[PVE-User] Debian buster inside PVE KVM

Thomas Lamprecht t.lamprecht at proxmox.com
Mon Jul 8 09:10:48 CEST 2019


Am 7/8/19 um 8:05 AM schrieb Fabian Grünbichler:
> On Mon, Jul 08, 2019 at 02:16:34AM +0200, Chris Hofstaedtler | Deduktiva wrote:
>> Hello,
>>
>> while doing some test upgrades I ran into the buster RNG problem [1],
>> where the newer kernel and systemd use a lot more randomness during
>> boot, causing startup delays.
>>
>> Very clearly noticable in dmesg:
>> [    1.500056] random: fast init done
>> [  191.700840] random: crng init done
>> [  191.701445] random: 7 urandom warning(s) missed due to ratelimiting
>>
>> I couldn't find a supported way of enabling virtio_rng [2] in PVE
>> 5.4 or the 6.0 beta. As a test, I've set "args: -device
>> virtio-rng-pci" and that appears to work - the VM auto-loads the
>> virtio_rng kmod and "crng init done" happens at ~4s after poweron.
> 
> yes, that's the way to go for now.
> 
>> Are there any recommendations at this time or plans for adding
>> virtio_rng?
> 
> filed [1] to keep track of adding proper support, as it sounds like a
> simple enough but worthwhile feature to me :)
> 
> 1: https://bugzilla.proxmox.com/show_bug.cgi?id=2264
> 

The request for this is a bit older, and then some concerns about
possible depleting the hosts entropy pool were raised.
Maybe we want to ship havedged, or at least recommend it in docs if no
other "high" bandwitdh (relatively speaking) HW rng source is
available on the host... ATM, I cannot find the discussion, sorry,
IIRC it was on a mailing list of ours..




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