From 246bd9bc5cb2a462434a5b4b9615269f62401efb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Oliver=20G=C3=BCnther?= <mail@oliverguenther.de>
Date: Wed, 17 Sep 2025 14:33:46 +0200
Subject: [PATCH] Add optional dependency to opentelemtry for metrics exports

---
 Gemfile                                 |   5 +
 Gemfile.lock                            | 321 ++++++++++++++++++++++++
 config/constants/settings/definition.rb |   6 +
 config/initializers/opentelemetry.rb    |  39 +++
 4 files changed, 371 insertions(+)
 create mode 100644 config/initializers/opentelemetry.rb

diff --git a/Gemfile b/Gemfile
index b94e8361d04..8921581eec1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -225,6 +225,11 @@ gem "yabeda-prometheus-mmap", require: false
 gem "yabeda-puma-plugin"
 gem "yabeda-rails"
 
+# opentelemetry
+gem "opentelemetry-exporter-otlp", "~> 0.30.0", require: false
+gem "opentelemetry-instrumentation-all", "~> 0.81.0", require: false
+gem "opentelemetry-sdk", "~> 1.9", require: false
+
 gem "view_component", "~> 4.0.2"
 # Lookbook
 gem "lookbook", "2.3.13"
diff --git a/Gemfile.lock b/Gemfile.lock
index 0e877aa3352..1b9a68bf39e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -634,6 +634,35 @@ GEM
       base64 (~> 0.2)
       faraday (>= 1.0, < 3.a)
     google-logging-utils (0.2.0)
+    google-protobuf (4.32.1)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.32.1-aarch64-linux-gnu)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.32.1-aarch64-linux-musl)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.32.1-arm64-darwin)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.32.1-x86-linux-gnu)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.32.1-x86-linux-musl)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.32.1-x86_64-darwin)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.32.1-x86_64-linux-gnu)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.32.1-x86_64-linux-musl)
+      bigdecimal
+      rake (>= 13)
+    googleapis-common-protos-types (1.21.0)
+      google-protobuf (~> 4.26)
     googleauth (1.15.0)
       faraday (>= 1.0, < 3.a)
       google-cloud-env (~> 2.2)
@@ -861,6 +890,230 @@ GEM
     openssl (3.3.0)
     openssl-signature_algorithm (1.3.0)
       openssl (> 2.0)
+    opentelemetry-api (1.6.0)
+    opentelemetry-common (0.22.0)
+      opentelemetry-api (~> 1.0)
+    opentelemetry-exporter-otlp (0.30.0)
+      google-protobuf (>= 3.18)
+      googleapis-common-protos-types (~> 1.3)
+      opentelemetry-api (~> 1.1)
+      opentelemetry-common (~> 0.20)
+      opentelemetry-sdk (~> 1.2)
+      opentelemetry-semantic_conventions
+    opentelemetry-helpers-mysql (0.2.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-common (~> 0.21)
+    opentelemetry-helpers-sql (0.1.1)
+      opentelemetry-api (~> 1.0)
+    opentelemetry-helpers-sql-obfuscation (0.3.0)
+      opentelemetry-common (~> 0.21)
+    opentelemetry-instrumentation-action_mailer (0.4.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-active_support (~> 0.7)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-action_pack (0.13.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+      opentelemetry-instrumentation-rack (~> 0.21)
+    opentelemetry-instrumentation-action_view (0.9.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-active_support (~> 0.7)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-active_job (0.8.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-active_model_serializers (0.22.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-active_support (>= 0.7.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-active_record (0.9.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-active_storage (0.1.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-active_support (~> 0.7)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-active_support (0.8.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-all (0.81.0)
+      opentelemetry-instrumentation-active_model_serializers (~> 0.22.0)
+      opentelemetry-instrumentation-anthropic (~> 0.1.0)
+      opentelemetry-instrumentation-aws_lambda (~> 0.3.0)
+      opentelemetry-instrumentation-aws_sdk (~> 0.8.0)
+      opentelemetry-instrumentation-bunny (~> 0.22.0)
+      opentelemetry-instrumentation-concurrent_ruby (~> 0.22.0)
+      opentelemetry-instrumentation-dalli (~> 0.27.0)
+      opentelemetry-instrumentation-delayed_job (~> 0.23.0)
+      opentelemetry-instrumentation-ethon (~> 0.23.0)
+      opentelemetry-instrumentation-excon (~> 0.24.0)
+      opentelemetry-instrumentation-faraday (~> 0.28.0)
+      opentelemetry-instrumentation-grape (~> 0.3.0)
+      opentelemetry-instrumentation-graphql (~> 0.29.0)
+      opentelemetry-instrumentation-grpc (~> 0.2.0)
+      opentelemetry-instrumentation-gruf (~> 0.3.0)
+      opentelemetry-instrumentation-http (~> 0.25.0)
+      opentelemetry-instrumentation-http_client (~> 0.24.0)
+      opentelemetry-instrumentation-httpx (~> 0.3.0)
+      opentelemetry-instrumentation-koala (~> 0.21.0)
+      opentelemetry-instrumentation-lmdb (~> 0.23.0)
+      opentelemetry-instrumentation-mongo (~> 0.23.0)
+      opentelemetry-instrumentation-mysql2 (~> 0.29.0)
