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310 lines
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Markdown
310 lines
13 KiB
Markdown
---
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layout: '~/layouts/Markdown.astro'
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title: 'Forgejo Actions administrator guide'
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license: 'CC-BY-SA-4.0'
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---
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`Forgejo Actions` provides continuous integration driven from the files in the `.forgejo/workflows` directory of a repository. It is still in beta and disabled by default. It can be activated by adding the following to `app.ini`:
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```yaml
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[actions]
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ENABLED = true
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```
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`Forgejo` itself does not run the jobs, it relies on the [Forgejo runner](https://code.forgejo.org/forgejo/runner) to do so.
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# Default Actions URL
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When `uses:` does not specify an absolution URL for the `Action`, the
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value of `DEFAULT_ACTIONS_URL` is prepended to it.
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```yaml
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[actions]
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ENABLED = true
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DEFAULT_ACTIONS_URL = https://code.forgejo.org
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```
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The actions found at https://code.forgejo.org are:
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- known to work with Forgejo Actions
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- published under a Free Software license
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They can be found in the following organizations:
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- [General purpose actions](https://code.forgejo.org/actions)
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- [Docker actions](https://code.forgejo.org/docker)
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When setting `DEFAULT_ACTIONS_URL` to a Forgejo instance with an open
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registration, **care must be taken to avoid name conflicts**. For
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instance if an action has `uses: foo/bar@main` it will clone and try
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to run the action found at `DEFAULT_ACTIONS_URL/foo/bar` if it exists,
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even if it provides something different than what is expected.
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# Forgejo runner
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## Installation
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Download the latest [binary release](https://code.forgejo.org/forgejo/runner/releases) and verify their signature:
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```shell
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$ wget -O forgejo-runner https://code.forgejo.org/forgejo/runner/releases/download/v2.2.0/forgejo-runner-amd64
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$ chmod +x forgejo-runner
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$ wget -O forgejo-runner.asc https://code.forgejo.org/forgejo/runner/releases/download/v2.2.0/forgejo-runner-amd64.asc
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$ gpg --keyserver keys.openpgp.org --recv EB114F5E6C0DC2BCDD183550A4B61A2DC5923710
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$ gpg --verify forgejo-runner.asc forgejo-runner
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Good signature from "Forgejo <contact@forgejo.org>"
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aka "Forgejo Releases <release@forgejo.org>"
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```
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### Docker
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For jobs to run in containers, the `Forgejo runner` needs access to [Docker](https://docs.docker.com/engine/install/).
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### LXC
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For jobs to run in LXC containers, the `Forgejo runner` needs passwordless sudo access for all `lxc-*` commands 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:
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```shell
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$ git clone https://code.forgejo.org/forgejo/lxc-helpers
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$ sudo cp -a lxc-helpers/lxc-helpers{,-lib}.sh /usr/local/bin
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$ lxc-helpers.sh lxc_container_create myrunner
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$ lxc-helpers.sh lxc_container_start myrunner
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$ lxc-helpers.sh lxc_container_user_install forgejo-runners 1000 debian
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```
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> **NOTE:** Multiarch [Go](https://go.dev/) builds and [binfmt](https://github.com/tonistiigi/binfmt) need `bookworm` to produce and test binaries on a single machine for people who do not have access to dedicated hardware. If this is not needed, installing the `Forgejo runner` on `bullseye` will also work.
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The `Forgejo runner` can then be installed and run within the `myrunner` container.
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```shell
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$ lxc-helpers.sh lxc_container_run forgejo-runners -- sudo --user debian bash
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$ sudo apt-get install docker.io wget gnupg2
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$ wget -O forgejo-runner https://code.forgejo.org/forgejo/runner/releases/download/v2.2.0/forgejo-runner-amd64
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...
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```
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> **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.
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## Registration
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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:
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- in `/admin/runners` to gain access to all repositories.
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- in `/org/{org}/settings/actions/runners` to gain access to all repositories within the organization.
