Nagios and Cacti
jmoseley at corp.xanadoo.com
jmoseley at corp.xanadoo.com
Wed Apr 8 21:45:42 CEST 2009
I agree with Daniel's post below. We have Nagios and Cacti running on the
same system; Nagios monitors 691 hosts and 1800 services while Cacti is
pulling stats for about the same number of hosts, but something like 3200
data sources. They run on a dual Xeon 2.8 Ghz box with only 2 Gb or RAM
(no swapping going on). Average load is about 1.5 and peaks at 3 about 3-4
times a day.
The key is that mysql operations are on a dedicated box with 15k SCSI
drives and RAID 10.
James Moseley
Daniel Emmanuel
Feinsmith
<daniel at danielemm To
anuelfeinsmith.co "nccomp at gmail.com"
m> <nccomp at gmail.com>
cc
04/08/2009 10:36 Nagios Users
AM <Nagios-users at lists.sourceforge.net
>
Subject
Re: [Nagios-users] Nagios and Cacti
If you move your mysql instance to another server, you can get much better
performance on a nagios/cacti server. Check top while cacti is running a
large install and you will see that mysql is hoarding CPU and memory
resources not leaving much for nagios.
=====================
Daniel Feinsmith
=====================
{sent from iPhone}
On Apr 8, 2009, at 8:03 AM, Andrew Davis <nccomp at gmail.com> wrote:
And just an FYI from my own experience... putting Nagios & Cacti on
the same server has been somewhat problematic for us. We have over
400 network devices between switches, routers, WAPs, etc. We also
have about 300 monitored servers. Initially I had Nagios and Cacti
both on one server with Cacti running via cron every 5 minutes. About
every 5 minutes, my shells would become unresponsive for roughly 30
to 90 seconds. Turning off either Nagios or Cacti resolved the issue.
Running both seems to have hammered the server a bit (4Gb of RAM, 2 x
dual core 2.x Ghz CPUs). We don't integrate Cacti and Nagios,
however. Nagios does both trending and alerts of all servers. Cacti
does trending only of all network devices/ports. Once I moved Cacti
to its own server, all was fine as far as load/latency went.
A. Davis
Email: nccomp at gmail.com
"There is no limit to what a man can accomplish
if he doesn't care who gets the credit." - Ronald Reagan
Marco Tirado wrote:
Hello:
There are a couple of examples in the nagios exchange page of
different approachs for integrating nagios and cacti. You
should check that out.
I believe the synchronization is going to cost you time and
money, a better approach is to use nagios + pnp4naigos (this
generates nice graphs) + check_snmp_int.pl (this for bandwidth
tests). That way you have only one place to place your
configuration. There are tons of other snmp plugins you can
use for other tests (CPU, Memory, etc),
//Marco
On Wed, Apr 8, 2009 at 11:15 AM, Christopher McAtackney <
cristoir at gmail.com> wrote:
Hi all,
I've been looking into making use of Cacti to act as an SNMP
management tool which runs alongside my Nagios instance.
Ideally, what I would like to do is have Cacti monitor
various
SNMP-exposed metrics on my hosts, and then have a service
check in
Nagios which parses Cacti's results (which I believe are RRD
files)
and send alerts etc.
Nagios itself will still be used for running directly checks
for
services running, errors in log files etc.
Does this approach make sense?
One issue that I can think of is the difficulty in keeping
the config
files of Nagios and Cacti synchronised. I was planning on
using Lilac
Platform to act as my Nagios config file management tool, but
how that
is kept in synch with Cacti is a problem. Has anyone ever set
up an
arrangement like this before?
Cheers,
Chris
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