Bug#931644: Buster kernel entropy pool too low on VM boot
Package: linux-image-4.19.0-5-amd64
Version: 4.19.0-5
Issue:
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After upgrading to Debian Buster, Xen PV guests' entropy pool is too
low to start cryptographic services in a timely manner. This results in
30+ second delays in the startup of services such as SSH. If I connect
to the VM's virtual VNC console and move the mouse during boot, the
system very rapidly collects entropy and crypto-dependent services like
SSH start with no delay.
The symptoms are identical to a bug I reported for Debian 9 (bug
#897917).
Workaround:
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Install `haveged`. If another RNG feeds the entropy pool, the VM and
its services boot as expected.
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