Re: System Time

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On Sun, 2015-09-27 at 21:53 +0100, Richard W.M. Jones wrote:
> On Thu, Sep 24, 2015 at 06:18:24PM +0200, Berend De Schouwer wrote:
> > I'm currently using a cron script to touch a file every 10 minutes,
> > and
> > read that on bootup (before chronyd), and I've added a
> > 'Requires=touchClock' to some systemd services.
> 
> I think you don't need the cron script.  If you make the
> (reasonable?)
> assumption that files in /var/log are updated regularly then:
> 
> # find /var/log -type f -print0 | xargs -0 stat -c '%Y %n' /var/log |
> sort -nr | head -1
> 
> (You can omit the %n if you don't care about the actual file that is
> the newest).

I think systemd systems are supposed to move to journald.  Are there
still official /var/log files that are intended to remain over the next
few Fedora releases, and guaranteed to exist and updated?

I'm not convinced that depending on a wildcard file is robust long-
term.  It sounds like a recipe for random failures.

> 
I'm don't think depending on journald is right.  Journald starts on
initrd before the filesystem is mounted, and then moves the journal
after / is mounted; so it might be (not confirmed) that
/var/log/journal/ has a bad timestamp on boot.

> Generally, I think your plan is a good one!

I can't claim credit.  I got the idea from tedu (BSD).  There are no
original ideas.

> Would be good for my
> CubieTruck too.  How about trying to get it into systemd upstream?

I think we should.  Especially since it already ships systemd-
timesyncd.  How do we go about that?

Do I go on the systemd mailing list?  OK, away we go...
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