Prometheus instrumentation library for Go applications
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Arianna Vespri 3ad272204b
Add default Go runtime metrics for /gc/gogc:percent, /gc/gomemlimit:bytes, /sched/gomaxprocs:threads (#1559)
* Add go_gomaxprocs, go_gogc_percent and go_gomemlimit to the default Go runtime metrics

Signed-off-by: Arianna Vespri <arianna.vespri@yahoo.it>

* Move newly added metrics out of base metrics and into goCollector

Signed-off-by: Arianna Vespri <arianna.vespri@yahoo.it>

* Rethink struct for newly added metrics, adapt and add tests

Signed-off-by: Arianna Vespri <arianna.vespri@yahoo.it>

* Simplify new metrics reading

Signed-off-by: Arianna Vespri <arianna.vespri@yahoo.it>

* Correct loop, add debugging lines

Signed-off-by: Arianna Vespri <arianna.vespri@yahoo.it>

* Make goRuntimeEnvVarsMetrics function Go version dependent

Signed-off-by: Arianna Vespri <arianna.vespri@yahoo.it>

* Fix go mod

Signed-off-by: Arianna Vespri <arianna.vespri@yahoo.it>

* Remove debuggin line

Signed-off-by: Arianna Vespri <arianna.vespri@yahoo.it>

* Move default runtime metrics into the runtime metrics flow, change tests accordingly

Signed-off-by: Arianna Vespri <arianna.vespri@yahoo.it>

* Go version expected default runtime metrics map for tests

Signed-off-by: Arianna Vespri <arianna.vespri@yahoo.it>

* 1.21 update.

Signed-off-by: bwplotka <bwplotka@gmail.com>

* Addressed comments on Arianna's PR.

Signed-off-by: bwplotka <bwplotka@gmail.com>

* Use default GoCollector func in test

Signed-off-by: Arianna Vespri <arianna.vespri@yahoo.it>

---------

Signed-off-by: Arianna Vespri <arianna.vespri@yahoo.it>
Signed-off-by: bwplotka <bwplotka@gmail.com>
Co-authored-by: bwplotka <bwplotka@gmail.com>
2024-08-09 20:27:25 +01:00
.bingo Fixed README & CHANGELOG; Added fmt makefile command (+bingo) for easier contributions. (#1289) 2023-06-13 14:54:49 +01:00
.github Update common Prometheus files (#1573) 2024-08-09 11:29:19 +01:00
api deps: Updated to prometheus/common to 0.55 (#1566) 2024-07-29 15:05:07 +01:00
dagger ci: daggerize test and lint pipelines (#1534) 2024-08-07 14:49:16 +02:00
examples fix: remove redundant go module in middleware example (#1492) 2024-04-08 09:32:51 +02:00
internal/github.com/golang/gddo feat: Support zstd compression (#1496) 2024-06-07 15:56:19 +01:00
prometheus Add default Go runtime metrics for /gc/gogc:percent, /gc/gomemlimit:bytes, /sched/gomaxprocs:threads (#1559) 2024-08-09 20:27:25 +01:00
tutorials/whatsup tutorials: Renamed for consistency + fixed tutorial code. (#1569) 2024-07-31 14:06:25 +02:00
.gitignore Cut v1.15.0 (#1249) 2023-04-13 12:51:09 +02:00
.golangci.yml ci: daggerize test and lint pipelines (#1534) 2024-08-07 14:49:16 +02:00
CHANGELOG.md Rephrase incompatibility with common v0.48.0 2024-02-28 19:31:27 -03:00
CODE_OF_CONDUCT.md Update common Prometheus files (#1045) 2022-05-05 07:46:54 +02:00
CONTRIBUTING.md chore: Remove half-implemented changelog automation (#1564) 2024-07-19 17:12:40 +01:00
Dockerfile prometheus: Fix convention violating names for generated collector metrics (#1048) 2022-05-09 10:33:45 +02:00
LICENSE License cleanup 2015-01-22 16:13:15 +01:00
MAINTAINERS.md Update MAINTAINERS.md (#1362) 2023-10-05 14:14:58 +01:00
Makefile ci: daggerize test and lint pipelines (#1534) 2024-08-07 14:49:16 +02:00
Makefile.common Update common Prometheus files 2024-06-25 17:47:46 +00:00
NOTICE Remove inlined upstream code (#1539) 2024-06-20 13:05:41 +02:00
README.md Update README.md (#1556) 2024-07-08 17:26:06 +01:00
SECURITY.md Update common Prometheus files (#1045) 2022-05-05 07:46:54 +02:00
VERSION Add 1.19.0 changelog (#1451) 2024-02-27 15:33:22 +01:00
dagger.json ci: daggerize test and lint pipelines (#1534) 2024-08-07 14:49:16 +02:00
generate-go-collector.bash Auto-update Go Collector Metrics for new Go versions (#1476) 2024-03-26 12:42:34 +00:00
go.mod build(deps): bump golang.org/x/sys from 0.21.0 to 0.22.0 2024-08-01 09:52:29 +00:00
go.sum build(deps): bump golang.org/x/sys from 0.21.0 to 0.22.0 2024-08-01 09:52:29 +00:00
supported_go_versions.txt Auto-update Go Collector Metrics for new Go versions (#1476) 2024-03-26 12:42:34 +00:00
update-go-version.bash feat: metrics generation workflow (#1481) 2024-04-04 08:25:38 +02:00

