[Xymon] Graphing in Xymon

Thu Sep 19 19:03:01 CEST 2019

Ah, that got it.  I had REQUEST_METHOD=get on the same line as SCRIPT_NAME, effectively making the command “showgraph REQUEST_METHOD=GET”

Also, the QUERY_STRING does not want the ncv: in it.

ConfigPulls yields:
$ $SCRIPT_NAME
Content-type: text/html

<html><head><title>Invalid request</title></head>
<body>Unknown graph requested</body></html>

While cpu, and another custom graph we have (proc-mem) both work fine.

I’m thinking the upper case maybe causing the issue. I’m going to try to rename the test to lowercase.

From: Jeremy Laidman <jeremy at laidman.org>
Sent: Wednesday, September 18, 2019 6:47 PM
To: Root, Paul T <Paul.Root at CenturyLink.com>
Cc: xymon at xymon.com
Subject: Re: [Xymon] Graphing in Xymon

Following your commands, the only suggestion is that the variables might not have been set correctly. Perhaps run "echo $QUERY_STRING; echo $REQUEST_METHOD; echo $SCRIPT_NAME" immediately before "$SCRIPT_NAME".

In case my instructions were amiss, here's another example of debugging showgraph.sh to follow:

https://lists.xymon.com/archive/2012-July/035214.html<https://imss91-ctp.trendmicro.com:443/wis/clicktime/v1/query?url=https%3a%2f%2flists.xymon.com%2farchive%2f2012%2dJuly%2f035214.html&umid=53F7D197-92DC-7705-AA3B-96B005793723&auth=19120be9529b25014b618505cb01789c5433dae7-0da69dac38e7cd9a0ec0cb613ccf621beba4f183>

J

On Wed, 18 Sep 2019 at 04:32, Root, Paul T <Paul.Root at centurylink.com<mailto:Paul.Root at centurylink.com>> wrote:
I must be doing something group here, neither worked:

$ SCRIPT_NAME=showgraph.sh REQUEST_METHOD=GET
root nsmdenvp117:/etc/xymon/analysis.d
$ 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'
$ PATH=$PATH:/usr/lib64/xymon/cgi-bin
$ type showgraph.sh
showgraph.sh is /usr/lib64/xymon/cgi-bin/showgraph.sh
$ showgraph.sh
Content-type: text/html

<html><head><title>Invalid request</title></head>
<body>Invalid request - no host or service</body></html>
$ export QUERY_STRING
$ export SCRIPTNAME
$ $SCRIPTNAME
$ export SCRIPT_NAME
$ $SCRIPT_NAME
Content-type: text/html

<html><head><title>Invalid request</title></head>
<body>Invalid request - no host or service</body></html>
$ QUERY_STRING='host=nsmdenvp185&service=cpu&graph_width=576&graph_height=120&disp=nsmdenvp185&nostale&color=blue&graph_start=1568489816&graph_end=1568662616&graph=hourly&action=view'
$ $SCRIPT_NAME
Content-type: text/html

<html><head><title>Invalid request</title></head>
<body>Invalid request - no host or service</body></html>
$ file /usr/lib64/xymon/cgi-bin/showgraph.sh
/usr/lib64/xymon/cgi-bin/showgraph.sh: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, stripped

From: Jeremy Laidman <jeremy at laidman.org<mailto:jeremy at laidman.org>>
Sent: Monday, September 16, 2019 3:38 PM
To: Root, Paul T <Paul.Root at CenturyLink.com<mailto:Paul.Root at CenturyLink.com>>
Cc: xymon at xymon.com<mailto:xymon at xymon.com>
Subject: Re: [Xymon] Graphing in Xymon

On Tue, 17 Sep 2019 at 05:53, Root, Paul T <Paul.Root at centurylink.com<mailto: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://imss91-ctp.trendmicro.com:443/wis/clicktime/v1/query?url=https%3a%2f%2fnsmdenvp117.corp.intranet%2fxymon%2dcgi%2fshowgraph.sh%255C%3fhost%3dnsmdenvp185%255C%26service%3dncv%3aConfigPulls%255C%26graph%5fwidth%3d576%255C%26graph%5fheight%3d120%255C%26disp%3dnsmdenvp185%255C%26nostale%255C%26color%3dblue%255C%26graph%5fstart%3d1568489816%255C%26graph%5fend%3d1568662616%255C%26graph%3dhourly%255C%26action%3dview&umid=53F7D197-92DC-7705-AA3B-96B005793723&auth=19120be9529b25014b618505cb01789c5433dae7-99d13073304ea227297a4aef5b6bce69d989c333>
<!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>

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