matrix-docker-ansible-deploy/roles/custom/matrix-appservice-draupnir-for-all/tasks/validate_config.yml

---

- name: Fail if required matrix-bot-draupnir variables are undefined
  ansible.builtin.fail:
    msg: "The `{{ item }}` variable must be defined and have a non-null value."
  with_items:
    - "matrix_appservice_draupnir_for_all_master_control_room_alias"
    - "matrix_bot_draupnir_container_network"
  when: "vars[item] == '' or vars[item] is none"