docker-compose.yml

version: '3'
services:
  gitlab-runner:
    image: gitlab/gitlab-runner:alpine
    container_name: gitlab-runner
    restart: unless-stopped
    environment:
      - PROJECT_REGISTRATION_TOKEN="REPLACE_ME"
      - EXECUTOR="Docker"
      - DOCKER_IMAGE="alpine"
      - DESCRIPTION="docker-runner"
      - TAG_LIST="docker, linux"
      - RUN_UNTAGGED="true"
      - LOCKED="false"
      - ACCESS_LEVEL="not_protected"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    command: register \
      --non-interactive \
      --url "https://gitlab.com/" \
      --registration-token "$PROJECT_REGISTRATION_TOKEN" \
      --executor "$EXECUTOR" \
      --docker-image "$DOCKER_IMAGE" \
      --description "$DESCRIPTION" \
      --tag-list "$TAG_LIST" \
      --run-untagged "$RUN_UNTAGGED" \
      --locked "$LOCKED" \
      --access-level "$ACCESS_LEVEL"