WIP: Init OpenTelemetry Support

cmd/cmd.go

@@ -17,6 +17,7 @@ import (
 
 	"code.gitea.io/gitea/models/db"
 	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/opentelemetry"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/util"
 
@@ -67,6 +68,9 @@ func initDB(ctx context.Context) error {
 Ensure you are running in the correct environment or set the correct configuration file with -c.
 If this is the intended configuration file complete the [database] section.`, setting.CustomConf)
 	}
+	if err := opentelemetry.InitOtel(ctx); err != nil {
+		return fmt.Errorf("unable to initialize OpenTelemetry. Error: %w", err)
+	}
 	if err := db.InitEngine(ctx); err != nil {
 		return fmt.Errorf("unable to initialize the database using the configuration in %q. Error: %w", setting.CustomConf, err)
 	}

go.mod

@@ -104,6 +104,7 @@ require (
 	github.com/prometheus/client_golang v1.20.5
 	github.com/quasoft/websspi v1.1.2
 	github.com/redis/go-redis/v9 v9.7.0
+	github.com/riandyrn/otelchi v0.11.0
 	github.com/robfig/cron/v3 v3.0.1
 	github.com/santhosh-tekuri/jsonschema/v5 v5.3.1
 	github.com/sassoftware/go-rpmutils v0.4.0
@@ -113,6 +114,7 @@ require (
 	github.com/syndtr/goleveldb v1.0.0
 	github.com/tstranex/u2f v1.0.0
 	github.com/ulikunitz/xz v0.5.12
+	github.com/uptrace/opentelemetry-go-extra/otelsql v0.3.2
 	github.com/urfave/cli/v2 v2.27.5
 	github.com/wneessen/go-mail v0.5.2
 	github.com/xanzy/go-gitlab v0.112.0
@@ -121,6 +123,8 @@ require (
 	github.com/yuin/goldmark v1.7.8
 	github.com/yuin/goldmark-highlighting/v2 v2.0.0-20230729083705-37449abec8cc
 	github.com/yuin/goldmark-meta v1.1.0
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.32.0
+	go.opentelemetry.io/otel/sdk v1.32.0
 	golang.org/x/crypto v0.31.0
 	golang.org/x/image v0.21.0
 	golang.org/x/net v0.33.0
@@ -139,6 +143,16 @@ require (
 	xorm.io/xorm v1.3.9
 )
 
+require (
+	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.23.0 // indirect
+	go.opentelemetry.io/otel/metric v1.32.0 // indirect
+	go.opentelemetry.io/proto/otlp v1.3.1 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20241104194629-dd2ea8efbc28 // indirect
+)
+
 require (
 	cloud.google.com/go/compute/metadata v0.5.2 // indirect
 	dario.cat/mergo v1.0.1 // indirect
@@ -310,15 +324,18 @@ require (
 	github.com/zeebo/blake3 v0.2.4 // indirect
 	go.etcd.io/bbolt v1.3.11 // indirect
 	go.mongodb.org/mongo-driver v1.17.1 // indirect
-	go.opentelemetry.io/otel v1.31.0 // indirect
-	go.opentelemetry.io/otel/trace v1.31.0 // indirect
+	go.opentelemetry.io/otel v1.32.0
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.32.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.32.0
+	go.opentelemetry.io/otel/sdk/metric v1.32.0
+	go.opentelemetry.io/otel/trace v1.32.0 // indirect
 	go.uber.org/atomic v1.11.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	go.uber.org/zap v1.27.0 // indirect
 	golang.org/x/exp v0.0.0-20241009180824-f66d83c29e7c // indirect
 	golang.org/x/mod v0.21.0 // indirect
 	golang.org/x/time v0.7.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20241021214115-324edc3d5d38 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20241104194629-dd2ea8efbc28 // indirect
 	gopkg.in/warnings.v0 v0.1.2 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 )

