Comment 7 for bug 1969971

we have verified that host in nova.conf is using already the FQDN.

Also the issue occurs only when resizing or migrating VMs after the original image was deleted.

The error only occurs when the resize or migration includes the copy of the base file from the original host at

/var/lib/nova/instances/_base

When the original image is deleted from glance, nova fall back to copy it from host:

https://github.com/openstack/nova/blob/stable/ussuri/nova/virt/libvirt/driver.py#L9452

and it uses instance.host as source, which is the FQDN of the compute node:

https://github.com/openstack/nova/blob/stable/ussuri/nova/virt/libvirt/driver.py#L9620

And charm is not configuring prompt-less ssh for the FQDN