[Xymon] Graphing in Xymon

Mon Sep 16 21:53:09 CEST 2019

Looping back on this:

Running the showgraph by hand

$ ./showgraph.sh host=nsmdenvp185 service=ncv:ConfigPulls graph_width=576 graph_height=120 disp=nsmdenvp185 nostale color=blue graph_start=1568489816 graph_end=1568662616 graph=hourly action=view

Content-type: text/html

<html><head><title>Invalid request</title></head>
<body>Invalid request - no host or service</body></html>

$ ls /var/lib/xymon/rrd/nsmdenvp185/ConfigPulls*
/var/lib/xymon/rrd/nsmdenvp185/ConfigPulls.rrd
root nsmdenvp117:/usr/lib64/xymon/cgi-bin
$ cat ~ptroot/crap2
#!/bin/bash

$ curl -k https://nsmdenvp117.corp.intranet/xymon-cgi/showgraph.sh\?host=nsmdenvp185\&service=ncv:ConfigPulls\&graph_width=576\&graph_height=120\&disp=nsmdenvp185\&nostale\&color=blue\&graph_start=1568489816\&graph_end=1568662616\&graph=hourly\&action=view
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>500 Internal Server Error</title>
</head><body>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error or
misconfiguration and was unable to complete
your request.</p>
<p>Please contact the server administrator,
ms2sys at CenturyLink.com and inform them of the time the error occurred,
and anything you might have done that may have
caused the error.</p>
<p>More information about this error may be available
in the server error log.</p>
<hr>
<address>Apache/2.2.15 (CentOS) Server at nsmdenvp117.corp.intranet Port 443</address>
</body></html>

Again, if I run rrdtool graph by hand, I get a good graph..

Could this be the Test name is too long for showgraph, or maybe doesn’t like mixed case?

From: Xymon <xymon-bounces at xymon.com> On Behalf Of Root, Paul T
Sent: Wednesday, September 11, 2019 8:26 AM
To: 'Jeremy Laidman' <jeremy at laidman.org>
Cc: xymon at xymon.com
Subject: Re: [Xymon] Graphing in Xymon

Looking this morning. There is no change, no graph.

Manually making the graph works perfectly.

From: Jeremy Laidman <jeremy at laidman.org<mailto:jeremy at laidman.org>>
Sent: Tuesday, September 10, 2019 11:46 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

I thing RRD needs two or more consecutive data points before it produces results. If you add more than one within a timeslot, it rejects the second and subsequent ones. If you've configured your RRD file to work on an hourly basis, you need to wait 2-3 hours.

On Wed, 11 Sep 2019 at 02:07, Root, Paul T <Paul.Root at centurylink.com<mailto:Paul.Root at centurylink.com>> wrote:
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<mailto:jeremy at laidman.org>>
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

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:

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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This communication is the property of CenturyLink and may contain confidential or privileged information. Unauthorized use of this communication is strictly prohibited and may be unlawful. If you have received this communication in error, please immediately notify the sender by reply e-mail and destroy all copies of the communication and any attachments.
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