Thanks, after reading the 3.x on passive_checks I get how to configure the
service.
Now, what would be the benefit of having active/passive checks enabled for a
service? Say, it takes <5 minutes for Nagios to process my 80 hosts/600
services, if the service that I am looking to enable passive checks on as well
is checked near the end of the 5 minute mark, wouldn't it get an update much
sooner having passive checks enabled?
That said, NSClient sending the information to Nagios, logically this sounds
like it should work like that, or based off:
check_result_reaper_frequency=5
max_check_result_reaper_time=30
So within a max of 30 seconds, I should be able to see if that service is
UP/DOWN in the Nagios (or the op5 Ninja) interface?
Are passive checks spread out like active checks on say, when Nagios starts?
Basically, I want to have the alerting tight as possible, if I login to my IIS
server and stop the IISADMIN service, I want to be alerted within those 0-30
seconds based on the reaper frequency.
The box that I put Nagios on has enough CPU/RAM and fast enough subsystem I/O
to build this type of configuration, but I want to make sure the logic above is
correct.
Thanks.
From: Ryan C Ash [mailto:ryan.c.ash.l...@statefarm.com]
Sent: June/24/2010 1:08 PM
To: Nagios-Users
Subject: Re: [Nagios-users] NSCA + NSClient
The short answer is yes, the service description you configure on the client
nsca message needs to match that of the service description on your nagios
server. If you want to migrate to a passive check you need to disable active
checks and enable passive ones. You can leave the check command in place and
incorporate freshness checks to force an active check if the passive fail. For
me I don't want to do active if passive fail. I would rather cut a ticket
"service stale". The nagios doc clearly shows how to configure passive
service checks so give it a read.
So you need "my_cpu_check" to be a service description so nagios knows what to
match that incoming nsca message to.
Ash
From: Mirza Dedic [mailto:mi...@oppy.com]
Sent: Thursday, June 24, 2010 2:56 PM
To: 'Nagios-Users'
Subject: [Nagios-users] NSCA + NSClient
Hi,
I have NSCA configured on my Nagios host, and enabled the necessary plugins on
NSClient++ to support NSCA, configure XINETD appropriately inside my NSClient
config I have:
[NSCA Commands]
my_cpu_check=checkCPU warn=80 crit=90 time=20m time=10s time=4
my_mem_check=checkMem MaxWarn=80% MaxCrit=90% ShowAll type=page
This is just for testing, I also have in my nagios.cfg:
accept_passive_service_checks=1
accept_passive_host_checks=1
In my NSClient Log I can see:
2010-06-24 12:48:44: debug:modules\NSCAAgent\NSCAThread.cpp:205: Executing
(from NSCA): my_cpu_check
2010-06-24 12:48:44: debug:NSClient++.cpp:1106: Injecting: checkCPU: warn=80,
crit=90, time=20m, time=10s, time=4
2010-06-24 12:48:44: debug:NSClient++.cpp:1142: Injected Result: OK 'OK CPU
Load ok.'
2010-06-24 12:48:44: debug:NSClient++.cpp:1143: Injected Performance Result:
''20m'=0%;80;90; '10s'=6%;80;90; '4'=0%;80;90; '
2010-06-24 12:48:44: debug:modules\NSCAAgent\NSCAThread.cpp:205: Executing
(from NSCA): my_mem_check
2010-06-24 12:48:44: debug:NSClient++.cpp:1106: Injecting: checkMem:
MaxWarn=80%, MaxCrit=90%, ShowAll, type=page
2010-06-24 12:48:44: debug:NSClient++.cpp:1142: Injected Result: OK 'OK: page
file: 8.82G'
2010-06-24 12:48:44: debug:NSClient++.cpp:1143: Injected Performance Result:
''page file %'=45%;80;90; 'page file'=8.81G;15.6;17.59;0;19.5; '
What I want to know is, until now I have been using active checks, and for some
servers I want to use passive_checks as well, so that the server updates Nagios.
If I have active checks defined within my Nagios installation such as:
define service{
use generic-service
host_name van-mail01
service_description D - Disk Space
check_command check_nt_disk!D!98!99
}
Can I modify this to also read from the passive_check, and what would my [NSCA
Commands] definition look like? Does the first part have to reflect the service
description?
How does the information coming from the NSCA Client get mapped to my
configured checks?
Thank you.
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