[gentoo-user] Re: chrony-3.3 hangs at boot

[Holger Hoffstätte]

On Mon, 03 Sep 2018 17:48:53 +0100, Mick wrote:

> I just noticed today chronyd hangs during boot for a minute and a half.  The
> logs do not reveal anything amiss.  I suspect it waits for a network
> connection, which is not yet up when chronyd launches.
>
> Sep  3 17:38:26 asus syslog-ng[1858]: syslog-ng starting up; version='3.13.2'
> Sep  3 17:38:26 asus chronyd[1930]: chronyd version 3.3 starting (+CMDMON +NTP
> +REFCLOCK +RTC -PRIVDROP +SCFILTER -SIGND +ASYNCDNS -SECHASH +IPV6 -DEBUG)
> Sep  3 17:38:26 asus chronyd[1930]: Frequency -13.776 +/- 1.023 ppm read from
> /var/lib/chrony/drift
> Sep  3 17:38:26 asus acpid[1894]: starting up with netlink and the input layer
> Sep  3 17:38:26 asus acpid[1894]: 1 rule loaded
> Sep  3 17:38:26 asus acpid[1894]: waiting for events: event logging is off
> Sep  3 17:40:57 asus kernel: random: crng init done
> Sep  3 17:40:57 asus kernel: random: 3 urandom warning(s) missed due to
> ratelimiting
> Sep  3 17:40:57 asus chronyd[1930]: Loaded dump file for 10.10.10.1
>
>
> Have you noticed the same?
>
> Is there a fix/workaround for this?

Yes and yes; countless people have been hit by this, I was probably the first
to notice/debug it. It happens due to changes in Linux' random number
generator, which is now slowly making it into older kernels as well.

If you're interested in the gory details you can read about them
in the thread "Chrony vs. Linux RNG" at [1] or just update to chrony-3.4rc1
which contains the "fix". Despite being an rc1 it works fine as usual,
so short of applying the patch to your local build this is the easiest
option.

cheers,
Holger

[1] https://listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-users/2018/04/threads.html#00036