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

["Holger Hoffstätte" <holger@applied-asynchrony.com>]

On Mon, 03 Sep 2018 22:23:18 +0100, Mick wrote:

> On Monday, 3 September 2018 19:10:52 BST Holger Hoffstätte wrote:
>> 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
> 
> Thanks for this Holger, I had noticed in the logs a message just before 
> chronyd started the kernel reporting "3 urandom warning(s) missed due to 
> ratelimiting" but as this has been happening since the upgrade to 4.14.65-
> gentoo I didn't think it was kernel related.
> 
> Anyway, I can confirm 3.4_pre1 available in the tree starts up fine with no 
> delays.
> 
> However, while shutting down I noticed:
> 
> * Stopping chronyd ...
> * Error: chronyd failed to stop
> 
> This is repeatable if I try to stop it manually.  Version 3.3 didn't have this 
> problem.

Ah yes, that's from upgrading. Apologies for the misleading advice,
I fixed that locally and forgot. :}

1) Edit /etc/init.d/chronyd and change occurrences of /run/chronyd.pid to
/run/chrony/chronyd.pid (i.e. add the subdirectory).

2) file a bug so that the init file gets fixed in portage as well. :)

cheers
Holger