+      opentelemetry-instrumentation-net_http (~> 0.24.0)
+      opentelemetry-instrumentation-pg (~> 0.30.0)
+      opentelemetry-instrumentation-que (~> 0.9.0)
+      opentelemetry-instrumentation-racecar (~> 0.4.0)
+      opentelemetry-instrumentation-rack (~> 0.27.0)
+      opentelemetry-instrumentation-rails (~> 0.37.0)
+      opentelemetry-instrumentation-rake (~> 0.3.1)
+      opentelemetry-instrumentation-rdkafka (~> 0.7.0)
+      opentelemetry-instrumentation-redis (~> 0.26.1)
+      opentelemetry-instrumentation-resque (~> 0.6.0)
+      opentelemetry-instrumentation-restclient (~> 0.24.0)
+      opentelemetry-instrumentation-ruby_kafka (~> 0.22.0)
+      opentelemetry-instrumentation-sidekiq (~> 0.26.0)
+      opentelemetry-instrumentation-sinatra (~> 0.26.0)
+      opentelemetry-instrumentation-trilogy (~> 0.61.0)
+    opentelemetry-instrumentation-anthropic (0.1.0)
+      opentelemetry-api (~> 1.6.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-aws_lambda (0.3.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-aws_sdk (0.8.2)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-base (0.23.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-common (~> 0.21)
+      opentelemetry-registry (~> 0.1)
+    opentelemetry-instrumentation-bunny (0.22.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-concurrent_ruby (0.22.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-dalli (0.27.3)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-delayed_job (0.23.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-ethon (0.23.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-excon (0.24.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-faraday (0.28.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-grape (0.3.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+      opentelemetry-instrumentation-rack (~> 0.21)
+    opentelemetry-instrumentation-graphql (0.29.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-grpc (0.2.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-gruf (0.3.0)
+      opentelemetry-api (>= 1.0.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-http (0.25.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-http_client (0.24.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-httpx (0.3.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-koala (0.21.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-lmdb (0.23.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-mongo (0.23.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-mysql2 (0.29.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-helpers-mysql
+      opentelemetry-helpers-sql
+      opentelemetry-helpers-sql-obfuscation
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-net_http (0.24.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-pg (0.30.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-helpers-sql
+      opentelemetry-helpers-sql-obfuscation
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-que (0.9.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-racecar (0.4.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-rack (0.27.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-rails (0.37.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-action_mailer (~> 0.4.0)
+      opentelemetry-instrumentation-action_pack (~> 0.13.0)
+      opentelemetry-instrumentation-action_view (~> 0.9.0)
+      opentelemetry-instrumentation-active_job (~> 0.8.0)
+      opentelemetry-instrumentation-active_record (~> 0.9.0)
+      opentelemetry-instrumentation-active_storage (~> 0.1.0)
+      opentelemetry-instrumentation-active_support (~> 0.8.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+      opentelemetry-instrumentation-concurrent_ruby (~> 0.22.0)
+    opentelemetry-instrumentation-rake (0.3.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-rdkafka (0.7.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-redis (0.26.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-resque (0.6.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-restclient (0.24.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-ruby_kafka (0.22.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-sidekiq (0.26.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+    opentelemetry-instrumentation-sinatra (0.26.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.23.0)
+      opentelemetry-instrumentation-rack (~> 0.21)
+    opentelemetry-instrumentation-trilogy (0.61.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-helpers-mysql
+      opentelemetry-helpers-sql
+      opentelemetry-helpers-sql-obfuscation
+      opentelemetry-instrumentation-base (~> 0.23.0)
+      opentelemetry-semantic_conventions (>= 1.8.0)
+    opentelemetry-registry (0.4.0)
+      opentelemetry-api (~> 1.1)
+    opentelemetry-sdk (1.9.0)
+      opentelemetry-api (~> 1.1)
+      opentelemetry-common (~> 0.20)
+      opentelemetry-registry (~> 0.2)
+      opentelemetry-semantic_conventions
+    opentelemetry-semantic_conventions (1.36.0)
+      opentelemetry-api (~> 1.0)
     optimist (3.2.1)
     os (1.1.4)
     ostruct (0.6.3)
@@ -1452,6 +1705,9 @@ DEPENDENCIES
   openproject-two_factor_authentication!
