NSCA + NSClient

[Mirza Dedic]

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.lu4w at 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:mirde at 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.

The Oppenheimer Group ---- CONFIDENTIAL



This message is for the designated recipient only and may contain privileged, proprietary, or otherwise private information. If you have received it in error, please notify the sender immediately and delete the original. Any other use of the email by you is prohibited.



The Oppenheimer Group ---- CONFIDENTIAL

This message is for the designated recipient only and may contain privileged, proprietary, or otherwise private information. If you have received it in error, please notify the sender immediately and delete the original. Any other use of the email by you is prohibited.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.monitoring-lists.org/archive/users/attachments/20100624/cbf5fd5d/attachment.html>
-------------- next part --------------
------------------------------------------------------------------------------
ThinkGeek and WIRED's GeekDad team up for the Ultimate 
GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the 
lucky parental unit.  See the prize list and enter to win: 
http://p.sf.net/sfu/thinkgeek-promo
-------------- next part --------------
_______________________________________________
Nagios-users mailing list
Nagios-users at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nagios-users
::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. 
::: Messages without supporting info will risk being sent to /dev/null