A daemon that connects to a Forgejo instance and runs jobs for continuous integration. The installation and usage instructions are part of the Forgejo documentation https://forgejo.org/docs/next/admin/actions/
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Mathieu Fenniak 6721a406e5 fix: eliminate log data loss caused by LXC & PTY buffer (#1287)
This PR is based upon #1286 which adds an environmental sanity check -- that test should pass as it's own PR first to ensure that this PR is not causing any behavioural regressions that could be detected by it.

Alternative fix for #1258.  This PR replaces the use of `lxc-attach` with `nsenter` to get into the LXC container and execute workflow commands.  `nsenter` does not have the short-write behaviour that was observed with `lxc-attach` where a failure to write stdout data to the pty would be ignored -- `nsenter` simply [`execvp`](6766bbf17a/sys-utils/nsenter.c (L853)) or [`execl`](6766bbf17a/lib/exec_shell.c (L42C2-L42C7)) the child process and allows it to inherit its FDs.

The in-memory buffer which was intended to pull data out of the PTY buffer as fast as possible is removed in this PR, restoring normal backpressure on stdout.

<!--start release-notes-assistant-->
<!--URL:https://code.forgejo.org/forgejo/runner-->
- bug fixes
  - [PR](https://code.forgejo.org/forgejo/runner/pulls/1287): <!--number 1287 --><!--line 0 --><!--description Zml4OiBlbGltaW5hdGUgbG9nIGRhdGEgbG9zcyBjYXVzZWQgYnkgTFhDICYgUFRZIGJ1ZmZlcg==-->fix: eliminate log data loss caused by LXC & PTY buffer<!--description-->
<!--end release-notes-assistant-->

Reviewed-on: https://code.forgejo.org/forgejo/runner/pulls/1287
Reviewed-by: Andreas Ahlenstorf <aahlenst@noreply.code.forgejo.org>
Co-authored-by: Mathieu Fenniak <mathieu@fenniak.net>
Co-committed-by: Mathieu Fenniak <mathieu@fenniak.net>
2026-01-20 21:39:59 +00:00
.forgejo Update https://data.forgejo.org/actions/setup-forgejo action to v3.1.1 (#1308) 2026-01-19 01:46:48 +00:00
act fix: eliminate log data loss caused by LXC & PTY buffer (#1287) 2026-01-20 21:39:59 +00:00
contrib Restore contrib/forgejo-runner.service (#772) 2025-07-30 22:16:05 +00:00
examples Update forgejo-runner to v12.5.3 (#1305) 2026-01-17 21:09:00 +00:00
internal fix: support Forgejo returning AdditionalTasks but not Task (#1303) 2026-01-17 18:51:13 +00:00
release-notes feat: add the runner validate subcommand (#757) 2025-07-31 05:37:12 +00:00
testutils feat: add the runner validate subcommand (#757) 2025-07-31 05:37:12 +00:00
.dockerignore [FORGEJO] build forgejo-runner 2023-08-23 14:44:47 +02:00
.editorconfig Add .editorconfig and .gitattributes (#186) 2023-05-13 23:51:22 +08:00
.gitattributes Add .editorconfig and .gitattributes (#186) 2023-05-13 23:51:22 +08:00
.gitignore fix: unbreak the build for platforms w/o docker support (#1294) 2026-01-14 20:20:05 +00:00
.golangci.yml test: run lint-check during CI, add forbidigo, cleanup linter exclusions (#1181) 2025-11-23 15:01:52 +00:00
.pre-commit-hooks.yaml fix(pre-commit): don’t default verbose to on (#1015) 2025-09-18 12:02:07 +00:00
Dockerfile Update data.forgejo.org/oci/alpine Docker tag to v3.23 (#1288) 2026-01-14 16:12:06 +00:00
go.mod Update module github.com/moby/go-archive to v0.2.0 (#1290) 2026-01-19 02:46:59 +00:00
go.sum Update module github.com/moby/go-archive to v0.2.0 (#1290) 2026-01-19 02:46:59 +00:00
LICENSE chore: change the license to GPLv3-or-later (#773) 2025-09-04 09:26:12 +00:00
main.go fix: unrecoverable errors in artifactcache should have non-zero exit code (#1222) 2025-12-15 14:50:17 +00:00
Makefile chore: ensure all tests are run (#1261) 2026-01-13 22:38:02 +00:00
README.md chore: change the license to GPLv3-or-later (#773) 2025-09-04 09:26:12 +00:00
RELEASE-NOTES.md chore: release notes are now published together with the release (#775) 2025-07-31 08:02:20 +00:00
renovate.json chore(renovate): change name for lxc node version 2026-01-13 11:29:01 +01:00

Forgejo Runner

A daemon that connects to a Forgejo instance and runs jobs for continuous integration. The installation and usage instructions are part of the Forgejo documentation.

Reporting security-related issues

Sensitive security-related issues should be reported to security@forgejo.org using encryption.

License

The Forgejo runner is distributed under the terms of the GPL version 3.0 or any later version.

Architectures & OS

The Forgejo runner is supported and tested on amd64 and arm64 (binaries and containers) on Operating Systems based on the Linux kernel.

Work may be in progress for other architectures and you can browse the corresponding issues to figure out how they make progress. If you are interested in helping them move forward, open an issue. The most challenging part is to setup and maintain a native runner long term. Once it is supported by Forgejo, the runner is expected to be available 24/7 which can be challenging. Otherwise debugging any architecture specific problem won't be possible.

Hacking

The Forgejo runner is a dependency of the setup-forgejo action. See the full dependency graph for a global view.

Building

  • Install Go and make(1)
  • make build

Linting

  • make lint-check
  • make lint # will fix some lint errors

Testing

The workflow that runs in the CI uses similar commands.

Without a Forgejo instance

  • Install Docker
  • make test integration-test

The TestRunner_RunEvent test suite contains most integration tests with real-world workflows and is time-consuming to run. During development, it is helpful to run a specific test through a targeted command such as this:

  • go test -count=1 -run='TestRunner_RunEvent$/local-action-dockerfile$' ./act/runner

With a Forgejo instance

  • Run a Forgejo instance locally (for instance at http://0.0.0.0:8080) and create as shared secret
export FORGEJO_RUNNER_SECRET='AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA'
export FORGEJO_URL=http://0.0.0.0:8080
forgejo forgejo-cli actions register --labels docker --name therunner --secret $FORGEJO_RUNNER_SECRET
  • make test integration-test # which will run addional tests because FORGEJO_URL is set

end-to-end

  • Follow the instructions from the end-to-end tests to run actions tests locally.
  • ./end-to-end.sh actions_teardown # stop the Forgejo and runner daemons running in the end-to-end environment
  • ( cd ~/clone-of-the-runner-repo ; make build ; cp forgejo-runner /tmp/forgejo-end-to-end/forgejo-runner ) # install the runner built from sources
  • ./end-to-end.sh actions_setup 13.0 # start Forgejo v13.0 and the runner daemon in the end-to-end environment
  • ./end-to-end.sh actions_verify_example echo # run the echo workflow
  • xdg-open http://127.0.0.1:3000/root/example-echo/actions/runs/1 # see the logs workflow
  • less /tmp/forgejo-end-to-end/forgejo-runner.log # analyze the runner logs
  • less /tmp/forgejo-end-to-end/forgejo-work-path/log/forgejo.log # analyze the Forgejo logs