   openproject-webhooks!
   openproject-xls_export!
+  opentelemetry-exporter-otlp (~> 0.30.0)
+  opentelemetry-instrumentation-all (~> 0.81.0)
+  opentelemetry-sdk (~> 1.9)
   overviews!
   ox
   paper_trail (~> 16.0.0)
@@ -1702,6 +1958,16 @@ CHECKSUMS
   google-apis-gmail_v1 (0.45.0) sha256=28b12356de6b78e136b5290976633978b23dc0013797b0d25f49bd36882cde78
   google-cloud-env (2.3.1) sha256=0faac01eb27be78c2591d64433663b1a114f8f7af55a4f819755426cac9178e7
   google-logging-utils (0.2.0) sha256=675462b4ea5affa825a3442694ca2d75d0069455a1d0956127207498fca3df7b
+  google-protobuf (4.32.1) sha256=d9ec3f52a283802055647af5d824dcdfe0a791c6ecbad6a514442f40759015e7
+  google-protobuf (4.32.1-aarch64-linux-gnu) sha256=b2254c50085b86a0395b2adea11d9742fe703a135b67689991dcc03a1c9bc179
+  google-protobuf (4.32.1-aarch64-linux-musl) sha256=a9cdae8e14ccb781b40efb996ec7ca151fe8521c46cfd40e2b05d62867ab555c
+  google-protobuf (4.32.1-arm64-darwin) sha256=ef2b6c138847f03af94eeed58ee8aaf00263dd66490ec659202c06dc3b2f0c29
+  google-protobuf (4.32.1-x86-linux-gnu) sha256=f8509ecd53e2e494222105a2ebf451ab5ac9f4d014ccd7c8c81699984f3295c2
+  google-protobuf (4.32.1-x86-linux-musl) sha256=3214d6025b4e4a995233c6500e38f954dfddffc985bb59d3cfe144d0b965fc00
+  google-protobuf (4.32.1-x86_64-darwin) sha256=2e1fe608d8bbd09514258d84e2a281178214473f95f248ab82e0553c5ab6a8a3
+  google-protobuf (4.32.1-x86_64-linux-gnu) sha256=2d209c1980dbdeb4114c7d839a3305fb78dc90bde42fb9a22974c8a4841e0263
+  google-protobuf (4.32.1-x86_64-linux-musl) sha256=d5314aea8817bd372177205667b4f4442a5884212bcaccb1ba569ec8a1a06ec4
+  googleapis-common-protos-types (1.21.0) sha256=c91b6f2b8a2dab6af4e249e7be8e8d5fe174d6e58e065803d740031880179d8f
   googleauth (1.15.0) sha256=122ae61813805a1cfdf225638f33d354ca6078be17e9712669667226a7243bcf
   grape (2.4.0) sha256=3d59673e80f11d49ba86270b78344e5348dc057b318c2bbc1c01f3532f9b6aec
   grape_logging (3.0.0) sha256=7b62d984ce96df15d120508668debe307e6a59ac1c511f1d9b5f3b4bea793e13
@@ -1821,6 +2087,61 @@ CHECKSUMS
   openproject-xls_export (1.0.0)
   openssl (3.3.0) sha256=ff3a573fc97ab30f69483fddc80029f91669bf36532859bd182d1836f45aee79
   openssl-signature_algorithm (1.3.0) sha256=a3b40b5e8276162d4a6e50c7c97cdaf1446f9b2c3946a6fa2c14628e0c957e80
+  opentelemetry-api (1.6.0) sha256=c21f2898365d5e759d52da7b7c11f04b36d680f7e47c29c7a93b0c5631819867
+  opentelemetry-common (0.22.0) sha256=ce5e96a0f838d67eb70a1d32e02bdbe7b8f41767bc71994d73b299a8b0c5878d
+  opentelemetry-exporter-otlp (0.30.0) sha256=07cb0446bb782dfcf7cc27d2d6ebcf9aef1a4585b3f4952be6276a1e77d5ba97
+  opentelemetry-helpers-mysql (0.2.0) sha256=dd05f5f40bf5169cd3b8fef355fb050506542fa6b32ace19e8124f6dec5b261f
+  opentelemetry-helpers-sql (0.1.1) sha256=19e861c2c69d1b61852ee4fba3ef7c0d06e6885ee4156dc06fb963a3e2eedb8d
