[time-nuts] monitoring NTP servers?

Tim Shoppa tshoppa at gmail.com
Wed Aug 26 10:56:20 EDT 2015

Example monitoring graphs and criteria might be those done by pool.ntp.org:

I believe they send out E-mails to server owners based on criteria.

I don't personally agree with all of the details of their criteria, it
seems to be oriented more towards one-shot ntpdate type usage, rather than
long-term ntpd type source selection.

But of course ntpd has its own peer selection criteria, that I favor
myself: https://www.eecis.udel.edu/~mills/ntp/html/select.html

Tim N3QE

On Wed, Aug 26, 2015 at 3:47 AM, Anders Wallin <anders.e.e.wallin at gmail.com>

> Hi all,
> Is there a ready made set of scripts for monitoring a bunch of NTP servers?
> Preferably for generic unix/linux like ubuntu.
> I imagine it would look something like:
> 1. measure data with a test machine, either use output of "ntpq -p" or
> perhaps python and ntplib. Variable measurement interval, perhaps 60s or
> so.
> 2. store relevant data into RRDTool database (offsets, delay, jitter, etc)
> 3. produce graphs with RRDGraph, and possibly Alarms (e-mail?) if a server
> goes offline or way out of sync.
> thanks,
> Anders
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