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List:       omd-users
Subject:    [omd-users] writing a time series check
From:       james.todd () jivesoftware ! com (James Todd)
Date:       2011-06-07 14:37:54
Message-ID: A938BD4F-3A2D-4F23-ADFA-ABD63A4AF59F () jivesoftware ! com
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thx markus.

this route does provide maximum flexibility.

very much appreciated,

- james

On Jun 7, 2011, at 1:15 AM, Markus Joosten wrote:

James,

why not try a completely different approach?
Instead of parsing rrd-files, I'd suggest designing your plugin so that it writes the \
last captured value to a file and, during the next run, compares the historical value \
to the recent measured one. I'd recommend to use a csv format for that, where you \
might also include a timestamp (or check the file's last modified time) to ensure the \
freshness of the historical data.

Hope that helps a bit!

Regards,
Markus

Am 07.06.2011 um 09:51 schrieb "James Todd" <james.todd at \
jivesoftware.com<mailto:james.todd at jivesoftware.com>>:


Hey Mathias -

  Based on a bit of searching, I believe what I am looking for is to execute an \
rrdtool.fetch(...) operation from within a check, passing along the correct rrd path.

  In searching through the default checks (as deployed via omd) i don't see any uses \
of rrd* from within the check scripts.

  Am I on the right path here? wrong path? regardless, I could use a pointer on how \
best retrieve historic data from within a check in order to perform a time-series  \
calculation.

  thx in advance,

- james

On Jun 6, 2011, at 12:26 AM, Mathias Kettner wrote:

> Hi James,
> 
> please have a look at this:
> 
> http://mathias-kettner.de/checkmk_writing_checks.html>
> Am 05.06.2011 21:01, schrieb James Todd:
> > 
> > hi -
> > 
> > i am new to omd/check_mk/nagios/python. i have the basics up and running and am \
> > collecting data from our application nodes. what i would like to now do is \
> > perform a time-series check and as such could use a pointer. 
> > i am not sure "time series" check is the correct terminology so let me describe \
> > what i would like to achieve at a bit of a higher level, specifically: 
> > for a given check "a"
> > when this check is performed, i would like to retrieve previously captured values \
> > and perform a calculation against the set 
> > eg: check if we counter-x has not increased more then y% over the last 30 minutes \
> > then return critical 
> > i assume this is done via accessing the rrd data. i will continue to dig in and \
> > research but at the same token i very much appreciate more directed help those on \
> > this list can offer. 
> > thx in advance,
> > 
> > - james
> > _______________________________________________
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> > lists.mathias-kettner.de>>> \
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> 
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