
@@ -20,7 +20,6 @@ import (
 
 	"go.opentelemetry.io/collector/config/configtelemetry"
 	"go.opentelemetry.io/collector/service/internal/proctelemetry"
-	"go.opentelemetry.io/collector/service/telemetry"
 )
 
 const (
@@ -36,7 +35,7 @@ type meterProvider struct {
 
 type meterProviderSettings struct {
 	res               *resource.Resource
-	cfg               telemetry.MetricsConfig
+	cfg               MetricsConfig
 	asyncErrorChannel chan error
 }
 
@@ -93,7 +92,7 @@ func newMeterProvider(set meterProviderSettings, disableHighCardinality bool) (m
 }
 
 // LogAboutServers logs about the servers that are serving metrics.
-func (mp *meterProvider) LogAboutServers(logger *zap.Logger, cfg telemetry.MetricsConfig) {
+func (mp *meterProvider) LogAboutServers(logger *zap.Logger, cfg MetricsConfig) {
 	for _, server := range mp.servers {
 		logger.Info(
 			"Serving metrics",

service/telemetry_test.go → service/telemetry/metrics_test.go

@@ -1,7 +1,7 @@
 // Copyright The OpenTelemetry Authors
 // SPDX-License-Identifier: Apache-2.0
 
-package service
+package telemetry
 
 import (
 	"context"
@@ -20,8 +20,8 @@ import (
 	"go.opentelemetry.io/collector/internal/testutil"
 	semconv "go.opentelemetry.io/collector/semconv/v1.18.0"
 	"go.opentelemetry.io/collector/service/internal/proctelemetry"
+	"go.opentelemetry.io/collector/service/internal/promtest"
 	"go.opentelemetry.io/collector/service/internal/resource"
-	"go.opentelemetry.io/collector/service/telemetry"
 )
 
 const (
@@ -32,6 +32,8 @@ const (
 	counterName  = "test_counter"
 )
 
+var testInstanceID = "test_instance_id"
+
 func TestTelemetryInit(t *testing.T) {
 	type metricValue struct {
 		value  float64
@@ -43,7 +45,7 @@ func TestTelemetryInit(t *testing.T) {
 		disableHighCard bool
 		expectedMetrics map[string]metricValue
 		extendedConfig  bool
-		cfg             *telemetry.Config
+		cfg             *Config
 	}{
 		{
 			name: "UseOpenTelemetryForInternalMetrics",
@@ -128,11 +130,11 @@ func TestTelemetryInit(t *testing.T) {
 		{
 			name:           "UseOTelWithSDKConfiguration",
 			extendedConfig: true,
-			cfg: &telemetry.Config{
-				Metrics: telemetry.MetricsConfig{
+			cfg: &Config{
+				Metrics: MetricsConfig{
 					Level: configtelemetry.LevelDetailed,
 				},
-				Traces: telemetry.TracesConfig{
+				Traces: TracesConfig{
 					Processors: []config.SpanProcessor{
 						{
 							Batch: &config.BatchSpanProcessor{
@@ -194,18 +196,18 @@ func TestTelemetryInit(t *testing.T) {
 					{
 						Pull: &config.PullMetricReader{
 							Exporter: config.MetricExporter{
-								Prometheus: getAvailableLocalAddressPrometheus(t),
+								Prometheus: promtest.GetAvailableLocalAddressPrometheus(t),
 							},
 						},
 					},
 				}
 			}
 			if tc.cfg == nil {
-				tc.cfg = &telemetry.Config{
+				tc.cfg = &Config{
 					Resource: map[string]*string{
 						semconv.AttributeServiceInstanceID: &testInstanceID,
 					},
-					Metrics: telemetry.MetricsConfig{
+					Metrics: MetricsConfig{
 						Level:   configtelemetry.LevelDetailed,
 						Address: testutil.GetAvailableLocalAddress(t),
 					},