infra/compose/forgejo.runner.yml

# SAMPLE ENV
# SHARED_SECRET=super-secret-string
# ROOT_PASSWORD=super-secret-password

volumes:
  docker_certs:

services:
  docker-in-docker:
    image: docker:dind
    hostname: docker
    privileged: true
    environment:
      DOCKER_TLS_CERTDIR: /certs
      DOCKER_HOST: docker-in-docker
    volumes:
      - docker_certs:/certs

  runner-register:
    image: code.forgejo.org/forgejo/runner:3.4.1
    links:
      - docker-in-docker
    environment:
      DOCKER_HOST: tcp://docker-in-docker:2376
      SHARED_SECRET: $SHARED_SECRET
    volumes:
      - /srv/runner-data:/data
    user: 0:0
    command: >-
      bash -ec '
      while : ; do
        forgejo-runner create-runner-file --connect --instance http://codeberg.org --name runner --secret ${SHARED_SECRET} && break ;
        sleep 1 ;
      done ;
      sed -i -e "s|\"labels\": null|\"labels\": [\"docker:docker://node:20-bookworm\", \"ubuntu-22.04:docker://catthehacker/ubuntu:act-22.04\"]|" .runner ;
      forgejo-runner generate-config > config.yml ;
      sed -i -e "s|network: .*|network: host|" config.yml ;
      sed -i -e "s|^  envs:$$|  envs:\n    DOCKER_HOST: tcp://docker:2376\n    DOCKER_TLS_VERIFY: 1\n    DOCKER_CERT_PATH: /certs/client|" config.yml ;
      sed -i -e "s|^  options:|  options: -v /certs/client:/certs/client|" config.yml ;
      sed -i -e "s|  valid_volumes: \[\]$$|  valid_volumes:\n    - /certs/client|" config.yml ;
      chown -R 1000:1000 /data
      '

  runner-daemon:
    image: code.forgejo.org/forgejo/runner:3.4.1
    links:
      - docker-in-docker
    environment:
      DOCKER_HOST: tcp://docker:2376
      DOCKER_CERT_PATH: /certs/client
      DOCKER_TLS_VERIFY: "1"
    volumes:
      - /srv/runner-data:/data
      - docker_certs:/certs
    command: >-
      bash -c '
      while : ; do test -w .runner && forgejo-runner --config config.yml daemon ; sleep 1 ; done
      '