register-runner.yml

---
- name: List configured runners
  command: gitlab-runner list
  register: configured_runners
  changed_when: false

- name: Register multiple runner to GitLab
  command: >
    gitlab-runner register
    --non-interactive
    --url '{{ item.coordinator_url | d("https://your.gitlab.installation/ci") }}'
    --registration-token '{{ item.registration_token }}'
    --description '{{ item.description }}'
    --limit '{{ item.limit | d("0") }}'
    --tag-list '{{ item.tags | d([]) | join(",") }}'
    --executor '{{ item.executor | d("shell") }}'
    --run-untagged={{ item.run_untagged |  d("true") }}
    --locked={{ item.locked | d("false") }}
    --request-concurrency 1
    --output-limit '{{ item.output_limit | d(4096) }}'
    {% if item.executor == 'docker' %}
    --docker-image "{{ item.docker_image }}"
    --docker-tlsverify='{{ item.docker_tlsverify | d("false") }}'
    --docker-pull-policy '{{ item.docker_pull_policy | d("always") }}'
    --docker-privileged '{{ item.docker_privileged | d("true") }}'
    --docker-volumes [ "{{ item.docker_volumes | d([]) | join('", "') }}" ]
    {% endif %}
  when: configured_runners.stderr is not defined or configured_runners.stderr.find('\n%s ' % item.description) == -1
  with_items: "{{ gitlab_runner_list }}"