I'm coming back to you all to help me with a new problem that I've never had before. I want to show students how to install Openstack with Kolla-ansible. They will each have a computer (DELL Precison 3660 Tower, 32G RAM, 500G SDD). Ubuntu is the system, version 22.04. I want to start with an "all-in-one" installation. So I test my-self first… I follow these procedure https://docs.openstack.org/kolla-ansible/latest/user/quickstart.html . everything works with the parameters I choose for my configuration, until the following problem: ___________________________________________________ ___________________________________________________ TASK [nova-cell : Ensuring config directories exist] ************************************************ ok: [localhost] TASK [nova-cell : Copying over config.json files for nova-cell-bootstrap] *************************** ok: [localhost] TASK [nova-cell : Copying over nova.conf for nova-cell-bootstrap] *********************************** ok: [localhost] TASK [nova-cell : Running Nova cell bootstrap container] ******************************************** ok: [localhost] TASK [nova-cell : Get a list of existing cells] ***************************************************** ok: [localhost] TASK [nova-cell : Extract current cell settings from list] ****************************************** fatal: [localhost]: FAILED! => {"msg": "template error while templating string: Could not load \"extract_cell\": 'extract_cell'. String: {{ existing_cells_list | extract_cell(nova_cell_name) }}. Could not load \"extract_cell\": 'extract_cell'"} NO MORE HOSTS LEFT ********************************************************************************** PLAY RECAP ****************************************************************************************** localhost : ok=146 changed=8 unreachable=0 failed=1 skipped=64 rescued=0 ignored=0 ___________________________________________________ ___________________________________________________ My globals.yml ___________________________________________________ ___________________________________________________ kolla_base_distro = "ubuntu" kolla_internal_vip_address: "172.16.60.15" network_interface : "enp0s31f6" neutron_external_interface: "enp3s0" neutron_plugin_agent: "openvswitch" enable_haproxy: "no" enable_cells: "no" nova_compute_virt_type: « kvm" …. ___________________________________________________ ___________________________________________________ What can be the problem ? Where can this come from ? I think the CPU is OK for virtualization. I have no idea, I don't know where this error could come from. Do you have an idea? Thanks in advance Franck