5 Nagios General Questions

[Justin Williams]

1- are you sure the config file you're editing and the config file you're
loading are the same file?  Mine are simply in /etc/nagios/nagios.cfg and
below; not sure where the /usr/local comes from, but,that may be
distro-relative...
2- take a look at your commands.cfg file.  That's where email message
formatting is, among other things, and might give you a bit more info on
what is supposed to be sent.  You might also check the messages log on your
nagios server to see what you can see in there.
3- download plug-in, move to nagios' plug-ins folder (called libexec on my
box - specifically, /usr/nagios/libexec).  Make sure nagios has permissions
to execute said plugin.  Define the command to use it in the commands.cfg
file as above, and use it in whatever config you use to define your
services.
4- Do you have mrtg installed?  For switches/routers, I'm OK with knowing
they're pingable.  If they're pingable, and the box on the other side isn't,
my suspicion then turns to my box being down.  If it is still up, I'd
consider routing issues...
5- snmp can be used for that - just make sure that you're using a read-only
community to communicate with your routers...  Otherwise, you're
broadcasting information that can be used to change the snmp settings on
your devices, and can really get into deep ca-ca going through THAT bit of
fun!!  You just need to know what information you want to pull from your
devices, and translate that to whatever mip your device is throwing out
there - snmpwalk is very helpful for that...

On Thu, Oct 22, 2009 at 3:29 PM, Goutos, Kevin <kgoutos at libertymgt.com>wrote:

> Hi all,
>
> I have a few general Nagios questions for you all, I appreciate any
> feedback you can provide.
>
>
> 1) I don't think I'm restarting Nagios correctly whenever I make a
> change in a one of the configuration files.  I'm using
> /usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg as well
> as /etc/rc.d/init.d/nagios reload, restart, stop, start ,etc.  It does
> say it restarts Nagios, however it doesn't seem to be using the 'new'
> scripts when I've made changes in them.  For example I just changed the
> E-mail address and did those commands above, and it's still sending
> Email to my old address.  Does this have something to do with me
> commenting out the pre caching options maybe?
>
> 2) For my notifications, I'm not seeing anything in the body of the
> message.  All I see is the Message name "** PROBLEM Host Alert: CORP-NSS
> is DOWN **".  I'm pretty sure there should be more information in the
> body.. any ideas?
>
> 3) I've seen a couple plugins on a few sites I might want to check out,
> how do I go about installing them?  I didn't find any documentation for
> installing them..
>
> 4) I'm looking for more ways to monitor our Routers and Switches here.
> Currently all I have is service checks of 'Ping Test' and 'System
> Uptime'.  I also saw on the quickstart guide the following service
> check, but I'm seeing errors.  The IP address there looks wrong, and
> it's saying it can't find a log.
>
> define service{
>        use                     generic-service
>        hostgroup_name  switches
>        service_description     Check Local Traffic
>        check_command
> check_local_mrtgtraf!/var/lib/mrtg/192.168.1.253_1.log!AVG!1000000,20000
> 00!5000000,5000000!10
> }
>
> 5) What other service checks do people use to monitor their switches and
> routers?  We have SNMP enabled on them and want to collect more
> information through Nagios.
>
> Thanks for the help!!
>
>
>
>
>
>
>
> ------------------------------------------------------------------------------
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Come build with us! The BlackBerry(R) Developer Conference in SF, CA
is the only developer event you need to attend this year. Jumpstart your
developing skills, take BlackBerry mobile applications to market and stay 
ahead of the curve. Join us from November 9 - 12, 2009. Register now!
http://p.sf.net/sfu/devconference
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