---
.. code-block:: yaml

    - name: Installation and setup of Nova
      hosts: nova_all
      user: root
      roles:
        - { role: "os_neutron", tags: [ "os-neutron" ] }
      vars:
        neutron_galera_address: "{{ internal_lb_vip_address }}"
        galera_root_user: root
      vars_prompt:
        - name: "galera_root_password"
          prompt: "What is galera_root_password?"