---
  - name: "Set hostnames for systems based on variables"
    hosts: all
    gather_facts: True
    become: true

    tasks:

      - name: Show facts gathered-- inventory_hostname
        debug:
          msg: "inventory_hostname is {{ inventory_hostname }}"

######################################## RH-Like Distros ############################################################
      - name: Set hostnames using redhat method if distro is RH-like and major version below 7
        hostname:
          name: "{{ inventory_hostname }}"
          use: redhat
        when:
         - ansible_facts['ansible_os_family'] == 'RedHat'
         - ansible_facts['distribution_major_version'] <= '7'
        ignore_errors: yes

      - name: Set hostnames using systemd if distro is RH-like and major version is 7 or higher
        hostname:
          name: "{{ inventory_hostname }}"
          use: systemd
        when:
          - ansible_facts['ansible_os_family'] == 'RedHat'
          - ansible_facts['distribution_major_version'] >= '7'
        ignore_errors: yes

######################################## Deb-like Distros #############################################################
      - name: Set hostnames using debian method if distro is Deb-like
        hostname:
          name: "{{ inventory_hostname }}"
          use: debian
        when:
          - ansible_facts['ansible_os_family'] == 'Debian'
        ignore_errors: yes