Integrate with open telemetry

- See prebid#4062

config/config.go

@@ -544,9 +544,15 @@ type RequestTimeoutHeaders struct {
 	RequestTimeoutInQueue string `mapstructure:"request_timeout_in_queue"`
 }
 
+type OtelMetrics struct {
+	Enabled bool   `mapstructure:"enabled"`
+	Prefix  string `mapstructure:"prefix"`
+}
+
 type Metrics struct {
 	Influxdb   InfluxMetrics     `mapstructure:"influxdb"`
 	Prometheus PrometheusMetrics `mapstructure:"prometheus"`
+	Otel       OtelMetrics       `mapstructure:"otel"`
 	Disabled   DisabledMetrics   `mapstructure:"disabled_metrics"`
 }
 

go.mod

@@ -1,10 +1,13 @@
 module github.com/prebid/prebid-server/v3
 
-go 1.21
+go 1.22
+
+toolchain go1.23.3
 
 retract v3.0.0 // Forgot to update major version in import path and module name
 
 require (
+	github.com/51Degrees/device-detection-go/v4 v4.4.35
 	github.com/DATA-DOG/go-sqlmock v1.5.0
 	github.com/IABTechLab/adscert v0.34.0
 	github.com/NYTimes/gziphandler v1.1.1
@@ -16,6 +19,7 @@ require (
 	github.com/coocood/freecache v1.2.1
 	github.com/docker/go-units v0.4.0
 	github.com/go-sql-driver/mysql v1.6.0
+	github.com/gobeam/stringy v0.0.7
 	github.com/gofrs/uuid v4.2.0+incompatible
 	github.com/golang/glog v1.1.0
 	github.com/google/go-cmp v0.6.0
@@ -32,11 +36,16 @@ require (
 	github.com/prometheus/client_model v0.2.0
 	github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475
 	github.com/rs/cors v1.11.0
+	github.com/spf13/cast v1.5.0
 	github.com/spf13/viper v1.12.0
-	github.com/stretchr/testify v1.8.1
+	github.com/stretchr/testify v1.9.0
+	github.com/tidwall/gjson v1.17.1
+	github.com/tidwall/sjson v1.2.5
 	github.com/vrischmann/go-metrics-influxdb v0.1.1
 	github.com/xeipuuv/gojsonschema v1.2.0
 	github.com/yudai/gojsondiff v1.0.0
+	go.opentelemetry.io/otel v1.32.0
+	go.opentelemetry.io/otel/metric v1.32.0
 	golang.org/x/net v0.23.0
 	golang.org/x/text v0.14.0
 	google.golang.org/grpc v1.56.3
@@ -45,11 +54,12 @@ require (
 )
 
 require (
-	github.com/51Degrees/device-detection-go/v4 v4.4.35 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/fsnotify/fsnotify v1.5.4 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/influxdata/influxdb1-client v0.0.0-20191209144304-8bf82d3c094d // indirect
@@ -65,19 +75,17 @@ require (
 	github.com/prometheus/procfs v0.7.3 // indirect
 	github.com/sergi/go-diff v1.2.0 // indirect
 	github.com/spf13/afero v1.8.2 // indirect
-	github.com/spf13/cast v1.5.0 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/stretchr/objx v0.5.0 // indirect
+	github.com/stretchr/objx v0.5.2 // indirect
 	github.com/subosito/gotenv v1.3.0 // indirect
-	github.com/tidwall/gjson v1.17.1 // indirect
 	github.com/tidwall/match v1.1.1 // indirect
 	github.com/tidwall/pretty v1.2.0 // indirect
-	github.com/tidwall/sjson v1.2.5 // indirect
 	github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f // indirect
 	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
 	github.com/yudai/golcs v0.0.0-20170316035057-ecda9a501e82 // indirect
 	github.com/yudai/pp v2.0.1+incompatible // indirect
+	go.opentelemetry.io/otel/trace v1.32.0 // indirect
 	golang.org/x/crypto v0.21.0 // indirect
 	golang.org/x/sys v0.18.0 // indirect
 	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 // indirect

