ansible_role_hosts/tasks/main.yml

---
- name: Add name/IP to hosts file
  lineinfile:
    dest: /etc/hosts
    regexp: '^{{ ansible_default_ipv4.address }}.*{{ ansible_hostname }}\.ansible\.kurs.*{{ ansible_hostname }}'
    line: '{{ ansible_default_ipv4.address }} {{ ansible_hostname }}.ansible.kurs {{ ansible_hostname }}'
    backup: yes

- name: Clean/remove 127.0.1.1
  lineinfile:
    dest: /etc/hosts
    regexp: '127.0.1.1.*{{ ansible_hostname }}'
    state: absent
    backup: yes

- name: Clean/remove 127.0.0.1 ... Hostname
  lineinfile:
    dest: /etc/hosts
    regexp: '127.0.0.1.*{{ ansible_hostname }}'
    state: absent
    backup: yes

- name: Ensure 127.0.0.1 localhost
  lineinfile:
    dest: /etc/hosts
    regexp: '127.0.0.1.*localhost'
    line: '127.0.0.1 localhost localhost.localdomain   # from Ansible'
    insertbefore: BOF
    backup: yes