Leap seconds
Paul Theodoropoulos
paul at anastrophe.com
Sun Jan 14 20:46:38 UTC 2018
(I should add that I just found Bulletin C of the IERS, which one can
subscribe to, which is an alternative to running ntpleapfetch from cron
and instead running it manually upon an announcement of an upcoming leap
sec).
On 1/14/2018 12:33 PM, Paul Theodoropoulos wrote:
> I am confused about leapseconds. My understanding is that this
> confusion is not an unusual state. :)
>
> I'm running a Raspberry Pi 1 Raspian Stretch Stratum one server, built
> to the spec of the Stratum-1-Microserver HOWTO on the ntpsec.org site.
> The example/suggested ntp.conf file in that document makes no mention
> of leapseconds. https://docs.ntpsec.org/latest/ntp_conf.html lists the
> leapfile directive, but the ntp.conf manpage does not, only mentioning
> it in regard to crypto functions. Though both mention the
> leapsmearinterval directive, making clear not to run that on a public
> server.
>
> Among the tools included with the NTPsec suite is ntpleapfetch, which
> would imply (to me at least) that this is a task that should be
> performed - though I'm also unclear on appropriate intervals. Perform
> it one minute before midnight on June 30 and Dec 31? Check monthly on
> the rare possibility of a leapsec at some other time?
>
> So, I'm confused. Should I employ ntpleapfetch from cron and include
> the leapfile directive in my ntp.conf? Or is it best to exclude all of
> this on a public NTPsec server?
>
> I'm interested in conforming to best-practices.
>
--
Paul Theodoropoulos
www.anastrophe.com
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