[Nagiosplug-help] SNMP checks for Compaq mibs

[Andreas Ericsson]

Mike Feetham wrote:
> I am trying to monitor disk space on some Compaq/HP servers, running various
> Windows platforms.  Since they already have the Compaq Insight SNMP services
> running on them, our corporate policy forbids us from installing any other
> SNMP agents, or MIB updates (like snmp4tpc).
> 
> I have created commands using the check_snmp plugin, aiming them at the OIDs
> from the Compaq mibs.
> 
>>From what I can find, the Compaq mibs will only show total drive size and
> space used.  What we really need is space free, not space used.  Other than
> writing a script to subtract used space from total space, does anyone have a
> cleaner solution for getting what we want?
> 
> Is there an OID I'm missing in the Compaq mibs that has this info?
> 

Probably not. The usual way of operations for snmp is to give out enough 
info to make anything computable (total - used = free, so that's 
computable). This is for the benefit of the serving host, since it 
doesn't have to keep track of so many things at once, and thus can save 
up a lot of memory.

> I know there are dozens of different ways to get the same results, but what
> would other Nagios users suggest is the most efficient and secure way of
> getting this SNMP info?
> 

Fetch it, compute it, match it against thresholds and give some output. 
That's how most (all?) plugins work, and there's a good reason for it. 
As for security, you should use snmp v 3, since it supports encryption.

> 
> TIA,
> 
> 
> Mike
> 
> 

-- 
Sourcerer / Andreas Ericsson
OP5 AB
+46 (0)733 709032
andreas.ericsson at op5.se