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github-act-runner

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A reverse engineered github actions compatible self-hosted runner using nektos/act to execute your workflow steps. Unlike the official actions/runner, this works on more systems like freebsd.

Usage

Dependencies

Actions TypeHostJobContainer (only Linux, Windows, macOS)
(composite) run stepsbash (preferred), sh or explicit shell in your PATH (prior running the runner). On windows are pwsh (preferred) and powershell the default shells instead of bash or shDocker (*1), sh or explicit shell in your PATH (inside your container image)
nodejs actionsnode (*2) in your PATH (prior running the runner)Docker (*1), node (*2) in your PATH (inside your container image)
docker actionsNot availableDocker (*1)
service containerNot availableDocker (*1) v0.7.0
composite actions with usesv0.1.0v0.1.0
composite actions with ifv0.1.0v0.1.0
composite actions with continue-on-errorv0.1.0v0.1.0

Docker Daemon via DOCKER_HOST

(*1) Reachable docker daemon use DOCKER_HOST to specify a remote host.

NodeJS via PATH

(*2) For best compatibility with existing nodejs actions, please add nodejs in version 12 to your PATH, newer nodejs versions might lead to workflow failures.

Usage for github releases

Follow the instruction of https://github.com/ChristopherHX/github-act-runner/releases/latest.

Usage for debian repository

Add debian repository

/etc/apt/sources.list.d/github-act-runner.list file:

deb https://gagis.hopto.org/repo/chrishx/deb all main

Import repository public key

curl -sS https://gagis.hopto.org/repo/chrishx/pubkey.gpg | sudo tee -a /etc/apt/trusted.gpg.d/chrishx-github-act-runner.asc

Install the runner

sudo apt update
sudo apt install github-act-runner

Add new runner

github-act-runner new --url <url> --name <runner-name> --labels <labels> --token <runner-registration-token>

where

The new runner will be registered and started as background service.

See help:

github-act-runner --help

For more info about managing runners.

Usage from source

You need at least go 1.21 to use this runner from source.

Getting Source

git clone https://github.com/ChristopherHX/github-act-runner.git --recursive

Update Source

git pull
git submodule update

Configure

go run . configure --url <github-repo-or-org-or-enterprise> --name <name of this runner> -l label1,label2 --token <runner registration token>

<github-repo-or-org-or-enterprise>

E.g. https://github.com/ChristopherHX/github-act-runner for this repo

<name of this runner>

E.g. Test

<runner registration token>

You find the token in
Repository<github-repo>/settings/actions/runners/new
Organization<github-url>/organizations/<github-org-name>/settings/actions/runners/new
EnterpriseIn action runner settings of your enterprise

E.g. AWWWWWWWWWWWWWAWWWWWWAWWWWWWW

Labels

Replace label1,label2 with a custom list of runner labels.

Run

go run . run

Breaking changes in 0.6.0

Breaking changes in 0.7.0

Known Limitations

How does it work?

This runner implements the same protocol as the actions/runner in a different way, as such it can be used as a self-hosted runner exactly like the official one. To get this working, I initially built an actions service replacement ChristopherHX/runner.server for the official actions/runner. My own actions service allowed me to implement the base protocol for this runner and debug how the protocol is serializeing and parsing json messages, while still being incompatible with github. After testing against github, the first thing happend was loosing the ability to run any github action workflows on my test repository. My invalid attempts to register a custom runner caused unrecoverable Internal Server Errors on githubs side, I decided to delete this test repository. After some work everything worked and finally it is safe to register this runner against github. To execute steps this runner translates the github actions job request to be compatible with a modified version of nektos/act ( ChristopherHX/act ), which adds a local task runner without the need for docker and increased platform support, also the log output of act gets redirected to github for live logs and storing log files.

Does this runner work without github?

Yes, you can use this runner together with ChristopherHX/runner.server locally on your PC without depending on compatibility with github. Also CI tests for this runner are using ChristopherHX/runner.server, this avoids requiring a PAT for github to run tests and enshures that you are always able to run it locally without github.