Hello. I am reading about Kolla Ansible Inventory https://docs.openstack.org/kolla-ansible/latest/user/multinode.html In my environment, Controllers and Compute01>>>03 have same network interfaces But from compute04>>06 have different interface neutron_external_interface=*eth0.1 *api_interface=*eth0.2 *tunnel_interface= *eth0.3* Which is the best group for my case? [compute-custom] compute04 neutron_external_interface=*eth0.1 *api_interface=*eth0.2 * tunnel_interface=*eth0.3* compute05 neutron_external_interface=*eth0.1 *api_interface=*eth0.2 * tunnel_interface=*eth0.3* compute06 neutron_external_interface=*eth0.1 *api_interface=*eth0.2 * tunnel_interface=*eth0.3* Then put them to same block services which have Nova? I see the we prefer to use host_vars or*group_vars. *Do we have some examples about it? Thank you. Nguyen Huu Khoi