Entropy generator in Juju environment?

Nick Barcet nick.barcet at canonical.com
Thu Dec 22 13:47:00 UTC 2011


Hello,

As I was writing a charm that needed to use ssh-keygen, the problem of
randomness and entropy in virtual environments came up.  This made me
wonder if the Juju environment server would not be a great place to
solve this recurring issue.

Taking as an hypothesis that the events taking place on the juju
environment servers depends on enough factor (network speed, machine
speed and loads, etc), why not continuously use these "time between
events" as seeds to provide a good source of entropy for all machines in
the environment? "Time between events" could measure the time it took
between requests and ack from the juju agent, or other things of this sort.

Any pro's, con's or other ideas on how to solve this in a simpler way?

Nick


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