---
dns:
  hosts:
    dns_1:
      ansible_host: 192.168.1.3
      sync_target: 192.168.1.4
    dns_2:
      ansible_host: 192.168.1.4
      sync_target: 192.168.1.3
proxy:
  hosts:
    proxy_1:
      ansible_host: 192.168.1.12