go.sum

@@ -199,6 +199,8 @@ github.com/caddyserver/certmagic v0.21.4 h1:e7VobB8rffHv8ZZpSiZtEwnLDHUwLVYLWzWS
 github.com/caddyserver/certmagic v0.21.4/go.mod h1:swUXjQ1T9ZtMv95qj7/InJvWLXURU85r+CfG0T+ZbDE=
 github.com/caddyserver/zerossl v0.1.3 h1:onS+pxp3M8HnHpN5MMbOMyNjmTheJyWRaZYwn+YTAyA=
 github.com/caddyserver/zerossl v0.1.3/go.mod h1:CxA0acn7oEGO6//4rtrRjYgEoa4MFw/XofZnrYwGqG4=
+github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8=
+github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
 github.com/cention-sany/utf7 v0.0.0-20170124080048-26cad61bd60a h1:MISbI8sU/PSK/ztvmWKFcI7UGb5/HQT7B+i3a2myKgI=
 github.com/cention-sany/utf7 v0.0.0-20170124080048-26cad61bd60a/go.mod h1:2GxOXOlEPAMFPfp014mK1SWq8G8BN8o7/dfYqJrVGn8=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
@@ -335,6 +337,11 @@ github.com/go-ini/ini v1.67.0 h1:z6ZrTEZqSWOTyH2FlglNbNgARyHG8oLW9gMELqKr06A=
 github.com/go-ini/ini v1.67.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
 github.com/go-ldap/ldap/v3 v3.4.8 h1:loKJyspcRezt2Q3ZRMq2p/0v8iOurlmeXDPw6fikSvQ=
 github.com/go-ldap/ldap/v3 v3.4.8/go.mod h1:qS3Sjlu76eHfHGpUdWkAXQTw4beih+cHsco2jXlIXrk=
+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-openapi/analysis v0.23.0 h1:aGday7OWupfMs+LbmLZG4k0MYXIANxcuBTYUC03zFCU=
 github.com/go-openapi/analysis v0.23.0/go.mod h1:9mz9ZWaSlV8TvjQHLl2mUW2PbZtemkE8yA5v22ohupo=
 github.com/go-openapi/errors v0.22.0 h1:c4xY/OLxUBSTiepAg3j/MHuAv5mJhnf53LLMWFB+u/w=
@@ -468,6 +475,8 @@ github.com/gorilla/sessions v1.2.0/go.mod h1:dk2InVEVJ0sfLlnXv9EAgkf6ecYs/i80K/z
 github.com/gorilla/sessions v1.2.1/go.mod h1:dk2InVEVJ0sfLlnXv9EAgkf6ecYs/i80K/zI+bUmuGM=
 github.com/gorilla/sessions v1.4.0 h1:kpIYOp/oi6MG/p5PgxApU8srsSw9tuFbt46Lt7auzqQ=
 github.com/gorilla/sessions v1.4.0/go.mod h1:FLWm50oby91+hl7p/wRxDth9bWSuk0qVL2emc7lT5ik=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.23.0 h1:ad0vkEBuk23VJzZR9nkLVG0YAoN9coASF1GusYX6AlU=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.23.0/go.mod h1:igFoXX2ELCW06bol23DWPB5BEWfZISOzSP5K2sbLea0=
 github.com/h2non/gock v1.2.0 h1:K6ol8rfrRkUOefooBC8elXoaNGYkpp7y2qcxGG6BzUE=
 github.com/h2non/gock v1.2.0/go.mod h1:tNhoxHYW2W42cYkYb1WqzdbYIieALC99kpYr7rH/BQk=
 github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542 h1:2VTzZjLZBgl62/EtslCrtky5vbi9dd7HrQPQIx6wqiw=
@@ -711,6 +720,8 @@ github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0 h1:OdAsTTz6O
 github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/rhysd/actionlint v1.7.3 h1:WD919WuLYrSCwY8VGBqJBEuzyVEIL5viXmXqRRcKOVs=
 github.com/rhysd/actionlint v1.7.3/go.mod h1:rl+8ZoX1rqnbcMWKaTyOHmw08mmb/zlmG/Zu1fY47F4=
+github.com/riandyrn/otelchi v0.11.0 h1:x9MFoTgHcwCC2DdWkTEEZ2ZQFkbl6z7GXLQtTANN6Gk=
+github.com/riandyrn/otelchi v0.11.0/go.mod h1:FlBYmG9fBQu0jFRvZZrATP4mDvLX2H5gwELfpZvNlxY=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
 github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
@@ -810,6 +821,8 @@ github.com/ulikunitz/xz v0.5.12 h1:37Nm15o69RwBkXM0J6A5OlE67RZTfzUxTj8fB3dfcsc=
 github.com/ulikunitz/xz v0.5.12/go.mod h1:nbz6k7qbPmH4IRqmfOplQw/tblSgqTqBwxkY0oWt/14=
 github.com/unknwon/com v1.0.1 h1:3d1LTxD+Lnf3soQiD4Cp/0BRB+Rsa/+RTvz8GMMzIXs=
 github.com/unknwon/com v1.0.1/go.mod h1:tOOxU81rwgoCLoOVVPHb6T/wt8HZygqH5id+GNnlCXM=
+github.com/uptrace/opentelemetry-go-extra/otelsql v0.3.2 h1:ZjUj9BLYf9PEqBn8W/OapxhPjVRdC6CsXTdULHsyk5c=
+github.com/uptrace/opentelemetry-go-extra/otelsql v0.3.2/go.mod h1:O8bHQfyinKwTXKkiKNGmLQS7vRsqRxIQTFZpYpHK3IQ=
 github.com/urfave/cli/v2 v2.27.5 h1:WoHEJLdsXr6dDWoJgMq/CboDmyY/8HMMH1fTECbih+w=
