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Re:Ruby Bug: SecureRandom should try /dev/urandom first by viraptor on Wednesday May 04, 2016 @02:23AM (#11626583)
It's configurable. You can even forward host's /dev/urandom as guest's /dev/random.
Re:Ruby Bug: SecureRandom should try /dev/urandom first by matt_wulfeck on Wednesday May 04, 2016 @11:55AM (#11629218)
Actually it's not supported with virtio-rng. Here[0] is a proposed patch to add support.

[0] http://www.redhat.com/archives/libvir-list/2016-March/msg010...

Re:Ruby Bug: SecureRandom should try /dev/urandom first by viraptor on Wednesday May 04, 2016 @07:58PM (#11632946)
I knew you can change the source (it accepts egd after all), but didn't know they actually prevent you from choosing urandom. This is sad :(