- For the libvirt driver, by default hardware properties will be retrieved
from the Glance image and if such haven't been provided, it will use
a libosinfo database to get those values. If users want to force a specific
guest OS ID for the image, they can now use a new glance image property
``os_distro`` (eg. ``--property os_distro=fedora21``). In order to use
the libosinfo database, you need to separately install the related native
package provided for your operating system distribution.