 github.com/urfave/cli/v2 v2.27.5/go.mod h1:3Sevf16NykTbInEnD0yKkjDAeZDS0A6bzhBH5hrMvTQ=
 github.com/valyala/fastjson v1.6.4 h1:uAUNq9Z6ymTgGhcm0UynUAB6tlbakBrz6CQFax3BXVQ=
@@ -866,10 +879,24 @@ go.etcd.io/bbolt v1.3.11/go.mod h1:dksAq7YMXoljX0xu6VF5DMZGbhYYoLUalEiSySYAS4I=
 go.mongodb.org/mongo-driver v1.11.4/go.mod h1:PTSz5yu21bkT/wXpkS7WR5f0ddqw5quethTUn9WM+2g=
 go.mongodb.org/mongo-driver v1.17.1 h1:Wic5cJIwJgSpBhe3lx3+/RybR5PiYRMpVFgO7cOHyIM=
 go.mongodb.org/mongo-driver v1.17.1/go.mod h1:wwWm/+BuOddhcq3n68LKRmgk2wXzmF6s0SFOa0GINL4=
-go.opentelemetry.io/otel v1.31.0 h1:NsJcKPIW0D0H3NgzPDHmo0WW6SptzPdqg/L1zsIm2hY=
-go.opentelemetry.io/otel v1.31.0/go.mod h1:O0C14Yl9FgkjqcCZAsE053C13OaddMYr/hz6clDkEJE=
-go.opentelemetry.io/otel/trace v1.31.0 h1:ffjsj1aRouKewfr85U2aGagJ46+MvodynlQ1HYdmJys=
-go.opentelemetry.io/otel/trace v1.31.0/go.mod h1:TXZkRk7SM2ZQLtR6eoAWQFIHPvzQ06FJAsO1tJg480A=
+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/exporters/otlp/otlpmetric/otlpmetrichttp v1.32.0 h1:t/Qur3vKSkUCcDVaSumWF2PKHt85pc7fRvFuoVT8qFU=
+go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.32.0/go.mod h1:Rl61tySSdcOJWoEgYZVtmnKdA0GeKrSqkHC1t+91CH8=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.32.0 h1:IJFEoHiytixx8cMiVAO+GmHR6Frwu+u5Ur8njpFO6Ac=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.32.0/go.mod h1:3rHrKNtLIoS0oZwkY2vxi+oJcwFRWdtUyRII+so45p8=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.32.0 h1:cMyu9O88joYEaI47CnQkxO1XZdpoTF9fEnW2duIddhw=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.32.0/go.mod h1:6Am3rn7P9TVVeXYG+wtcGE7IE1tsQ+bP3AuWcKt/gOI=
+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/sdk v1.32.0 h1:RNxepc9vK59A8XsgZQouW8ue8Gkb4jpWtJm9ge5lEG4=
+go.opentelemetry.io/otel/sdk v1.32.0/go.mod h1:LqgegDBjKMmb2GC6/PrTnteJG39I8/vJCAP9LlJXEjU=
+go.opentelemetry.io/otel/sdk/metric v1.32.0 h1:rZvFnvmvawYb0alrYkjraqJq0Z4ZUJAiyYCU9snn1CU=
+go.opentelemetry.io/otel/sdk/metric v1.32.0/go.mod h1:PWeZlq0zt9YkYAp3gjKZ0eicRYvOh1Gd+X99x6GHpCQ=
+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 v1.3.1 h1:TrMUixzpM0yuc/znrFTP9MMRh8trP93mkCiDVeXrui0=
+go.opentelemetry.io/proto/otlp v1.3.1/go.mod h1:0X1WI4de4ZsLrrJNLAQbFeLCm3T7yBkR0XqQ7niQU+8=
 go.uber.org/atomic v1.9.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/atomic v1.11.0 h1:ZvwS0R+56ePWxUNi+Atn9dWONBPp/AUETXlHW0DxSjE=
 go.uber.org/atomic v1.11.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0=
@@ -1036,8 +1063,10 @@ golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8T
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20241021214115-324edc3d5d38 h1:zciRKQ4kBpFgpfC5QQCVtnnNAcLIqweL7plyZRQHVpI=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20241021214115-324edc3d5d38/go.mod h1:GX3210XPVPUjJbTUbvwI8f2IpZDMZuPJWDzDuebbviI=
+google.golang.org/genproto/googleapis/api v0.0.0-20241104194629-dd2ea8efbc28 h1:M0KvPgPmDZHPlbRbaNU1APr28TvwvvdUPlSv7PUvy8g=
+google.golang.org/genproto/googleapis/api v0.0.0-20241104194629-dd2ea8efbc28/go.mod h1:dguCy7UOdZhTvLzDyt15+rOrawrpM4q7DD9dQ1P11P4=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20241104194629-dd2ea8efbc28 h1:XVhgTWWV3kGQlwJHR3upFWZeTsei6Oks1apkZSeonIE=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20241104194629-dd2ea8efbc28/go.mod h1:GX3210XPVPUjJbTUbvwI8f2IpZDMZuPJWDzDuebbviI=
 google.golang.org/grpc v1.67.1 h1:zWnc1Vrcno+lHZCOofnIMvycFcc0QRGIzm9dhnDX68E=
 google.golang.org/grpc v1.67.1/go.mod h1:1gLDyUQU7CTLJI90u3nXZ9ekeghjeM7pTDZlqFNg2AA=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=

