[Xymon] Graphing in Xymon

[Root, Paul T]

A couple hours later, and still no graph in xymon.  Ssl_error_log yields:

[Tue Sep 10 11:01:36 2019] [error] [client 10.139.63.193] Premature end of script headers: showgraph.sh, referer: https://xymon.corp.intranet/xymon-cgi/svcstatus.sh?HOST=nsmdenvp185&SERVICE=ConfigPulls

The manual graph is still getting more data in, using the exact same definitions as in graphs.cfg.

From: Root, Paul T
Sent: Tuesday, September 10, 2019 9:09 AM
To: 'Jeremy Laidman' <jeremy at laidman.org>
Cc: Japheth Cleaver <cleaver at terabithia.org>; Ralph Mitchell <ralphmitchell at gmail.com>; xymon at xymon.com
Subject: RE: [Xymon] Graphing in Xymon

Excellent, that’s probably the key.

I’ve made the change, I’m guessing I need a new input before anything can work.

rrdtool tune ConfigPulls.rrd -h NetAtoD:86400 -h NetEtoN:86400 -h NetOtoZ1to9:86400 -h Other:86400 -h InfraGen:86400 -h InfraSec:86400

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE rrd SYSTEM "http://oss.oetiker.ch/rrdtool/rrdtool.dtd">
<!-- Round Robin Database Dump --><rrd> <version> 0003 </version>
        <step> 300 </step> <!-- Seconds -->
        <lastupdate> 1568123701 </lastupdate> <!-- 2019-09-10 08:55:01 CDT -->

        <ds>
                <name> NetAtoD </name>
                <type> GAUGE </type>
                <minimal_heartbeat> 86400 </minimal_heartbeat>
                <min> NaN </min>
                <max> NaN </max>

                <!-- PDP Status -->
                <last_ds> 167 </last_ds>
                <value> NaN </value>
                <unknown_sec> 1 </unknown_sec>
       </ds>


Impatient as I am, I manually ran the script again, and then ran the rrdtool graph, and I got data points on the graph. So I should be close now.

Thanks,
Paul.

From: Jeremy Laidman <jeremy at laidman.org<mailto:jeremy at laidman.org>>
Sent: Tuesday, September 10, 2019 8:38 AM
To: Root, Paul T <Paul.Root at CenturyLink.com<mailto:Paul.Root at CenturyLink.com>>
Cc: Japheth Cleaver <cleaver at terabithia.org<mailto:cleaver at terabithia.org>>; Ralph Mitchell <ralphmitchell at gmail.com<mailto:ralphmitchell at gmail.com>>; xymon at xymon.com<mailto:xymon at xymon.com>
Subject: Re: [Xymon] Graphing in Xymon

"ds[NetAtoD].minimal_heartbeat = 600"

Isn't the minimal_heartbeat setting for telling RRD to discard samples that exist on their own? I think the idea is that it doesn't make sense to calculate values from DERIVE or COUNTER inputs. From the man page for rrdcreate:

<The "heartbeat" defines the maximum acceptable interval between samples/updates. If the interval between samples is less than "heartbeat", then an average rate is calculated and applied for that interval. If the interval between samples is longer than "heartbeat", then that entire interval is considered "unknown".>

If you're sampling once per hour, then every sample will exceed the 600 second heartbeat. So you might need to re-create (or rrdtune) your RRD file and increase the mimimal_heartbeat value.

And from the man page for rrdtune:

<--heartbeat|-h ds-name:heartbeat
modify the heartbeat of a data source. By setting this to a high value the RRD will accept things like one value per day.>

J


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