What is the value of the "virt_type" config option in nova.conf on the compute? That defaults to 'kvm' for the libvirt driver, but if you're using xen with the libvirt driver then virt_type=xen in nova.conf in the [libvirt] group.
What is the value of the "virt_type" config option in nova.conf on the compute? That defaults to 'kvm' for the libvirt driver, but if you're using xen with the libvirt driver then virt_type=xen in nova.conf in the [libvirt] group.