--- parameter_defaults: HostnameMap: overcloud-controller-0: "{{ controller_0_hostname }}" {% if not multi_cell | default(False) | bool %} overcloud-controller-1: "{{ controller_1_hostname }}" overcloud-controller-2: "{{ controller_2_hostname }}" overcloud-novacompute-0: "{{ compute_0_hostname }}" overcloud-novacompute-1: "{{ compute_1_hostname }}" overcloud-novacompute-2: "{{ compute_2_hostname }}" {% else %} cell1-controller-0: "{{ compute_0_hostname }}" cell1-compute-0: "{{ compute_1_hostname }}" cell2-controller-compute-0: "{{ compute_2_hostname }}" {% endif %}