tracing nagios actions

[mark bradley]

There's always strace(1) if you want to dive into the details ...

Mark

On Mon, Dec 20, 2010 at 1:18 PM, Ray Kiddy <ray at ganymede.org> wrote:

>
> 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
>
>
>
>
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