ansible-edda/playbooks/roles/services/deploy/rproxy/vars/nginx.yml

---
services_rproxy_nginx_add_hosts: "\
  {% set add_host_list = [] %}\
  {% for service in ( services_all_services | dict2items ) %}\
  {{ add_host_list.append('--add-host=pod-' ~ service.key ~ ':' ~ service.value.address) }}\
  {% endfor %}\
  {{ add_host_list | join(' ') }}"