---
- name: Stop playbook if system is not Debian
  ansible.builtin.fail:
    msg: "This role only supports Debian."
  when: ansible_facts['os_family'] != "Debian"

- name: Ensure Zabbix passive servers are defined
  ansible.builtin.assert:
    that:
      - monitoring_zabbix_passive_servers | length > 0
    fail_msg: "Set monitoring_zabbix_passive_servers to the IPs, CIDRs or DNS names allowed to query the agent."