[Xymon] Graphing in Xymon

Mon Sep 16 22:38:27 CEST 2019

On Tue, 17 Sep 2019 at 05:53, Root, Paul T <Paul.Root at centurylink.com>
wrote:

> 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*
>

This won't work. The showgraph.cgi binary expects to be run as a CGI and
requires QUERY_STRING to be set (to
host=nsmdenvp185&service=ncv:ConfigPulls&graph_width=...) and
REQUEST_MATHOD to be set to "GET". It also expects SCRIPT_NAME to be set
(and normally it would be showgraph.sh) but I think this only generates
warnings.

Try running like so:

SCRIPT_NAME=showgraph.sh REQUEST_METHOD=GET
QUERY_STRING='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'
./showgraph.sh

The output will be partly binary, so you might want to try:

SCRIPT_NAME=showgraph.sh REQUEST_METHOD=GET
QUERY_STRING='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'
./showgraph.sh | sed '1,/^$/d' | file -

and see if it shows that a PNG file format was generated.

If this doesn't work, check for a service name such as "cpu" that is known
to work, rather than your custom "ncv:ConfigPulls".

>
> Content-type: text/html
>
>
>
> <html><head><title>Invalid request</title></head>
>
> <body>Invalid request - no host or service</body></html>
>

Yep, cos no QUERY_STRING.

>
> $ *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
> <https://nsmdenvp117.corp.intranet/xymon-cgi/showgraph.sh%5C?host=nsmdenvp185%5C&service=ncv:ConfigPulls%5C&graph_width=576%5C&graph_height=120%5C&disp=nsmdenvp185%5C&nostale%5C&color=blue%5C&graph_start=1568489816%5C&graph_end=1568662616%5C&graph=hourly%5C&action=view>*
>
> <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
>
> <html><head>
>
> <title>500 Internal Server Error</title>
>

This works for me (substituting my own Xymon servername, hostname and
service.

</head><body>
>
> <h1>Internal Server Error</h1>
>

Check your Apache/webserver logs for the cause.

>
>
>
>
>
>
> 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?
>

I don't think so. I have a graph that shows with
"service=bind9-stats-extended" which is longer than your "nsv:ConfigPulls"
including the prefix.

J

>
>
>
>
>
>
>
> *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>
> *Sent:* Tuesday, September 10, 2019 11:46 AM
> *To:* Root, Paul T <Paul.Root at CenturyLink.com>
> *Cc:* Japheth Cleaver <cleaver at terabithia.org>; Ralph Mitchell <
> ralphmitchell at gmail.com>; 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>
> 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>
> *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>
> *Sent:* Tuesday, September 10, 2019 8:38 AM
> *To:* Root, Paul T <Paul.Root at CenturyLink.com>
> *Cc:* Japheth Cleaver <cleaver at terabithia.org>; Ralph Mitchell <
> ralphmitchell at gmail.com>; 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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