NagiosGrapher: How do the links work?

[Arno Lehmann]

Hi,

On 1/25/2006 11:42 PM, Hugo van der Kooij wrote:
> Hi,
> 
> I am trying to get NagiosGrapher up and running. I get some graphs but how
> can one see the graphs unless you explicitly go to /cgi-bin/graphs.cgi ?

Nagiosgrapher installs serviceextinfo definitions automatically. It's 
some time ag that I set it up, but let's see...

>         serviceext_type         MULTIPLE
>         serviceextinfo          /etc/nagios2/serviceextinfo.cfg
>         serviceext_path         /etc/nagios2/serviceext
>         url                     /nagios2/cgi-bin/graphs.cgi

is from my ngraph.ncfg. serviceext_type MULTIPLE tells nagiosgrapher to 
create a file for each host in the directory given in serviceext_path.

> The sample config show a part like:
> icon_image_tag          dot.gif' border="0"></a><a target="_blank" href="graphs.cgi?###URL###" border="0"><img src="/nagios/images/logos/graph.png" border="0"logos/dot.gif
> 
> But however I twist and turn I see no way anything good can come from
> that line. (I suppose the normal result from dot.gif would be a webpage
> with a <img src="dot.gif"> bit included.

I couldn't, too, but it works nonetheless. :-)

> So I am still puzzled in the way the link to the graphs should become part
> of the normal nagios config.

You've got to set up nagios to read the file(s) nagiosgrapher creates:
In my nagios.cfg I have:

> # The following line is for nagios_grapher. This should be the only place where
> # service extended information is stored!
> cfg_dir=/etc/nagios2/serviceext

That information is only read when nagios starts or when it's reloading 
the configuration after a SIGHUP.

Afterwards, you should see icons for the graphs nagiosgrapher creates, 
and they should link to the right cgis. Here it works.

I never tried it, but setting up serviceextinfo for nagiosgrapher and 
manually or by other tools might become painful.

> (In fact I am puzzled by much more but let's take it one step at the
> time.)

Let nagiosgrapher write a detailed log and observe what happens in 
there. tail -f is just the tool for that...

> Hugo.
> 

Arno

-- 
IT-Service Lehmann                    al at its-lehmann.de
Arno Lehmann                  http://www.its-lehmann.de


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