go.sum

@@ -154,11 +154,18 @@ github.com/go-ldap/ldap v3.0.2+incompatible/go.mod h1:qfd9rJvER9Q0/D/Sqn1DfHRoBp
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
 github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
 github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A=
+github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
+github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/go-sql-driver/mysql v1.6.0 h1:BCTh4TKNUYmOmMUcQ3IipzF5prigylS7XXjEkfCHuOE=
 github.com/go-sql-driver/mysql v1.6.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0/go.mod h1:fyg7847qk6SyHyPtNmDHnmrv/HOrqktSC+C9fM+CJOE=
 github.com/go-test/deep v1.0.2-0.20181118220953-042da051cf31/go.mod h1:wGDj63lr65AM2AQyKZd/NYHGb0R+1RLqB8NKt3aSFNA=
+github.com/gobeam/stringy v0.0.7 h1:TD8SfhedUoiANhW88JlJqfrMsihskIRpU/VTsHGnAps=
+github.com/gobeam/stringy v0.0.7/go.mod h1:W3620X9dJHf2FSZF5fRnWekHcHQjwmCz8ZQ2d1qloqE=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/gofrs/uuid v4.2.0+incompatible h1:yyYWMnhkhrKwwr8gAOcOCYxOOscHgDS9yZgBrnJfGa0=
 github.com/gofrs/uuid v4.2.0+incompatible/go.mod h1:b2aQJv3Z4Fp6yNu3cdSllBxTCLRxnplIgP/c0N/04lM=
@@ -474,8 +481,9 @@ github.com/spf13/viper v1.12.0/go.mod h1:b6COn30jlNxbm/V2IqWiNWkJ+vZNiMNksliPCiu
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
-github.com/stretchr/objx v0.5.0 h1:1zr/of2m5FGMsad5YfcqgdqdWrIhu+EBEJRhR1U7z/c=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/objx v0.5.2 h1:xuMeJ0Sdp5ZMRXx/aWO6RZxdr3beISkG5/G/aIRr3pY=
+github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
@@ -484,8 +492,9 @@ github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
-github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/subosito/gotenv v1.2.0/go.mod h1:N0PQaV/YGNqwC0u51sEeR/aUtSLEXKX9iv69rRypqCw=
 github.com/subosito/gotenv v1.3.0 h1:mjC+YW8QpAdXibNi+vNWgzmgBH4+5l5dCXv8cNysBLI=
 github.com/subosito/gotenv v1.3.0/go.mod h1:YzJjq/33h7nrwdY+iHMhEOEEbW0ovIz0tB6t6PwAXzs=
@@ -528,6 +537,12 @@ go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.5/go.mod h1:5pWMHQbX5EPX2/62yrJeAkowc+lfs/XD7Uxpq3pI6kk=
 go.opencensus.io v0.23.0/go.mod h1:XItmlyltB5F7CS4xOC1DcqMoFqwtC6OG2xF7mCv7P7E=
+go.opentelemetry.io/otel v1.32.0 h1:WnBN+Xjcteh0zdk01SVqV55d/m62NJLJdIyb4y/WO5U=
+go.opentelemetry.io/otel v1.32.0/go.mod h1:00DCVSB0RQcnzlwyTfqtxSm+DRr9hpYrHjNGiBHVQIg=
+go.opentelemetry.io/otel/metric v1.32.0 h1:xV2umtmNcThh2/a/aCP+h64Xx5wsj8qqnkYZktzNa0M=
+go.opentelemetry.io/otel/metric v1.32.0/go.mod h1:jH7CIbbK6SH2V2wE16W05BHCtIDzauciCRLoc/SyMv8=
+go.opentelemetry.io/otel/trace v1.32.0 h1:WIC9mYrXf8TmY/EXuULKc8hR17vE+Hjv2cssQDe03fM=
+go.opentelemetry.io/otel/trace v1.32.0/go.mod h1:+i4rkvCraA+tG6AzwloGaCtkx53Fa+L+V8e9a7YvhT8=
 go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=

metrics/config/metrics.go

@@ -1,10 +1,12 @@
 package config
 
 import (
+	"log/slog"
 	"time"
 
 	"github.com/prebid/prebid-server/v3/config"
 	"github.com/prebid/prebid-server/v3/metrics"
+	"github.com/prebid/prebid-server/v3/metrics/opentelemetry"
 	prometheusmetrics "github.com/prebid/prebid-server/v3/metrics/prometheus"
 	"github.com/prebid/prebid-server/v3/openrtb_ext"
 	gometrics "github.com/rcrowley/go-metrics"
@@ -43,6 +45,13 @@ func NewMetricsEngine(cfg *config.Configuration, adapterList []openrtb_ext.Bidde
 		returnEngine.PrometheusMetrics = prometheusmetrics.NewMetrics(cfg.Metrics.Prometheus, cfg.Metrics.Disabled, syncerKeys, moduleStageNames)
 		engineList = append(engineList, returnEngine.PrometheusMetrics)
 	}
+	if cfg.Metrics.Otel.Enabled {
+		otelEngine, err := opentelemetry.NewEngine(cfg.Metrics.Otel.Prefix, &cfg.Metrics.Disabled)
+		if err != nil {
+			slog.Error("error creating otel engine", "err", err.Error())
+		}
+		engineList = append(engineList, otelEngine)
+	}
 
 	// Now return the proper metrics engine
 	if len(engineList) > 1 {