Nagios Warning Bug/Misconfiguration

[Patrick Morris]

On Tue, 07 Apr 2009, Thomas Donnelly wrote:

> Thanks for the quick reply!
> 
> Ran from the command line got:
> 
> # ./check_snmp -H 192.168.97.71 -o mib-2.33.1.2.4.0 -C secret -w 95: -c 75:
> SNMP WARNING - 100 | SNMPv2-SMI::mib-2.33.1.2.4.0=100;;;;
> 
> # ./check_snmp -H 192.168.97.71 -o mib-2.33.1.2.4.0 -C secret -w 95 -c 75:
> SNMP WARNING - *100* | SNMPv2-SMI::mib-2.33.1.2.4.0=100;;;;
> 
> So by intentionally triggering it again (remove ":"), it shows the *'s

How about if you add a "-v" to get verbose output?

Also, you may want to check the return code from the manual run on an OK
resultx (for example, by running "echo $?" aafter your check_snmp
command to make sure it matches what you see in the output).

What happens in my case occasionally is that I install a screwed-up MIB
for an unrelated service. It won't show any obvious errors, but it will
cause check_snmp to return a warning result code regardless of whether
the SNMP result falls within my thresholds.

In effect, it's warning me that my MIBs are hosed, based on
the fact that it got a non-OK result from snmpget (which is what
check_snmp calls to do the actual SNMP getting).



> Not really sure what they mean by:
> 
> 1. Prevent check_snmp from loading the MIBs (default behaviour) by using 
> numeric oids AND using the "-m :" option

If you a numeric OID rather than "mib-2.33.1.2.4.0" and pass the "-m :"
then check_snmp (and, by extension, snmpget) don't need to load the MIBs
at all, so you don't get an error if you've got a bad MIB.

> 
> 
> 
> 
> Patrick Morris wrote:
> > What happens when you run it manually? 
> >
> > This, maybe?
> >
> > http://www.nagios.org/faqs/viewfaq.php?faq_id=208
> >
> > On Tue, 07 Apr 2009, Thomas Donnelly wrote:
> >
> >   
> >> Hi all,
> >>
> >> I am having an issue with all of the devices I added showing warning all 
> >> the time. It is a simple snmp check to see if the amps are above 
> >> 160warn/180critical. They always say warning even though they are less 
> >> than the specified 160. One thing to note is once it hits the 160 mark 
> >> it gets the * value * in turn, showing that it is actually in the 
> >> warning range. I have shown the neccesary data I hope below. Any/all 
> >> help is greatly appreciated.
> >>
> >>
> >>
> >> # uname -a
> >> FreeBSD server.example.net 5.5-RELEASE-p2 FreeBSD 5.5-RELEASE-p2 #3: Tue 
> >> Oct  9 22:39:13 EST 2007     
> >> root at server.example.net:/usr/obj/usr/src/sys/MONITOR  i386
> >>
> >> Nagios
> >> Version 2.0b3
> >>
> >>
> >> # ./check_snmp -V
> >> check_snmp (nagios-plugins 1.4.3) 1.58
> >>
> >>
> >>
> >>  From the webui
> >>
> >> APC-RR-R3-1.hou
> >>  check_rr_amp
> >>  WARNING  04-07-2009 13:00:17   8d 3h 17m 2s  10/10  SNMP WARNING - 90
> >>
> >>  APC-RR-R3-2.hou
> >>  check_rr_amp
> >>  WARNING  04-07-2009 12:57:52  18d 2h 46m 48s  10/10  SNMP WARNING - *160*
> >>
> >> ^note the * 160 * for the one that actually is in the warning range.
> >>
> >>
> >> from checkcommands.cfg
> >>
> >> define command {
> >>        command_name check_rr_amp
> >>        command_line    $USER1$/check_snmp -H $HOSTADDRESS$ -o 
> >> mib-2.33.1.4.4.1.3.1 -C cPanel -w $ARG1$ -c $AR
> >> }
> >>
> >>
> >>  From the hosts config file.
> >>
> >> define service{
> >>        host_name                       APC-RR-R1-1.hou
> >>        service_description             check_rr_amp
> >>        check_command                   check_rr_amp!159!179
> >>        max_check_attempts              10
> >>        normal_check_interval           5
> >>        retry_check_interval            3
> >>        check_period                    24x7
> >>        notification_interval           30
> >>        notification_period             24x7
> >>        notification_options            w,c,r
> >>        contact_groups                  backup-admins
> >> }
> >>
> >>
> >>
> >> Thanks!
> >> -=Tom
> >>
> >>
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> 

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