- hosts: localhost
  gather_facts: no
  tasks:

  - name: Verify correct usage of parameter
    assert:
      that:
        - nombre is defined
        - nombre|length > 3
      fail_msg: 'Debe definir una variable "nombre"'

- hosts: localhost
  gather_facts: yes
  user: sistemas
  roles:
    - lxchost
  vars:
    dominio: agofer.net