models/db/engine_init.go

@@ -11,7 +11,11 @@ import (
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
 
+	"github.com/uptrace/opentelemetry-go-extra/otelsql"
+	"go.opentelemetry.io/otel/attribute"
+	semconv "go.opentelemetry.io/otel/semconv/v1.27.0"
 	"xorm.io/xorm"
+	"xorm.io/xorm/core"
 	"xorm.io/xorm/names"
 )
 
@@ -30,15 +34,36 @@ func newXORMEngine() (*xorm.Engine, error) {
 	}
 
 	var engine *xorm.Engine
+	engineName := setting.Database.Type.String()
 
 	if setting.Database.Type.IsPostgreSQL() && len(setting.Database.Schema) > 0 {
 		// OK whilst we sort out our schema issues - create a schema aware postgres
 		registerPostgresSchemaDriver()
-		engine, err = xorm.NewEngine("postgresschema", connStr)
-	} else {
-		engine, err = xorm.NewEngine(setting.Database.Type.String(), connStr)
+		engineName = "postgresschema"
 	}
 
+	var semconvDBSystem attribute.KeyValue
+	switch setting.Database.Type {
+	case "sqlite3":
+		semconvDBSystem = semconv.DBSystemSqlite
+	case "mysql":
+		semconvDBSystem = semconv.DBSystemMySQL
+	case "postgres":
+		semconvDBSystem = semconv.DBSystemPostgreSQL
+	case "mssql":
+		semconvDBSystem = semconv.DBSystemMSSQL
+	default:
+		return nil, fmt.Errorf("unsupported database type: %s", setting.Database.Type)
+	}
+
+	db, err := otelsql.Open(engineName, connStr,
+		otelsql.WithAttributes(semconvDBSystem),
+		otelsql.WithDBName(setting.Database.Name))
+	if err != nil {
+		return engine, err
+	}
+	xormCore := core.FromDB(db)
+	engine, err = xorm.NewEngineWithDB(engineName, connStr, xormCore)
 	if err != nil {
 		return nil, err
 	}

