Attempting to monitor the "Nagios Server" itself

[Bret Goodfellow]

Thanks Marc,

I basically copied the services config from another (remote_services)
config file.  I then changed the host to Colorado.  I should have looked
closer at the plugins being executed.  Anyway, I removed all but one
service check, and the host is now being monitored.   Process of
Elimination.... go figure.  I will now add them back in, one by one.
Thanks again.

Bret 

-----Original Message-----
From: nagios-users-bounces at lists.sourceforge.net
[mailto:nagios-users-bounces at lists.sourceforge.net] On Behalf Of Marc
Powell
Sent: Tuesday, August 12, 2008 4:34 PM
To: Nagios User list
Subject: Re: [Nagios-users] Attempting to monitor the "Nagios Server"
itself

Please always respond on list so that others, now and in the future,  
obtain the benefit of your experience. More below...


On Aug 12, 2008, at 4:36 PM, Bret Goodfellow wrote:

> Hi Marc,
>
> Thanks for the quick response!  I added the following host definition:
>
>
########################################################################
##############
> # 'colorado' host  
> definition                                                         #
>
########################################################################
##############
> define host{
>        use                     generic-host            ; Name of  
> host template to use
>
>        host_name               colorado
>        alias                   colorado
>        address                 10.8.64.201
>        check_command           check-host-alive
>        contact_groups          linux-admins,linux-admins-page,oracle- 
> admins
>        max_check_attempts      10
>        max_check_attempts      10
>        notification_interval   480
>        notification_period     24x7
>        notification_options    d,u,r
>        }
>
> After adding this definition, I noticed on the nagios monitor that I  
> have "1" pending host.  This "pending status" never changes.  The  
> pending host of course, is colorado.

Pending is normal for a host with no services. It'll never be checked.  
That's expected.

> Adding the host definition for "colorado" only, does not cause  
> nagios to fail.

Good to know.

> The failure occurs when I add the attached "services" config file.   
> If I remove the "colorado" services config file, then nagios starts  
> up and runs fine.  My belief though, is that there is something  
> wrong with the "host" definition file.

Why do you believe that? It looks OK to me. I would think the problem  
is somehow associated with the newly included services file or  
something external to nagios.

> Since the server I want to monitor is the "localhost", do I need to  
> replace the alias with the name "localhost".

No, the alias doesn't matter, it's just for humans to know what the  
machine is. I don't see anything obviously wrong with the file*. I  
would try adding it in chunks of a few definitions at a time and see  
which one causes nagios to segfault. Jon Agliss's strace suggestion is  
good as well. I'd use 'strace -fs512 /usr/local/nagios/bin/nagios -d / 
usr/local/nagios/etc/nagios.cfg' myself.

* Some of the tests you're doing, just based on their names, could be  
implemented better. For example, why are you ssh'ing to the same  
machine, essentially a localhost IP, (check_ssh_disk) or using snmp  
(check_snmp_storage) to check disks when it seems that just using  
check_disk would do the same thing without the hoops and points-of- 
failure.

--
Marc


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