Nagios Strategies

[Matthew Joyce]

Josh, 

I am just checking that the service is in a running state, I'm checking
the SNMP service state via SNMP.
That should be fine yes ?

I too have sent he SNMP service fail but appear running and dealt with
the torrent of notifications.
I wrote a python script to search my services.cfg for definitions
name-beings-with 'win_snmp', and generate a service dependency config
for each host.
I'll try some tests later this month.

I hope a simple same host service dependency directive will be included
with v3.

mj


-----Original Message-----
From: Josh Yost [mailto:Josh.Yost at epsiia.com] 
Sent: Friday, 22 December 2006 11:05 AM
To: Matthew Joyce
Cc: nagios-users at lists.sourceforge.net
Subject: Re: [Nagios-users] Nagios Strategies

Hi,
	Just my quick two cents - I've seen several times on our servers
(mostly on Windows 2000) that the SNMP service will be shown as running
even though the actual process has stopped responding.  Then, we get a
flood of pages for all of our checks dependent on SNMP and have to
manually kill and restart the service.

If you're going to do a generic SNMP check, just make sure it's actually
pulling a value from SNMP because a simple NT check to see if the
service is in the running state isn't very reliable.

(we aren't actually using service deps. yet, but it's something I'm
getting around to since we're in the same boat as you =)).

- Josh


Matthew Joyce wrote:
> Hi all,
> 
> I've found myself in a quandary and I'm wondering how other Nagios 
> uses have address similar problems.
> We've recently upgraded to 2.6 and I've been tidying up the configs, 
> sorting out service groups, etc.
> 
> I've been adding checks for specific windows services, Exchange, 
> Backup Exec, various MS SQL databases and that sort of thing.
> The more services I add, the more I consider their dependencies on 
> each other.
> SNMP service is now a critical service, as without it I will get a 
> storm of notification.
> 
> I can see that service dependencies would fix this but it does seem 
> overly complex to have to list each host/service pair in the 
> dependency definition.
> 
> One way I thought might work is to create a servicegroup called 
> myserversnmp and add the service to the group in the service
definition.
> Then, in the dependency definition, make that servicegroup dependent 
> on SNMP Service on the host.
> 
> This would mean I end up with a load of servicegroups, but make 
> configuring easier as I just need to add one line per service and 
> that's often done with copy/past/tweak.
> 
> An alternative might be to regular expressions, but for me this would 
> be an obfuscation, not really what I'm after.
> It would be nice if there was a service dependency directive in the 
> service definition.
> 
> How do others manage dependencies ?
> 
> 
> 
> Thanks
> 
> Matt
> 
> 
> 
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