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- in `/user/settings/actions/runners` to gain access to all repositories of the logged in user
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- in `/{owner}/{repository}/settings/actions/runners` to gain access to a single repository.
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For instance, using a token obtained for a test repository from `next.forgejo.org`:
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```shell
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forgejo-runner register --no-interactive --token {TOKEN} --name runner --instance https://next.forgejo.org --labels docker:docker://node:16-bullseye,self-hosted
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INFO Registering runner, arch=amd64, os=linux, version=2.2.0.
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INFO Runner registered successfully.
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```
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It will create a `.runner` file that looks like:
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```json
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{
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"WARNING": "This file is automatically generated. Do not edit.",
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"id": 6,
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"uuid": "fcd0095a-291c-420c-9de7-965e2ebaa3e8",
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"name": "runner",
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"token": "{TOKEN}",
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"address": "https://next.forgejo.org",
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"labels": ["docker:docker://node:16-bullseye", "self-hosted"]
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}
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```
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## Configuration
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The default configuration for the runner can be
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displayed with `forgejo-runner generate-config`, stored in a
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`config.yml` file, modified and used instead of the default with the
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`--config` flag.
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```yaml
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$ forgejo-runner generate-config > config.yml
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# Example configuration file, it's safe to copy this as the default config file without any modification.
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log:
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# The level of logging, can be trace, debug, info, warn, error, fatal
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level: info
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runner:
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# Where to store the registration result.
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file: .runner
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# Execute how many tasks concurrently at the same time.
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capacity: 1
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# Extra environment variables to run jobs.
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envs:
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A_TEST_ENV_NAME_1: a_test_env_value_1
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A_TEST_ENV_NAME_2: a_test_env_value_2
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# Extra environment variables to run jobs from a file.
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# It will be ignored if it's empty or the file doesn't exist.
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env_file: .env
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# The timeout for a job to be finished.
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# Please note that the Forgejo instance also has a timeout (3h by default) for the job.
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# So the job could be stopped by the Forgejo instance if it's timeout is shorter than this.
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timeout: 3h
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# Whether skip verifying the TLS certificate of the Forgejo instance.
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insecure: false
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# The timeout for fetching the job from the Forgejo instance.
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fetch_timeout: 5s
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# The interval for fetching the job from the Forgejo instance.
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fetch_interval: 2s
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# The labels of a runner are used to determine which jobs the runner can run, and how to run them.
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# Like: ["macos-arm64:host", "ubuntu-latest:docker://node:16-bullseye", "ubuntu-22.04:docker://node:16-bullseye"]
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# If it's empty when registering, it will ask for inputting labels.
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# If it's empty when execute `deamon`, will use labels in `.runner` file.
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labels: []
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cache:
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# Enable cache server to use actions/cache.
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enabled: true
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# The directory to store the cache data.
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# If it's empty, the cache data will be stored in $HOME/.cache/actcache.
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dir: ""
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# The host of the cache server.
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# It's not for the address to listen, but the address to connect from job containers.
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# So 0.0.0.0 is a bad choice, leave it empty to detect automatically.
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host: ""
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# The port of the cache server.
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# 0 means to use a random available port.
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port: 0
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container:
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# Specifies the network to which the container will connect.
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# Could be host, bridge or the name of a custom network.
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# If it's empty, create a network automatically.
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network: ""
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# Whether to use privileged mode or not when launching task containers (privileged mode is required for Docker-in-Docker).
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privileged: false
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# And other options to be used when the container is started (eg, --add-host=my.forgejo.url:host-gateway).
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options:
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# The parent directory of a job's working directory.
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# If it's empty, /workspace will be used.
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workdir_parent:
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# Volumes (including bind mounts) can be mounted to containers. Glob syntax is supported, see https://github.com/gobwas/glob
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# You can specify multiple volumes. If the sequence is empty, no volumes can be mounted.
