tracing nagios actions

[Ray Kiddy]

On Dec 20, 2010, at 9:36 AM, Polifemo, Salvatore wrote:

> Yes, run the actual command from the command line as Steve demonstrated.
>  
> Make sure which command is being used, and if you run the command with no parameters it will display the correct usage.
>  
> Salvatore Polifemo
> Sr. Systems Security Specialist
> ConEdison Solutions
> 100 Summit Lake Drive
> Valhalla, NY 10595
>  

Of course, one cannot tell what command is _actually_ being executed or which command _was_ actually executed. I pointed this out in a previous post (below). Apparently there are no workarounds for this.

- ray

Begin forwarded message:

> From: Ray Kiddy <ray at ganymede.org>
> Date: November 17, 2010 9:42:59 AM PST
> To: Nagios Users List <nagios-users at lists.sourceforge.net>
> Subject: [Nagios-users] can log show actual command executed?
> Reply-To: Nagios Users List <nagios-users at lists.sourceforge.net>
> 
> 
> I am having a problem figuring out see what is actually being executed from a service. Is there a way to get the nagios log to contain the actual command being executed?
> 
> This is what I am seeing in the Nagios.log file:
> 
> 	[1290013792] SERVICE ALERT: myhost.com;Special App;CRITICAL;SOFT;1;(Service Check Timed Out)
> 
> This is what I see in the nagios.dat file:
> 
> 	check_command=check_http!/myURL!alive
> 
> So, this shows me what the command string is in the service.cfg. I cannot see, though, what the actual command line is at this moment in time. It turns out that this check_command corresponds (I think) to:
> 
> 	check_http -u /myURL -s alive
> 
> How would I know this, though, if the command definition had been changed or if it is using, because of a mis-spelling, a command I do not think it is using? If I go into the command.cfg and switch the order of parameters, for example, I see nothing in these logs that tells me what is doing what.
> 
> I know the simplest answer is "You should not do that." But my point is that the log file does not have enough information to tell me what happened at a past moment of time. I would need the log information _and_ the state of the command definitions at that time. If a log does not show you what happened in the past, what is its purpose?
> 
> I am having a problem with a particular web application. For some reason I put in the check and it fails. I execute the check_http that I _think_ this service is doing, and it gives me an OK. I ended up creating a custom executable that calls curl and fetches against the same URL and this now works fine. Kind of lame, though. I use check_http in about 100 other services. So, why is this one single service not working? An obvious answer is that I am not calling the command in the way I think I am. But if I look in the log to see what the service did, I can see what I _think_ it did based on what I can see in what I _think_ is the correct command definition. But I really do not know. I do not see a line like "check_http -u /myURL -s alive" in the log, so, I cannot see if I am mis-reading things.
> 
> Any suggestions?
> 
> - ray
> 



> From: steve f [mailto:a31modela at hotmail.com] 
> Sent: Monday, December 20, 2010 12:14 PM
> To: nagios-users at lists.sourceforge.net
> Subject: Re: [Nagios-users] tracing nagios actions
>  
> Mark,
> 
> I think Salvatore means run the check manually from the command line , make sure you run it as the nagios user and try setting tha warning & critical values to something that will make it fail also:
> 
> /usr/local/nagios/libexec > ./check_disk -w 50 -c 70 -p /home
> DISK OK - free space: /home 440 MB (95% inode=99%);| /home=20MB;436;416;0;486
> 
> The -p just checks a specific path.  ( FYI )
> 
> Steve
> 
> 
> 
> 
> Date: Mon, 20 Dec 2010 11:50:14 -0500
> From: gopearls42 at gmail.com
> To: nagios-users at lists.sourceforge.net
> Subject: Re: [Nagios-users] tracing nagios actions
> 
> Hi Salvatore,
>  
> They're all Unix (Redhat) servers. By check command do you mean nagios -v? I've done that and I do not get an errors.
>  
> Thanks,
> Mark
>  
> On Mon, Dec 20, 2010 at 11:35 AM, Polifemo, Salvatore <polifemos at conedsolutions.com> wrote:
> Are these Windows or *nix server?
>  
> Either wau run the check command manually from a console and see what the results are.
>  
>  
>  
> Salvatore Polifemo
> Sr. Systems Security Specialist
> ConEdison Solutions
> 100 Summit Lake Drive
> Valhalla, NY 10595
>  
> From: mark bradley [mailto:gopearls42 at gmail.com] 
> Sent: Monday, December 20, 2010 11:14 AM
> To: nagios-users at lists.sourceforge.net
> Subject: [Nagios-users] tracing nagios actions
>  
> Hi,
>  
> I have a small-ish number of servers and I've tried to configure Nagios to warn me about disk-space running low. The problem is that, although disk space is above both warning and critical levels I'm not getting any notifications.
>  
> The nagios.log file is silent on the topic and nagios -v does not produce any errors or warnings.
>  
> Is there a way to trace what actions nagios is considering (much like make -n) in order to debug this problem? Is there a debugging methodology defined somewhere? If it's in your head can you share?
>  
> Thanks,
> Mark
> 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.monitoring-lists.org/archive/users/attachments/20101220/c7a0c268/attachment.html>
-------------- next part --------------
------------------------------------------------------------------------------
Lotusphere 2011
Register now for Lotusphere 2011 and learn how
to connect the dots, take your collaborative environment
to the next level, and enter the era of Social Business.
http://p.sf.net/sfu/lotusphere-d2d
-------------- next part --------------
_______________________________________________
Nagios-users mailing list
Nagios-users at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nagios-users
::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. 
::: Messages without supporting info will risk being sent to /dev/null