+  opentelemetry-helpers-sql-obfuscation (0.3.0) sha256=f5d866d58f98267b5302be479c9dddad25ddf7db19030d44fb5ab93025ea9e4b
+  opentelemetry-instrumentation-action_mailer (0.4.0) sha256=e8b5959572038dc0367300b5425f2f7b297fc0b372a966832b1aad4af06ee9a2
+  opentelemetry-instrumentation-action_pack (0.13.0) sha256=c40b706faac373afa924e658a04d0fe864cf4c754e2df21a1361309b39e4b76f
+  opentelemetry-instrumentation-action_view (0.9.0) sha256=4b434644650bf66c0bab9984c0b1f2e2c474ed0b0d5638f5153677efe8bcc561
+  opentelemetry-instrumentation-active_job (0.8.0) sha256=9d5d884e05421ca9444635ac9c96886bccf1a042d4ee5d3282f620d0acd5613d
+  opentelemetry-instrumentation-active_model_serializers (0.22.0) sha256=fdfd0fafb1c90e4f121c4c215540abdc928f72c4de4b0643db870459d56c4bbe
+  opentelemetry-instrumentation-active_record (0.9.0) sha256=9cbcb92dbfd48fa7bbf7524e3567e334f1773055467e9c6fbeaa49d911a60140
+  opentelemetry-instrumentation-active_storage (0.1.1) sha256=a654926abbeca00ec1fe942f9e4ded610530e23630d2cfb88fb876eabef4a703
+  opentelemetry-instrumentation-active_support (0.8.0) sha256=9be102354e420ed08a6841d113e39d9c5480ed35940fe7268c7297656167d999
+  opentelemetry-instrumentation-all (0.81.0) sha256=377215f5d0e81e44ec3266beaf9a673b9224f7705dba4ba1be44be3d209ead79
+  opentelemetry-instrumentation-anthropic (0.1.0) sha256=b40c0e61e751543b28aa40e1643990f9850e605e5fe277e3a444eab47c44f7ab
+  opentelemetry-instrumentation-aws_lambda (0.3.0) sha256=00e4ccec484f598a65ce4aa7ea9caccaeab3b8c6219690d93072c814299706b4
+  opentelemetry-instrumentation-aws_sdk (0.8.2) sha256=27be7a1f2bba7a887d3c9ab5ec734a439e6f458e592450ddf0761d6f07c3546f
+  opentelemetry-instrumentation-base (0.23.0) sha256=b3e103ceea2ccf3e6269a394938a5bc239c80d113869fe2b2ac49ba27c3c1c50
+  opentelemetry-instrumentation-bunny (0.22.0) sha256=8cb0c40937a30e53fd0df3af400fc49a829d2ec0eb14f3a2a28d052d8207eaf5
+  opentelemetry-instrumentation-concurrent_ruby (0.22.0) sha256=fba61e55b4f66331a53ad82cb0a0c225a1ddea9a4f693fcf2e9fa7e7199c6897
+  opentelemetry-instrumentation-dalli (0.27.3) sha256=815e5d9588d72103af18be3151a558cd237f31220b3cc11295cc2a80e740bf09
+  opentelemetry-instrumentation-delayed_job (0.23.0) sha256=11aa70f920c5872b687f33d966898416f14d7c0c244ff7d6f3be1566d8a133fc
+  opentelemetry-instrumentation-ethon (0.23.1) sha256=9cdc339bcfca1b4c9da3f71051d3542ee46567a7326331c0eb615db8240df625
+  opentelemetry-instrumentation-excon (0.24.0) sha256=fc26fed2817c36bf5cc628f64c52f8d6fc5af66c538b68feb820e401d761801e
+  opentelemetry-instrumentation-faraday (0.28.0) sha256=d35ceafb5d2e18c398c601c8b7c06be35db00e771f7fe78f56ebc65aacfe6c66
+  opentelemetry-instrumentation-grape (0.3.0) sha256=80c375301c85e9a94fb12836252792d199a30831502ffd607239b824f7f5490c
