From: Marco Vedovati [mailto:mvedovati@suse.com]
[snip]
In my view, given the ephemeral aspect of containers, /dev/urandom should be fine most of the time. As an option, user should be left the possibility to select /dev/random if that is needed for his specific application.
From a read around, I agree with the sentiment, that /dev/urandom is . I'm not sure how that ties in with QEMU/KVM though - if we direct QEMU to use the host /dev/urandom, does that mean that the guest /dev/random is really using the host /dev/urandom - so any strong /dev/random guarantees inside the guest are now a lie... I don't know how the virtio rng and qemu hang together etc.
BTW, it may be worth investigating on what is the state of the art solution chosen in virtualization systems with a high VM count.
+1 I doubt we are the first people to run into this scenario.
Marco
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