Public bug reported:
On my KVM guests, rngd starts before the virtio /dev/hwrng device is
ready, and promptly crashes.
I dont have any bug reporting tools on this system, but there should be
enough information.
Ubuntu Core 15.04 x64, dpkg edition
systemd boot
kernel 4.1.2 (not ubuntu, but very similar configuration)
modular virtio_rng - same as in ubuntu kernel
SSD backed which may make this problem more likely to show up (timing wise)
Loading virtio_rng from initramfs seems to load it early enough to
workaround the problem.
root@infra1:~# systemctl status rng-tools
● rng-tools.service - (null)
Loaded: loaded (/etc/init.d/rng-tools)
Active: failed (Result: exit-code) since ma. 2015-07-13 19:40:31 CEST; 1min
33s ago
Docs: man:systemd-sysv-generator(8)
Process: 255 ExecStart=/etc/init.d/rng-tools start (code=exited,
status=1/FAILURE)
juli 13 19:40:31 infra1 systemd[1]: Starting (null)...
juli 13 19:40:31 infra1 rng-tools[255]: Starting Hardware RNG entropy gatherer
daemon: (Ha...nd)
juli 13 19:40:31 infra1 rng-tools[255]: /etc/init.d/rng-tools: Cannot find a
hardware RNG ...se.
juli 13 19:40:31 infra1 systemd[1]: rng-tools.service: control process exited,
code=exited...s=1
juli 13 19:40:31 infra1 systemd[1]: Failed to start (null).
juli 13 19:40:31 infra1 systemd[1]: Unit rng-tools.service entered failed state.
juli 13 19:40:31 infra1 systemd[1]: rng-tools.service failed.
Hint: Some lines were ellipsized, use -l to show in full.
** Affects: rng-tools (Ubuntu)
Importance: Undecided
Status: New
** Tags: systemd-boot
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https://bugs.launchpad.net/bugs/1474080
Title:
KVM, virtio_rng, rngd starts before /dev/hwrng is up, promptly
crashes
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