[Xymon] Graphs not showing

[Scot Kreienkamp]

Are you sure data is making it into the RRD?  Try using rrdtool dump on the rrd and see if you get any data.


Scot Kreienkamp  | Senior Systems Engineer | La-Z-Boy Corporate
One La-Z-Boy Drive | Monroe, Michigan 48162 |  Office: 734-384-6403 |  |  Mobile: 7349151444 | Email: Scot.Kreienkamp at la-z-boy.com
> -----Original Message-----
> From: Xymon [mailto:xymon-bounces at xymon.com] On Behalf Of W.J.M.
> Nelis
> Sent: Monday, January 09, 2017 1:58 AM
> To: xymon at xymon.com
> Subject: [Xymon] Graphs not showing
>
> Hello,
>
> my previous post was mangled because there were some snippets of HTML
> in
> it. Therefore the message is posted again, this time without HTML.
>
>
> the status of audio streams through an Open Digital Radio multiplexer is
> monitored in Xymon. A Perl script retrieves the status and statistics from
> the multiplexer, and sent them to Xymon. The statistics are to be shown in
> graphs. However, while the RR databases are build, no graphs are shown.
>
> I am using debian 8.6 with xymon 4.3.17. (An update to version 4.3.27
> failed, as the configure script does not recognise rrdtool 1.4.8, resulting
> in a version of xymon which does not support trend graphs.) A perl script
> retrieves the status of (the input channels of) the multiplexer, and sends
> the message to xymon. The statistics are included in the format which is
> also used by devmon. The last part of the status message of test odr_mux
> contains the following as HTML comment:
>
>   linecount=2
> DEVMON RRD: odr 0 0
> DS:PeakLeft:GAUGE:600:-100:100 DS:PeakRight:GAUGE:600:-100:100 \
> DS:Underrun:DERIVE:600:0:U DS:Overrun:DERIVE:600:0:U \
> DS:BufferMin:GAUGE:600:-1:U DS:BufferMax:GAUGE:600:0:U
> sub-ozo -90:-90:176972:0:-1:0
> sub-urk -90:-90:176972:0:-1:0
>
> In xymonserver.cfg two lines are adapted:
>
> TEST2RRD=".... ,odr_mux=devmon"
> GRAPHS=" .... ,odr_mux::1"
>
> The statistics are entered in RRD's:
>
> root at debian:/var/lib/xymon/rrd/OzoNop# ls -l odr*
> -rw-r--r-- 1 xymon xymon 114560 Jan  8 19:04 odr.sub-ozo.rrd
> -rw-r--r-- 1 xymon xymon 114560 Jan  8 19:04 odr.sub-urk.rrd
> root at debian:/var/lib/xymon/rrd/OzoNop#
>
> The graph definition is:
>
> [odr_mux]
>       FNPATTERN ^odr\.(.+)\.rrd$
>       TITLE , Frame loss rate
>       YAXIS Rate [/s]
>       DEF:ur at RRDIDX@=@RRDFN@:Underrun:AVERAGE
>       DEF:or at RRDIDX@=@RRDFN@:Overrun:AVERAGE
>       LINE1:ur at RRDIDX@#FF0000:@RRDPARAM@ underrun
>       GPRINT:ur at RRDIDX@:MIN:Min \: %5.1lf %s
>       GPRINT:ur at RRDIDX@:MAX:Max \: %5.1lf %s
>       GPRINT:ur at RRDIDX@:AVERAGE:Avg \: %5.1lf %s
>       GPRINT:ur at RRDIDX@:LAST:Cur \: %5.1lf %s\n
>       LINE1:or at RRDIDX@#00FF00:@RRDPARAM@  overrun
>       GPRINT:or at RRDIDX@:MIN:Min \: %5.1lf %s
>       GPRINT:or at RRDIDX@:MAX:Max \: %5.1lf %s
>       GPRINT:or at RRDIDX@:AVERAGE:Avg \: %5.1lf %s
>       GPRINT:or at RRDIDX@:LAST:Cur \: %5.1lf %s\n
>
> The web page of this test shows the two tables, but no graphs. Only the
> magnifying glasses, which should be on the right of a graph, are shown.
> When clicking on the magnifying glass, an empty page is shown. The source
> code of this page is two lines long, the first one specifying the title to
> be "Invalid request", the second on showing an empty body.
>
> Removing the graph definition results in a link to be displayed, and the
> magnifying glass shows an appropriate error message. Further experiments
> showed that if all multi-graph stuff is removed (that is, FNPATTERN and the
> @RRD...@ parameters) a single graph is shown. Extending the graph
> definition with FNPATTERN causes to problem to surface again.
>
> The logfiles of xymon do not contain messages related to this problem, as
> far as I can see. Enabling debugging for xymond_rrd, the one spawn by the
> status channel reader, does not give any helpful information.
>
> All the other graphs, including one multi-graph (test memory), of this host
> are displayed. The problem is only visible in test odr_mux.
>
> Can anyone give me a hint on how to proceed to solve this issue?
>
> Regards,
>     Wim Nelis.
>
>
>
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> Xymon at xymon.com
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