nfs_cluster_list: "{% for server in groups['all']%} {% if hostvars[server]['ansible_default_ipv4']['address'] is defined %} {{hostvars[server]['ansible_' + hostvars[server]['nfs_iface']|default('')].ipv4.address|default(hostvars[server]['ansible_default_ipv4']['address'],true)}}{{ nfs_options }} {% endif %} {%endfor%}"