Did someone manage to configure Windows host aggregate ? I tried same is in https://docs.openstack.org/nova/2024.2/reference/isolate-aggregates.html 1. Created 2 aggregates in 2 AZ , added 1 host to each 2. Set the scheduler.enable_isolated_aggregate_filtering config option to true in nova.conf and restart the nova-scheduler service cat /etc/kolla-pilot/config/nova.conf [libvirt] hw_machine_type=x86_64=q35 [scheduler] enable_isolated_aggregate_filtering = True 3. Add trait CUSTOM_LICENSED_WINDOWS to the resource providers for kvm01 and kvm03 in the Placement service.openstack resource provider list +--------------------------------------+-------+------------+--------------------------------------+----------------------+ | uuid | name | generation | root_provider_uuid | parent_provider_uuid | +--------------------------------------+-------+------------+--------------------------------------+----------------------+ | 36c0ae68-cc5f-4219-94bb-e46bcd3311d9 | kvm01 | 257 | 36c0ae68-cc5f-4219-94bb-e46bcd3311d9 | None | | 8abb4b5e-0407-405d-97d1-7a03a9a06cbe | kvm03 | 129 | 8abb4b5e-0407-405d-97d1-7a03a9a06cbe | None | | 14ed0962-d8ce-4bed-b90a-243b3a069f5d | kvm02 | 1096 | 14ed0962-d8ce-4bed-b90a-243b3a069f5d | None | | 8714da8e-7e9b-4823-93bb-df819c143e99 | kvm04 | 87 | 8714da8e-7e9b-4823-93bb-df819c143e99 | None | +--------------------------------------+-------+------------+--------------------------------------+----------------------+ openstack --os-placement-api-version 1.6 trait create CUSTOM_LICENSED_WINDOWStraits=$(openstack --os-placement-api-version 1.6 resource provider trait list -f value 36c0ae68-cc5f-4219-94bb-e46bcd3311d9 | sed 's/^/--trait /')openstack --os-placement-api-version 1.6 resource provider trait set $traits --trait CUSTOM_LICENSED_WINDOWS 36c0ae68-cc5f-4219-94bb-e46bcd3311d9traits=$(openstack --os-placement-api-version 1.6 resource provider trait list -f value 8abb4b5e-0407-405d-97d1-7a03a9a06cbe | sed 's/^/--trait /') openstack --os-placement-api-version 1.6 resource provider trait set $traits --trait CUSTOM_LICENSED_WINDOWS 8abb4b5e-0407-405d-97d1-7a03a9a06cbe openstack --os-compute-api-version 2.53 aggregate set --property trait:CUSTOM_LICENSED_WINDOWS=required WindowsW1 openstack --os-compute-api-version 2.53 aggregate set --property trait:CUSTOM_LICENSED_WINDOWS=required WindowsW2 Flavor metadata trait:CUSTOM_LICENSED_WINDOWS with value required nova.exception.NoValidHost: No valid host was found. There are not enough hosts available. Got no allocation candidates from the Placement API.