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.b...@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
>
>
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-- 
Davanum Srinivas :: https://twitter.com/dims

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