+  opentelemetry-instrumentation-graphql (0.29.0) sha256=b4f8e9f3f1a06268fb53f0077a67e1437f07d1946fb1d9e1d5ce8861228089e2
+  opentelemetry-instrumentation-grpc (0.2.1) sha256=4d1a4ee8b5e41636da942954b90b8d974922c6a17cf896708c3d539b815ab992
+  opentelemetry-instrumentation-gruf (0.3.0) sha256=9c45dd36ccee3bbc0f43ab1bf6c3ddee4eaa4b16ab4033658dbc7ec10f9cdee7
+  opentelemetry-instrumentation-http (0.25.1) sha256=70424c12fa60f850f0a8218d3ce425ed9bd7d548cd43b5572876b3301f85bb3f
+  opentelemetry-instrumentation-http_client (0.24.0) sha256=94ca0c374cb361687e2944db97a8a51f53370ba3e4cf676856b71baa25377870
+  opentelemetry-instrumentation-httpx (0.3.0) sha256=5f5e408a89da31c8592d66df61a8e552c695498d25219ee33eddbd378858d3ce
+  opentelemetry-instrumentation-koala (0.21.0) sha256=3c43dc8de4c111463c897602696c548c2d70cc51ccf30b19ec9452184b4ac8ba
+  opentelemetry-instrumentation-lmdb (0.23.0) sha256=617ecfffc389dca3af5afbce58d0e8380b95e158896d00d22cec39b5b75544d7
+  opentelemetry-instrumentation-mongo (0.23.0) sha256=1d500469c107fb68047802ba3d52d8ab023ee0b79ded6236135bbd2833a2ee4b
+  opentelemetry-instrumentation-mysql2 (0.29.1) sha256=26bf2e5a8faa1a53648ee88a2fb1cc8eae57e93794f8064247da6f6556ce487e
+  opentelemetry-instrumentation-net_http (0.24.0) sha256=49b3222041201b19932f13b81bb9f1c8fdeba450c644f11e4428ccf4c92662ee
+  opentelemetry-instrumentation-pg (0.30.1) sha256=85353ad70012e3a2e196c66a2c8029e791746e028997fcf43bedfdad3ac74f27
+  opentelemetry-instrumentation-que (0.9.0) sha256=bc8038459d44de7d2320a4d290ad86725ffdc1c1d28cc508928ad7fa44c8a704
+  opentelemetry-instrumentation-racecar (0.4.0) sha256=283e00fa350eb8677fd1e6e6768bbce060e48fb89a635782c12691d889f42dc2
+  opentelemetry-instrumentation-rack (0.27.1) sha256=bdde889f054b00d7da602ffc54dd60d9503477291489dccf3bea6fe410ead26e
+  opentelemetry-instrumentation-rails (0.37.0) sha256=38cf14e0e019f7b756a6c40487a611cb091b4ca6d979b74313a250146e7c19ab
+  opentelemetry-instrumentation-rake (0.3.1) sha256=dd12d24373a6f293de51ecff8986f2e341a24ad28b2dbabac21f2ccfbb43dcd9
+  opentelemetry-instrumentation-rdkafka (0.7.0) sha256=c1fec9f85234498bd4895d9453ea382f0a8e80b314ae722bd021926e87710dc2
+  opentelemetry-instrumentation-redis (0.26.1) sha256=315efba5560c943dfe8ea41b16ab162418fc7423c45bb36c4bcc91a310467ba0
+  opentelemetry-instrumentation-resque (0.6.0) sha256=b61d5c3fb3d3e96a1dc34cb242addfdd8cf8f6471a9518d3ffa57d26b99e917f
+  opentelemetry-instrumentation-restclient (0.24.0) sha256=5b3022b2673302e006882f0edab7072ad8e6e85d1a15bd7bef8b20c4934115e4
+  opentelemetry-instrumentation-ruby_kafka (0.22.0) sha256=a79f2138ab0daf251ab9b7721b9d91938a8b63b8ee5375173b95ce5a6cc65ada
+  opentelemetry-instrumentation-sidekiq (0.26.1) sha256=853aea9d88642643b29a8ed818e290e374586f72f304c785b672b9086360f3d2
