- name: Set the hostname
  hostname:
    name: "{{ inventory_hostname_short }}"
    use: debian
- name: Configure hosts file
  blockinfile:
    path: /etc/hosts
    marker_begin: '--- BEGIN VN ---'
    marker_end: '--- END VN ---'
    marker: "# {mark}"
    block: |
      {{ ansible_default_ipv4.address }} {{ ansible_host }} {{ inventory_hostname_short }}