[ {version, 1}, {nodes, [ {% for host in groups[role_rabbitmq_groups] %} {'rabbit@{{ hostvars[host]['ansible_hostname'] }}', disc} {%- if not loop.last -%},{%- endif %} {% endfor %} ]}, {gospel, {node, 'rabbit@{{ hostvars[groups[role_rabbitmq_groups][0]]['ansible_hostname'] }}'}} ].