+  opentelemetry-instrumentation-sinatra (0.26.0) sha256=19798dc55f965e520c14f808489cca8ad808b1d5539f53e771c152a9501d45a7
+  opentelemetry-instrumentation-trilogy (0.61.1) sha256=51b4dc951e3830391b6043000eb79ad6a23eaf6fd8b7892e02caa3c1d9f94cb0
+  opentelemetry-registry (0.4.0) sha256=903fa6bfaa29eac1c1d73a4fdd29b850977b5353b84b8cdff11222c00ad2968f
+  opentelemetry-sdk (1.9.0) sha256=46437c5abf683c6664284fc78067d1272529ed6574bb05b70c9a1f7aba13e0dc
+  opentelemetry-semantic_conventions (1.36.0) sha256=c1b1607dbc7853aac7f9e23f6e8b76969c45b07f2b812a4aa4383c19a3b0f617
   optimist (3.2.1) sha256=8cf8a0fd69f3aa24ab48885d3a666717c27bc3d9edd6e976e18b9d771e72e34e
   os (1.1.4) sha256=57816d6a334e7bd6aed048f4b0308226c5fb027433b67d90a9ab435f35108d3f
   ostruct (0.6.3) sha256=95a2ed4a4bd1d190784e666b47b2d3f078e4a9efda2fccf18f84ddc6538ed912
diff --git a/config/constants/settings/definition.rb b/config/constants/settings/definition.rb
index 250735d44e8..b6b6a89265c 100644
--- a/config/constants/settings/definition.rb
+++ b/config/constants/settings/definition.rb
@@ -28,6 +28,7 @@
 # See COPYRIGHT and LICENSE files for more details.
 #++
 
+# rubocop:disable Metrics/CollectionLiteralLength
 module Settings
   class Definition
     ENV_PREFIX = "OPENPROJECT_"
@@ -882,6 +883,10 @@ module Settings
         allowed: (0..),
         default: 20
       },
+      opentelemetry_enabled: {
+        description: "Enable OpenTelemetry metrics",
+        default: false
+      },
       rate_limiting: {
         default: {},
         description: "Configure rate limiting for various endpoint rules. See configuration documentation for details."
@@ -1658,3 +1663,4 @@ module Settings
     end
   end
 end
+# rubocop:enable Metrics/CollectionLiteralLength
diff --git a/config/initializers/opentelemetry.rb b/config/initializers/opentelemetry.rb
new file mode 100644
index 00000000000..f83f2da02df
--- /dev/null
+++ b/config/initializers/opentelemetry.rb
@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+#-- copyright
+# OpenProject is an open source project management software.
+# Copyright (C) the OpenProject GmbH
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License version 3.
+#
+# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
+# Copyright (C) 2006-2013 Jean-Philippe Lang
+# Copyright (C) 2010-2013 the ChiliProject Team
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+#
+# See COPYRIGHT and LICENSE files for more details.
+#++
+
+Rails.application.configure do
+  if OpenProject::Configuration.opentelemetry_enabled?
+    require "opentelemetry/sdk"
+    require "opentelemetry-exporter-otlp"
+    require "opentelemetry-instrumentation-all"
+
+    OpenTelemetry::SDK.configure(&:use_all)
+  end
+end