Re: [chrony-users] Delaying postfix until chronyd gets the time

[Bill Unruh <unruh@xxxxxxxxxxxxxx>]

On Fri, 21 Apr 2017, Robert Moskowitz wrote:

> Gaining understanding...
>
> On 04/21/2017 06:21 AM, Miroslav Lichvar wrote:
> > On Fri, Apr 21, 2017 at 05:59:12AM -0400, Robert Moskowitz wrote:
> > > I was looking at the man for chronyd, and saw that the man for 2.1.1 says 
> > > it
> > > uses the drift file:
> > >
> > >                If  chronyd doesn't support the RTC on your computer or 
> > > there
> > > is
> > >                no RTC installed, the system clock will be set with this
> > > option
> > >                forward  to  the time of the last modification of the drift
> > > file
> > >                (specified by the driftfile directive)  to  restore the
> > > system
> > >                time at which chronyd was previously stopped.
> > You are right. The difference between 2.1.1 and 2.2 actually is that
> > 2.1.1 uses the driftfile only when the RTC is missing. If there is an
> > RTC, but it is in the past (e.g. it has no battery to keep the time
> > when the system was powered off), the driftfile will not be used to
> > restore the system time.
> >
> > However, you could force chronyd to ignore the RTC by setting
> > rtcdevice to a nonexistent device and always use the driftfile, e.g.
> >
> > rtcdevice /dev/doesnotexist
>
> Where do I get the command, rtcdevice?  It is not on my system. Then how do I 
> run it?  Do I add an ExecStartPre= to the chronyd.service file?

It is a line in chrony.conf. It is not a separate command.

> And do I create a /etc/sysconfig/chronyd with the single line:
>
> OPTIONS= -s
>
> ?
>
>
> > > What does the rtcsync in chronyd.conf do?
> > It tells the kernel to periodically set the RTC to the system time.
> > With no battery, that would probably be useful only for reboots.
> Got it.

--
To unsubscribe email chrony-users-request@xxxxxxxxxxxxxxxxxxxx 
with "unsubscribe" in the subject.
For help email chrony-users-request@xxxxxxxxxxxxxxxxxxxx 
with "help" in the subject.
Trouble?  Email listmaster@xxxxxxxxxxxxxxxxxxxx.