We’re setting up 4 new compute nodes in our openstack Pike setup and 2 of them are behaving strangely, despite having the same hardware as the others. When I try to create a new instance on these compute nodes, the instance fail to spawn and the following error message appears in the log :

2019-05-24 15:13:35.559 16944 ERROR nova.compute.manager UnsupportedHardware: Requested hardware 'virtio1.0-net' is not supported by the 'kvm' virt driver 

After doing some research on google, I understand that this happens when the network interface model is defined as virtio1.0-net in the xml that’s fed to libvirt and libvirt does not consider that a valid name for a network interface model.

That said, why is Nova passing that model name to libvirt? I understand that it comes from libosinfo, but how is Nova getting that (wrong) information? If I look on other compute nodes, the model for the network interface is simply virtio.

Best regards,