README.md

Prometheus Go client library

CI Go Report Card Go Reference Slack

This is the Go client library for Prometheus. It has two separate parts, one for instrumenting application code, and one for creating clients that talk to the Prometheus HTTP API.

This library requires Go1.20 or later.

The library mandates the use of Go1.20 or subsequent versions. While it has demonstrated functionality with versions as old as Go 1.17, our commitment remains to offer support and rectifications for only the most recent three major releases.

Important note about releases and stability

This repository generally follows Semantic Versioning. However, the API client in prometheus/client_golang/api/… is still considered experimental. Breaking changes of the API client will not trigger a new major release. The same is true for selected other new features explicitly marked as EXPERIMENTAL in CHANGELOG.md.

Features that require breaking changes in the stable parts of the repository are being batched up and tracked in the v2 milestone, but plans for further development of v2 at the moment.

NOTE: The initial v2 attempt is in a separate branch. We also started experimenting on a new prometheus.V2.* APIs in the 1.x's V2 struct. Help wanted!

Instrumenting applications

Go Reference

The prometheus directory contains the instrumentation library. See the guide on the Prometheus website to learn more about instrumenting applications.

The examples directory contains simple examples of instrumented code.

Client for the Prometheus HTTP API

Go Reference

The api/prometheus directory contains the client for the Prometheus HTTP API. It allows you to write Go applications that query time series data from a Prometheus server. It is still in alpha stage.

Where is model, extraction, and text?

The model packages has been moved to prometheus/common/model.

The extraction and text packages are now contained in prometheus/common/expfmt.

Contributing and community

See the contributing guidelines and the Community section of the homepage.

client_golang community is also present on the CNCF Slack #prometheus-client_golang.

For Maintainers: Release Process

To cut a minor version:

  1. Create a new branch release-<major>.<minor> on top of the main commit you want to cut the version from and push it.
  2. Create a new branch on top of the release branch, e.g. <yourname>/cut-<major>.<minor>.<patch>,
  3. Change the VERSION file.
  4. Update CHANGELOG (only user-impacting changes to mention).
  5. Create PR, and get it reviewed.
  6. Once merged, create a release with the release-<major>.<minor> tag on GitHub with the <version> title.
  7. Announce on the prometheus-announce mailing list, slack and Twitter.
  8. Merge the release branch back to the main using the "merge without squashing" approach (!).

NOTE: In case of merge conflicts, you can checkout the release branch in a new branch, e.g. <yourname>/resolve-conflicts, fix the merge problems there, and then do a PR into main from the new branch. In that way, you still get all the commits in the release branch back into main, but leave the release branch alone.

To cut the patch version:

  1. Create a branch on top of the release branch you want to use.
  2. Cherry-pick the fixes from the main branch (or add new commits) to fix critical bugs for that patch release.
  3. Follow steps 3-8 as above.