Thanks for the insight.
I got it working.
Paul.
Paul Root - Engineer III Managed Services Systems - CenturyLink
-----Original Message----- From: Christoph Schug [mailto:cs at schug.net] Sent: Wednesday, November 16, 2011 4:31 AM To: Root, Paul Cc: xymon at xymon.com Subject: Re: [Xymon] graphing.
On Tue, 15 Nov 2011 18:24:36 -0600, "Root, Paul" <Paul.Root at CenturyLink.com> wrote:
So, now however, I'm lost on the actual graph creation. I don't understand the GPRINT lines at all, are they putting in legend or min/max history? Or is it defining the scale of the graph. And I'm not too sure about the DEF line either, what's the keyword AVERAGE saying there? The data is all integer, number of events, do I sti
I basically just stole the lines from hobbitd since that's the same sort of data.
[nfmsgw] TITLE NFMS Gateway Events YAXIS Unprocessed Events DEF:events=nfmsgw.rrd:Events:AVERAGE LINE2:events#00CCCC:Unprocessed Events GPRINT:events:LAST: \: %5.1lf (cur) GPRINT:events:MAX: \: %5.1lf (max) GPRINT:events:MIN: \: %5.1lf (min) GPRINT:events:AVERAGE: \: %5.1lf (avg)\n
Most of the graph definition isn't Xymon specific at all but gets simply passed to the RRD library. The GPRINT stuff just adds you some additional lines of text into the graph. See http://oss.oetiker.ch/rrdtool/doc/rrdgraph_graph.en.html for details. This is done several times for the same variable ("value") using different Consolidation Functions. According to http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html there is
"AVERAGE": the average of the data points is stored "MIN": the smallest of the data points is stored "MAX": the largest of the data points is stored "LAST": the last data points is used
From cosmetic point of view for example you might want to change the "%5.1lf" to "%5.0lf" all except AVERAGE as you stated that you're dealing with integers only.
I found it easiest and quickest to trace down errors in the graph definition by just reproducing the stuff on command line. You only need to transform the "TITLE" and "YAXIS" tags into "--title" and "--vertical-label" command line arguments to "rrdtool graph". If the RRD file is not in your current working directory just specify the path to it, if there are any @COLOR@ magic thing (which is not the case in yours) then replace them with something suitable in RGB notations, e.g. "0000ff" or "00ff00".
In you case that would be something like
$ rrdtool graph /var/tmp/mygraph.png -a PNG
--title 'NFMS Gateway Events' --vertical-label 'Unprocessed Events'
'DEF:events=/path/to/nfmsgw.rrd:Events:AVERAGE'
'LINE2:events#00CCCC:Unprocessed Events'
'GPRINT:events:LAST: \: %5.1lf (cur)'
'GPRINT:events:MAX: \: %5.1lf (max)'
'GPRINT:events:MIN: \: %5.1lf (min)'
'GPRINT:events:AVERAGE: \: %5.1lf (avg)\n'(Note: when doing so, rrdtool graph is pretty picky about whitespace, so be sure to have the single quote directly before GPRINT and not some space in between)
If something is wrong, rrdtool should give you an error which might be more helpful than anything from the logs.
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