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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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