[Xymon] combine status and data in same column with graph

[Jeremy Laidman]

On 14 November 2013 03:52, Asif Iqbal <vadud3 at gmail.com> wrote:

>  You might find that adjusting the TEST2RRD variable to include only
>> "columname" and not "columnname=ncv" might do the trick.  The man page for
>> xymond_rrd talks about the "ncv" part only being used for status messages.
>>  But this is a long-shot.
>>
>
> Looks like if I do not have  columnname=ncv it does not generate a rrd
> file.
>

:-(


> I did some clean up so nothing in MSG has NCV like data and I added the
> NCV data in the <-- ... --> . It did create the rrd file with the correct
> NCV keys, but values
> are zeros. It is dropping the values for some reason? So I am almost there
> if I can figure out why the values are not showing up.
>

Are the values you're reporting counter-type (that is, always incrementing)
or gauge-type?  If you're sending gauge data and it's being treated as
counter data, then you will often get mostly zeroes or NaN.  By default,
NCV data is expected to be DERIVE which is a type of counter.  If you want
to change to GAUGE, then you need to set NCV_columnname to describe this:

NCV_columnname="foo:GAUGE,bar:GAUGE"

The other option would be using --extra-test and --extra-script and parse
> the values from the status channel to generate rrd?
>

Perhaps.  These seem a lot trickier to use.

One thought I had about this was to setup "--extra-test" and
"--extra-script" on the status channel, to filter out the status messages
from xymond_rrd.  If you use "--extra-script=/bin/true" and
"--extra-test=columnname" then I think it will feed the data to "/bin/true"
instead of parsing it itself.  Of course "/bin/true" will produce no
output, and hence no data.


>   I want the graph show up in the test page, so sending it to just trends
> won't work, right?
>

Right.  It needs to be listed in TEST2RRD to show up in the test page.

Hmm, just noticed this in the doco:

"No graph on the status page, but OK on the trends page
Make sure you have *ncv* listed in the GRAPHS setting in xymonserver.cfg.
(Don't ask why - just take my word that it must be there)."

Do you have "ncv" listed in GRAPHS?

J
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