/etc/nova/nova-compute.conf is in nova-compute-lxc 2:17.0.1-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | [DEFAULT]
compute_driver=libvirt.LibvirtDriver
[libvirt]
virt_type=lxc
|