Open Stack

Hi Cyborg Team!
Karl from Helm Team.

When creating a VM with the correct flavor, the mdev gets created by cyborg agent and I can see it in the nodedev-list --cap mdev.
However Nova then fails with:
nova.virt.libvirt.driver [<removed>- - default default] Searching for available mdevs... _get_existing_mdevs_not_assigned /var/lib/openstack/lib/python3.10/site-packages/nova/virt/libvirt/driver.py
:8357
2023-09-21 14:34:47.808 1901814 INFO nova.virt.libvirt.driver [<removed> - - default default] Available mdevs at: set().
2023-09-21 14:34:47.809 1901814 DEBUG nova.virt.libvirt.driver [<removed> - - default default] No available mdevs where found. Creating an new one... _allocate_mdevs /var/lib/openstack/lib/python3.10/site-packages/nova/virt/libvirt/driv
er.py:8496
2023-09-21 14:34:47.809 1901814 DEBUG nova.virt.libvirt.driver [<removed> - - default default] Attempting to create new mdev... _create_new_mediated_device /var/lib/openstack/lib/python3.10/site-packages/nova/virt/libvirt/driver.py:8385
2023-09-21 14:34:48.455 1901814 INFO nova.virt.libvirt.driver [<removed> - - default default] Failed to create mdev. No free space found among the following devices: ['pci_0000_4b_03_1', … <truncated list>].
2023-09-21 14:34:48.456 1901814 ERROR nova.compute.manager [<removed> - - default default] [instance: 2026e2a2-b17a-43ab-adcb-62a907f58b51] Instance failed to spawn: nova.exception.ComputeResourcesUnavailable: Insufficient compute resources: mdev-capable resource is not available.

Once this happened, ARQ removes the mdev and cleans up.

I’ve got Cyborg 2023.2 running and have a device profile like so:
karl at Karls-Air ~ % openstack accelerator device profile show e2b07e11-fe69-4f33-83fc-0f9e38adb7ae
+-------------+---------------------------------------------------------------------------+
| Field       | Value                                                                     |
+-------------+---------------------------------------------------------------------------+
| created_at  | 2023-09-21 13:30:05+00:00                                                 |
| updated_at  | None                                                                      |
| uuid        | e2b07e11-fe69-4f33-83fc-0f9e38adb7ae                                      |
| name        | VGPU_A40-Q48                                                              |
| groups      | [{'resources:VGPU': '1', 'trait:CUSTOM_NVIDIA_2235_A40_48Q': 'required'}] |
| description | None                                                                      |
+-------------+---------------------------------------------------------------------------+
karl at Karls-Air ~ %

I can see the allocation candidate:
karl at Karls-Air ~ % openstack allocation candidate list --resource VGPU=1 | grep A40
|  41 | VGPU=1     | 229bf15f-5689-3d2c-b37b-5c8439ea6a71 | VGPU=0/1                | OWNER_CYBORG,CUSTOM_NVIDIA_2235_A40_48Q |
karl at Karls-Air ~ %


Am I missing something critical here? Because I cannot seem to figure this out… have I got a PCI address wrong, or something?

Any help from the Cyborg or Nova teams would be fantastic.

Thanks,
Karl.

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