modules/opentelemetry/context.go

@@ -0,0 +1,41 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package opentelemetry
+
+import (
+	"context"
+
+	"go.opentelemetry.io/otel/sdk/metric"
+	"go.opentelemetry.io/otel/sdk/trace"
+)
+
+type Context struct {
+	context.Context
+	tp *trace.TracerProvider
+	mp *metric.MeterProvider
+}
+
+var DefaultContext *Context
+
+func GetTracerProvider(ctx context.Context) *trace.TracerProvider {
+	if telemetryCtx, ok := ctx.(*Context); ok {
+		return telemetryCtx.tp
+	}
+	return DefaultContext.tp
+}
+
+func GetMeterProvider(ctx context.Context) *metric.MeterProvider {
+	if telemetryCtx, ok := ctx.(*Context); ok {
+		return telemetryCtx.mp
+	}
+	return DefaultContext.mp
+}
+
+func SetDefaultProviders(ctx context.Context, tp *trace.TracerProvider, mp *metric.MeterProvider) {
+	DefaultContext = &Context{
+		Context: ctx,
+		tp:      tp,
+		mp:      mp,
+	}
+}

modules/opentelemetry/telemetry.go

@@ -0,0 +1,32 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package opentelemetry
+
+import (
+	"context"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
+	"go.opentelemetry.io/otel/sdk/metric"
+	"go.opentelemetry.io/otel/sdk/trace"
+)
+
+func InitOtel(ctx context.Context) error {
+	traceExporter, _ := otlptracehttp.New(ctx)
+	metricExporter, _ := otlpmetrichttp.New(ctx)
+
+	tp := trace.NewTracerProvider(
+		trace.WithBatcher(traceExporter),
+	)
+	otel.SetTracerProvider(tp)
+
+	mp := metric.NewMeterProvider(
+		metric.WithReader(metric.NewPeriodicReader(metricExporter)),
+	)
+	otel.SetMeterProvider(mp)
+
+	SetDefaultProviders(ctx, tp, mp)
+	return nil
+}

modules/web/route.go

@@ -52,6 +52,10 @@ func NewRouter() *Router {
 	return &Router{chiRouter: r}
 }
 
+func (r *Router) GetRouter() chi.Router {
+	return r.chiRouter
+}
+
 // Use supports two middlewares
 func (r *Router) Use(middlewares ...any) {
 	for _, m := range middlewares {

routers/init.go

@@ -18,6 +18,7 @@ import (
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/markup"
 	"code.gitea.io/gitea/modules/markup/external"
+	"code.gitea.io/gitea/modules/opentelemetry"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/ssh"
 	"code.gitea.io/gitea/modules/storage"
@@ -55,6 +56,9 @@ import (
 	"code.gitea.io/gitea/services/task"
 	"code.gitea.io/gitea/services/uinotification"
 	"code.gitea.io/gitea/services/webhook"
+
+	"github.com/riandyrn/otelchi"
+	otelchimetric "github.com/riandyrn/otelchi/metric"
 )
 
 func mustInit(fn func() error) {
@@ -113,6 +117,7 @@ func InitWebInstallPage(ctx context.Context) {
 
 // InitWebInstalled is for global installed configuration.
 func InitWebInstalled(ctx context.Context) {
+	mustInitCtx(ctx, opentelemetry.InitOtel)
 	mustInitCtx(ctx, git.InitFull)
 	log.Info("Git version: %s (home: %s)", git.DefaultFeatures().VersionInfo(), git.HomeDir())
 	if !git.DefaultFeatures().SupportHashSha256 {
@@ -183,6 +188,17 @@ func InitWebInstalled(ctx context.Context) {
 func NormalRoutes() *web.Router {
 	_ = templates.HTMLRenderer()
 	r := web.NewRouter()
+
+	mp := opentelemetry.GetMeterProvider(context.Background())
+
+	baseCfg := otelchimetric.NewBaseConfig("gitea", otelchimetric.WithMeterProvider(mp))
+	r.Use(
+		otelchi.Middleware("gitea", otelchi.WithChiRoutes(r.GetRouter())),
+		otelchimetric.NewRequestDurationMillis(baseCfg),
+		otelchimetric.NewRequestInFlight(baseCfg),
+		otelchimetric.NewResponseSizeBytes(baseCfg),
+	)
+
 	r.Use(common.ProtocolMiddlewares()...)
 
 	r.Mount("/", web_routers.Routes())