01-check-compatibility.yaml

- name: Pre-flight checklist before starting
  hosts: all
  tasks:
    - name: Check if distribution is supported
      fail: 
        msg: Your distribution is actually unsupported
      when:
        - ansible_distribution != 'CentOS'
        - ansible_distribution_major_version < '8'
      
    - name: define traditional ethernet facts
      set_fact:
        ansible_eth: "{% set ansible_eth = ansible_eth|default([]) + [hostvars[inventory_hostname]['ansible_' + item]] %}{{ ansible_eth|list }}"
      when: hostvars[inventory_hostname]['ansible_' + item]['type'] == 'ether'
      with_items:
        - "{{ ansible_interfaces }}"

    - name: Check if traditional ethernets are two or more
      fail: 
        msg: Your servers should have at least two ethernets
      when:
        - ansible_eth | count < 2