Tim, Looking at Nova sources [1] and libvirt documentation [2]. The default value of rng_dev_path None means libvirt will use /dev/random thanks, dims [1] https://github.com/openstack/nova/blob/master/nova/virt/libvirt/driver.py#L3767 [2] https://libvirt.org/formatdomain.html#elementsRng On Mon, Apr 20, 2015 at 11:45 AM, Tim Bell <Tim.Bell at cern.ch> wrote: > According to the nova.conf documentation, there is a parameter for the > rng_dev_path for the source of the /dev/random on guests which are > appropriately enabled. > > > > The help in the documentation at that the default value is <None> and the > permitted options are /dev/random or /dev/hwrng. > > > > If these are the permitted values, what is the impact of the default setting > “<None>” which is not in the list ? > > > > What path would be used for the entropy if the default is used ? > > > > From nova.conf, > > > > # A path to a device that will be used as source of entropy on > > # the host. Permitted options are: /dev/random or /dev/hwrng > > # (string value) > > #rng_dev_path=<None> > > > > Tim > > > _______________________________________________ > Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : openstack at lists.openstack.org > Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > -- Davanum Srinivas :: https://twitter.com/dims