Comment 2 for bug 1687459

From quickstart guide: https://docs.openstack.org/project-deploy-guide/kolla-ansible/ocata/quickstart.html

Libvirt is started by default on many operating systems. Please disable libvirt on any machines that will be deployment targets. Only one copy of libvirt may be running at a time.

service libvirt-bin stop
update-rc.d libvirt-bin disable

On Ubuntu, apparmor will sometimes prevent libvirt from working.

/usr/sbin/libvirtd: error while loading shared libraries:
libvirt-admin.so.0: cannot open shared object file: Permission denied

If you are seeing the libvirt container fail with the error above, disable the libvirt profile.

sudo apparmor_parser -R /etc/apparmor.d/usr.sbin.libvirtd