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runner/examples/vm/rootless-docker.md

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Using Rootless Docker withact_runner

Here is a simple example of how to set up act_runner with rootless Docker. It has been created with Debian, but other Linux should work the same way.

Note: This procedure needs a real login shell -- using sudo su or other method of accessing the account will fail some of the steps below.

As root:

  • Create a user to run both docker and act_runner. In this example, we use a non-privileged account called rootless.
 useradd -m rootless
 passwd rootless

  • Install docker-ce

  • (Recommended) Disable the system-wide Docker daemon

    systemctl disable --now docker.service docker.socket

As the rootless user:

 export XDG_RUNTIME_DIR=/home/rootless/.docker/run
 export PATH=/home/rootless/bin:$PATH
 export DOCKER_HOST=unix:///run/user/1001/docker.sock
  • Reboot. Ensure that the Docker process is working.
  • Create a directory for saving act_runner data between restarts

mkdir /home/rootless/act_runner

  • Register the runner from the data directory
 cd /home/rootless/act_runner
 act_runner register
  • Generate a act_runner configuration file in the data directory. Edit the file to adjust for the system.
 act_runner generate-config >/home/rootless/act_runner/config
  • Create a new user-levelsystemd unit file as /home/rootless/.config/systemd/user/act_runner.service with the following contents:
 Description=Gitea Actions runner
 Documentation=https://gitea.com/gitea/act_runner
 After=docker.service

 [Service]
 Environment=PATH=/home/rootless/bin:/sbin:/usr/sbin:/home/rootless/bin:/home/rootless/bin:/home/rootless/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
 Environment=DOCKER_HOST=unix:///run/user/1001/docker.sock
 ExecStart=/usr/bin/act_runner daemon -c /home/rootless/act_runner/config
 ExecReload=/bin/kill -s HUP $MAINPID
 WorkingDirectory=/home/rootless/act_runner
 TimeoutSec=0
 RestartSec=2
 Restart=always
 StartLimitBurst=3
 StartLimitInterval=60s
 LimitNOFILE=infinity
 LimitNPROC=infinity
 LimitCORE=infinity
 TasksMax=infinity
 Delegate=yes
 Type=notify
 NotifyAccess=all
 KillMode=mixed

 [Install]
 WantedBy=default.target
  • Reboot

After the system restarts, check that theact_runner is working and that the runner is connected to Gitea.

 systemctl --user status act_runner
 journalctl --user -xeu act_runner