For Centos/Fedora I would be looking at the systemd service file for
chronyd (along with the /etc/system file I mentioned), but I do not
know how Debian flavors manage services.
On 1/4/19 2:00 PM, Catherine Newman
wrote:
Thanks very much
Miroslav & Robert - I find the little things
just help so much!
A few follow ups:
- I'm running:
Raspbian Stretch Lite 4.14 (based on Debian
Stretch) and Chrony 3.4-1 with the Adafruit
PiRTC - PCF8523
- Yes, the RPI &
RTC dates are way off ... so,
- How do I ensure
that 'chronyd is started with the -s option'
programmatically? (my RPI will just reboot
when power is restored and I am not around for
that)
Catherine
On Thu, Jan 03, 2019 at
05:56:36PM -0800, Catherine Newman wrote:
> I have enabled chrony and disabled
systemd-timesyncd.service. Using rtcfile
> works well when I reboot the RPI from the command line
but when I do a hard
> powercycle (abruptly unplug it and then plug it back
in) both the system
> time and the RTC time are funky (and not the same).
Are they completely different, or just off by a whole number
of hours?
The former would indicate the kernel is not setting the
system time
from the RTC. chronyd -s should take care of that.
> What directives can I play with / what chrony.conf
might you recommend for
> me to take my timekeeping to the next level? and
hopefully give me the
> robust timekeeping I so desire out in the field.
I think a recommended configuration would look something
like this:
1) chronyd started with the -s option
2) rtcfile and driftfile specified in chrony.conf
3) rtcdevice specified in chrony.conf if /dev/rtc doesn't
point to the
right RTC
4) "chronyc writertc" called few minutes after chronyd is
started and
has synchronized the clock (e.g. using chronyc waitsync)
and then
called periodically using a cron job (e.g. few times per
day) to
keep the rtcfile up to date in case the power is lost
If that doesn't work well, it would help to see your config
files,
chronyd messages in the system log, and the chronyd's
tracking and rtc
logs.
--
Miroslav Lichvar
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