## Forgejo runners

The LXC container in which the runner is installed must have capabilities that support the backend.

- docker:// needs a Docker enabled container
- lxc:// needs a Docker, LXC and libvirt enabled container

The runners it contains are not started at boot, it must be done manually. The bash history has the command line to do so.

### Installation

```shell
version=4.0.1
sudo wget -O /usr/local/bin/forgejo-runner-$version https://code.forgejo.org/forgejo/runner/releases/download/v$version/forgejo-runner-$version-linux-amd64
sudo chmod +x /usr/local/bin/forgejo-runner-$version
echo 'export TERM=xterm-256color' >> .bashrc
```

### Creating a runner

Multiple runners can co-exist on the same machine. To keep things
organized they are located in a directory that is the same as the URL
from which the token is obtained. For instance
DIR=codeberg.org/forgejo-integration means that the token was obtained from the
https://codeberg.org/forgejo-integration organization.

If a runner only provides unprivileged docker containers, the labels
in `config.yml` should be:
`labels: ['docker:docker://node:20-bookworm']`.

If a runner provides LXC containers and unprivileged docker
containers, the labels in `config.yml` should be
`labels: ['self-hosted:lxc://debian:bookworm', 'docker:docker://node:20-bookworm']`.

```shell
name=myrunner
mkdir -p $DIR ; cd $DIR
forgejo-runner-$version generate-config > config-$name.yml
## edit config-$name.yml and adjust the `labels:`
## Obtain a $TOKEN from https://$DIR
forgejo-runner-$version register --no-interactive --token $TOKEN --name runner --instance https://codeberg.org
forgejo-runner-$version --config config-$name.yml daemon |& cat -v > runner.log &
```

### Removing old docker images

[docuum](https://github.com/stepchowfun/docuum)

```sh
curl https://raw.githubusercontent.com/stepchowfun/docuum/main/install.sh -LSfs | sh
sudo tee /etc/systemd/system/docuum.service <<'EOF'
[Unit]
Description=Docuum
After=docker.service
Wants=docker.service

[Service]
Environment='THRESHOLD=10 GB'
ExecStart=/usr/local/bin/docuum --threshold ${THRESHOLD}
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF
sudo systemctl enable docuum --now
sudo journalctl --follow --unit docuum
```