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Merge pull request 'docs: actions administration documentation' (#235) from earl-warren/website:wip-actions into main

Reviewed-on: https://codeberg.org/forgejo/website/pulls/235
Reviewed-by: Loïc Dachary <dachary@noreply.codeberg.org>
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Earl Warren 2023-05-29 08:54:10 +00:00 committed by Caesar Schinas
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---
layout: '~/layouts/Markdown.astro'
title: 'Forgejo Actions'
license: 'CC-BY-SA-4.0'
---
`Forgejo Actions` provides continuous integration driven from the files in the `.forgejo/workflows` directory of a repository. It is still experimental and disabled by default. It can be activated by adding the following to `app.ini`:
```yaml
[actions]
ENABLED = true
```
`Forgejo` itself does not run the jobs, it relies on the [Forgejo runner](https://code.forgejo.org/forgejo/runner) to do so.
# Forgejo runner
## Installation
Download the latest [binary release](https://code.forgejo.org/forgejo/runner/releases) and verify their signature:
```shell
$ wget -O forgejo-runner https://code.forgejo.org/forgejo/runner/releases/download/v2.0.3/forgejo-runner-amd64
$ chmod +x forgejo-runner
$ wget -O forgejo-runner.asc https://code.forgejo.org/forgejo/runner/releases/download/v2.0.3/forgejo-runner-amd64.asc
$ gpg --keyserver keys.openpgp.org --recv EB114F5E6C0DC2BCDD183550A4B61A2DC5923710
$ gpg --verify forgejo-runner.asc forgejo-runner
Good signature from "Forgejo <contact@forgejo.org>"
aka "Forgejo Releases <release@forgejo.org>"
```
### Docker
For jobs to run in containers, the `Forgejo runner` needs access to [Docker](https://docs.docker.com/engine/install/).
### LXC
For jobs to run in LXC containers, the `Forgejo runner` needs passwordless sudo access on a Debian GNU/Linux bookworm system where [LXC](https://linuxcontainers.org/lxc/) is installed. The [LXC helpers](https://code.forgejo.org/forgejo/lxc-helpers/) can be used as follows to create a suitable container:
```shell
$ git clone https://code.forgejo.org/forgejo/lxc-helpers
$ ./lxc-helpers/lxc-helpers.sh lxc_container_create myrunner
$ ./lxc-helpers/lxc-helpers.sh lxc_container_start myrunner
```
The `Forgejo runner` can then be installed and run within the `myrunner` container.
```shell
$ ./lxc-helpers/lxc-helpers.sh lxc_container_run bash
# apt-get install docker.io wget gnupg2
# wget -O forgejo-runner https://code.forgejo.org/forgejo/runner/releases/download/v2.0.3/forgejo-runner-amd64
...
```
**Warning:** LXC containers do not provide a level of security that makes them safe for potentially malicious users to run jobs. They provide an excellent isolation for jobs that may accidentally damage the system they run on.
## Registration
The `Forgejo runner` needs to connect to a `Forgejo` instance and must register itself before doing so. It will be given permission to read the repositories and send back information to `Forgejo` such as the logs or its status. A special kind of token is needed and can be obtained from the `Create new runner` button:
- in `/admin/runners` to gain access to all repositories.
- in `/{owner}/{repository}/settings/actions/runners` to gain access to a single repository.
For instance, using a token obtained for a test repository from `next.forgejo.org`:
```shell
forgejo-runner register --no-interactive --token {TOKEN} --name runner --instance https://next.forgejo.org --labels ubuntu-latest:docker://node:16-buster,self-hosted
INFO Registering runner, arch=amd64, os=linux, version=2.0.3.
WARN Runner in user-mode.
DEBU Successfully pinged the Forgejo instance server
INFO Runner registered successfully.
```
It will create a `.runner` file that looks like:
```json
{
"WARNING": "This file is automatically generated. Do not edit.",
"id": 6,
"uuid": "fcd0095a-291c-420c-9de7-965e2ebaa3e8",
"name": "runner",
"token": "{TOKEN}",
"address": "https://next.forgejo.org",
"labels": ["ubuntu-latest:docker://node:16-buster", "self-hosted"]
}
```
## Running
Once the `Forgejo runner` is successfully registered, it can be run from the directory in which the `.runner` file is found with:
```shell
$ forgejo-runner daemon
INFO[0000] Starting runner daemon
```
Adding the `.forgejo/workflows/demo.yaml` file to the test repository:
```
on: [push]
jobs:
test:
runs-on: ubuntu-latest
steps:
- run: echo All Good
```
Will send a job request to the `Forgejo runner` that will display logs such as:
```shell
...
INFO[2023-05-28T18:54:53+02:00] task 29 repo is earl-warren/test https://code.forgejo.org https://next.forgejo.org
...
[/test] [DEBUG] Working directory '/workspace/earl-warren/test'
| All Good
[/test] ✅ Success - Main echo All Good
```
It will also show a similar output in the `Actions` tab of the repository.
If no `Forgejo runner` is available, `Forgejo` will wait for one to connect and submit the job as soon as it is available.
## Job environment
The jobs defined in the files found in `.forgejo/workflows` specify the environment they need to run with `runs-on`. Each `Forgejo runner` declares, with the `--labels` option, which one they support so `Forgejo` knows to submit jobs accordingly. For instance if a job has:
```yaml
runs-on: ubuntu-latest
```
the job will be submitted to a runner that registered with `--labels ubuntu-latest:docker://node:16-buster`.
### Docker
If `runs-on` is matched to a label that contains `docker://`, the rest of it is interpreted as a container image. The runner will execute all the steps, as root, within a container created from that image.
### LXC
If `runs-on` is `self-hosted`, the runner will execute all the steps, as root, within a Debian GNU/Linux bullseye LXC container.

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@ -1330,38 +1330,8 @@ PROXY_HOSTS = *.github.com
## Actions (`actions`)
- `ENABLED`: **false**: Enable/Disable actions capabilities
- `DEFAULT_ACTIONS_URL`: **https://codeberg.org**: Default address to get action plugins, e.g. the default value means downloading from "https://codeberg.org/actions/checkout" for "uses: actions/checkout@v3"
`DEFAULT_ACTIONS_URL` indicates where should we find the relative path action plugin. i.e. when use an action in a workflow file like
```yaml
name: versions
on:
push:
branches:
- main
- releases/*
jobs:
build:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v3
```
Now we need to know how to get actions/checkout, this configuration is the default git server to get it. That means we will get the repository via git clone ${DEFAULT_ACTIONS_URL}/actions/checkout and fetch tag v3.
To help people who don't want to mirror these actions in their git instances, the default value is https://codeberg.org
To help people run actions totally in their network, they can change the value and copy all necessary action repositories into their git server.
Of course we should support the form in future PRs like
```yaml
steps:
- uses: codeberg.org/actions/checkout@v3
```
although Github don't support this form.
- `ENABLED`: **false**: Enable/Disable actions
- `DEFAULT_ACTIONS_URL`: **https://code.forgejo.org**: Default address to get action plugins, e.g. the default value means downloading from "https://code.forgejo.org/actions/checkout" for "uses: actions/checkout@v3"
## Other (`other`)

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- [Email setup](email-setup)
- [Incoming Email](incoming-email)
- [Logging Configuration](logging-documentation)
- [Actions](actions)