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# For example, if you only allow containers to mount the `data` volume and all the json files in `/src`, you should change the config to:
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# valid_volumes:
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# - data
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# - /src/*.json
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# If you want to allow any volume, please use the following configuration:
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# valid_volumes:
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# - '**'
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valid_volumes: []
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# overrides the docker client host with the specified one.
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# If it's empty, act_runner will find an available docker host automatically.
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# If it's "-", act_runner will find an available docker host automatically, but the docker host won't be mounted to the job containers and service containers.
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# If it's not empty or "-", the specified docker host will be used. An error will be returned if it doesn't work.
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docker_host: ""
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host:
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# The parent directory of a job's working directory.
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# If it's empty, $HOME/.cache/act/ will be used.
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workdir_parent:
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```
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## Cache configuration
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Some actions such as https://code.forgejo.org/actions/cache or
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https://code.forgejo.org/actions/setup-go can communicate with the
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`Forgejo runner` to save and restore commonly used files such as
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compilation dependencies. They are stored as compressed tar archives,
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fetched when a job starts and saved when it completes.
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If the machine has a fast disk, uploading the cache when the job
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starts may significantly reduce the bandwidth required to download
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and rebuild dependencies.
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If the machine on which the `Forgejo runner` is running has a slow
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disk and plenty of CPU and bandwidth, it may be better to not activate
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the cache as it can slow down the execution time.
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## Running the daemon
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Once the `Forgejo runner` is successfully registered, it can be run from the directory in which the `.runner` file is found with:
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```shell
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$ forgejo-runner daemon
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INFO[0000] Starting runner daemon
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```
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To verify it is actually available for the targeted repository, go to `/{owner}/{repository}/settings/actions/runners`. It will show the runners:
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- dedicated to the repository with the **repo** type
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- available to all repositories within an organization or a user
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- available to all repositories, with the **Global** type
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Adding the `.forgejo/workflows/demo.yaml` file to the test repository:
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```yaml
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on: [push]
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jobs:
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test:
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runs-on: docker
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steps:
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- run: echo All Good
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```
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Will send a job request to the `Forgejo runner` that will display logs such as:
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```shell
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...
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INFO[2023-05-28T18:54:53+02:00] task 29 repo is earl-warren/test https://code.forgejo.org https://next.forgejo.org
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...
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[/test] [DEBUG] Working directory '/workspace/earl-warren/test'
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| All Good
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[/test] ✅ Success - Main echo All Good
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```
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It will also show a similar output in the `Actions` tab of the repository.
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If no `Forgejo runner` is available, `Forgejo` will wait for one to connect and submit the job as soon as it is available.
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## Labels and `runs-on`
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The workflows / tasks defined in the files found in `.forgejo/workflows` must specify the environment they need to run with `runs-on`. Each `Forgejo runner` declares with **labels** which one they support so `Forgejo` knows sends them tasks accordingly. For instance if a job within a workflow has:
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```yaml
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runs-on: docker
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```
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it will be submitted to a runner that registered with a `docker` label (for instance with `--labels docker:docker://node:16-bullseye`).
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### Docker
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If `runs-on` is matched to a label that contains `docker://`, the rest of it is interpreted as the default container image to use if no other is specified. The runner will execute all the steps, as root, within a container created from that image.
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### LXC
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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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## Host environment
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Certain hosts may require specific configurations for runners to work smoothly. Anything specific to these host environments can be found below.
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### NixOS
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The `gitea-actions-runner` recipe was released in NixOS 23.05. It can be configured via `services.gitea-actions-runner`.
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Please note that the `services.gitea-actions-runner.instances.<name>.labels` key may be set to `[]` (an empty list) to use the packaged Forgejo instance list. One of `virtualisation.docker.enable` or `virtualisation.podman.enable` will need to be set. The default Forgejo image list is populated with docker images.
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#### IPv6 on docker
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IPv6 support is not enabled by default in docker. The following snippet enables this.
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```nix
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virtualisation.docker = {
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daemon.settings = {
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fixed-cidr-v6 = "fd00::/80";
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ipv6 = true;
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};
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};
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```
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