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List: nagios-users
Subject: Re: [Nagios-users] NSCA + NSClient
From: Mirza Dedic <mirde () oppy ! com>
Date: 2010-06-24 20:56:24
Message-ID: CF757435B64CD64798912313712C7B325A39BD2F46 () van-mail01 ! vand1 ! oppy ! com
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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@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@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
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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, \
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please notify the sender immediately and delete the original. Any other use of the \
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class=WordSection1><p class=MsoNormal><span \
style='font-family:"Cambria","serif";color:black'>Thanks, after reading the 3.x on \
passive_checks I get how to configure the service.<o:p></o:p></span></p><p \
class=MsoNormal><span \
style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p><p \
class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>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?<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p><p \
class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>That said, \
NSClient sending the information to Nagios, logically this sounds like it should work \
like that, or based off:<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p><p \
class=MsoNormal><span \
style='font-family:"Cambria","serif";color:black'>check_result_reaper_frequency=5<o:p></o:p></span></p><p \
class=MsoNormal><span \
style='font-family:"Cambria","serif";color:black'>max_check_result_reaper_time=30<o:p></o:p></span></p><p \
class=MsoNormal><span \
style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p><p \
class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>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?<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p><p \
class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>Are passive \
checks spread out like active checks on say, when Nagios \
starts?<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p><p \
class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>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.<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p><p \
class=MsoNormal><span style='font-family:"Cambria","serif";color:black'>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.<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-family:"Cambria","serif";color:black'><o:p> </o:p></span></p><p \
class=MsoNormal><span \
style='font-family:"Cambria","serif";color:black'>Thanks.<o:p></o:p></span></p><p \
class=MsoNormal><span \
style='font-family:"Cambria","serif";color:#1F497D'><o:p> </o:p></span></p><div><div \
style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p \
class=MsoNormal><b><span \
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span \
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Ryan C Ash \
[mailto:ryan.c.ash.lu4w@statefarm.com] <br><b>Sent:</b> June/24/2010 1:08 \
PM<br><b>To:</b> Nagios-Users<br><b>Subject:</b> Re: [Nagios-users] NSCA + \
NSClient<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p \
class=MsoNormal><span style='color:#1F497D'>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. <o:p></o:p></span></p><p \
class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p \
class=MsoNormal><span style='color:#1F497D'>So you need “my_cpu_check” to \
be a service description so nagios knows what to match that incoming nsca message \
to. <o:p></o:p></span></p><p class=MsoNormal><span \
style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span \
style='color:#1F497D'>Ash<o:p></o:p></span></p><p class=MsoNormal><span \
style='color:#1F497D'><o:p> </o:p></span></p><div><div \
style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p \
class=MsoNormal><b><span \
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span \
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Mirza Dedic \
[mailto:mirde@oppy.com] <br><b>Sent:</b> Thursday, June 24, 2010 2:56 \
PM<br><b>To:</b> 'Nagios-Users'<br><b>Subject:</b> [Nagios-users] NSCA + \
NSClient<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p \
class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p \
class=MsoNormal>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:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p \
class=MsoNormal>[NSCA Commands]<o:p></o:p></p><p \
class=MsoNormal>my_cpu_check=checkCPU warn=80 crit=90 time=20m time=10s \
time=4<o:p></o:p></p><p class=MsoNormal>my_mem_check=checkMem MaxWarn=80% MaxCrit=90% \
ShowAll type=page<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p \
class=MsoNormal>This is just for testing, I also have in my \
nagios.cfg:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p \
class=MsoNormal>accept_passive_service_checks=1<o:p></o:p></p><p \
class=MsoNormal>accept_passive_host_checks=1<o:p></o:p></p><p \
class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>In my NSClient Log I can \
see:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p \
class=MsoNormal>2010-06-24 12:48:44: debug:modules\NSCAAgent\NSCAThread.cpp:205: \
Executing (from NSCA): my_cpu_check<o:p></o:p></p><p class=MsoNormal>2010-06-24 \
12:48:44: debug:NSClient++.cpp:1106: Injecting: checkCPU: warn=80, crit=90, time=20m, \
time=10s, time=4<o:p></o:p></p><p class=MsoNormal>2010-06-24 12:48:44: \
debug:NSClient++.cpp:1142: Injected Result: OK 'OK CPU Load ok.'<o:p></o:p></p><p \
class=MsoNormal>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; '<o:p></o:p></p><p \
class=MsoNormal>2010-06-24 12:48:44: debug:modules\NSCAAgent\NSCAThread.cpp:205: \
Executing (from NSCA): my_mem_check<o:p></o:p></p><p class=MsoNormal>2010-06-24 \
12:48:44: debug:NSClient++.cpp:1106: Injecting: checkMem: MaxWarn=80%, MaxCrit=90%, \
ShowAll, type=page<o:p></o:p></p><p class=MsoNormal>2010-06-24 12:48:44: \
debug:NSClient++.cpp:1142: Injected Result: OK 'OK: page file: \
8.82G'<o:p></o:p></p><p class=MsoNormal>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; '<o:p></o:p></p><p \
class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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.<o:p></o:p></p><p \
class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>If I have active checks \
defined within my Nagios installation such as:<o:p></o:p></p><p \
class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>define \
service{<o:p></o:p></p><p class=MsoNormal> \
use   \
; \
generic-service<o:p></o:p></p><p \
class=MsoNormal> \
host_name \
van-mail01<o:p></o:p></p><p \
class=MsoNormal> \
service_description \
D - Disk Space<o:p></o:p></p><p \
class=MsoNormal> \
check_command & \
nbsp; \
check_nt_disk!D!98!99<o:p></o:p></p><p class=MsoNormal>}<o:p></o:p></p><p \
class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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? <o:p></o:p></p><p \
class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>How does the information \
coming from the NSCA Client get mapped to my configured checks?<o:p></o:p></p><p \
class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thank \
you.<o:p></o:p></p><pre>The Oppenheimer Group ---- \
CONFIDENTIAL<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>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.<o:p></o:p></pre><pre><o:p> </o:p></pre></div></body></html> <pre>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.
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