How to use Nagios plugin?

dwarf007 · 02-19-2005, 09:40 AM

Can i know how to use nagios plugin? What are the common plugin that you all use? I know nagios can be able to check FTP, HTTP, PING, MYSQL,POP,SMTP,etc.

How does all this works? I had treid with PING and thats the only plugin i really know how it works. I am still study the others usage of nagios.

Anyonw knows, please help.

Thank You.....

david_ross · 02-19-2005, 10:09 AM

The plugins are essentially just clients for each of the servers, if they receive the expected response from the server then the check shows up as ok. If there is a problem it will fall into a warning, critical or unknown state.

dwarf007 · 02-21-2005, 06:40 AM

Did anyone of you all write own plugins? Is it hard to write it?

Anyone use SMS notification rather than email notification. It saw from Nagios FAQ and stated we need to use yaps (Yet Another Pager Software). Anyone knows how to use it?

Anyone know please help....
Thank You.....

david_ross · 02-21-2005, 02:46 PM

I've written a few, nothing really worthy of a release but I have one that connects to a gkrellm server to report on sensor information which I just need to clean up a bit. You can write them in any language so you aren't tied to anything in particular.

I also use sms notification but it uses an existing e-mail to sms gateway./

twantrd · 02-25-2005, 08:50 PM

Hi David,

Can you post a simple nagios plugin shell script? I don't quite know the syntax of how these plugins work? I've tried looking online and it doesn't really help much. I need to write a tomcat plugin. Thanks...

-twantrd

david_ross · 02-26-2005, 02:57 PM

The documentation can explain it better than me:
http://nagiosplug.sourceforge.net/de...uidelines.html

Generally you just need to provide an exit status depeding on the service state.

twantrd · 02-27-2005, 02:34 AM

Thanks!

-twantrd

dwarf007 · 03-02-2005, 03:51 AM

Is there any plugin to check VNC server? Do i need to write my own plugin? What programming language should be use to write plugin and is it tough?

Anyone knows, please help...
Thank you...

twantrd · 03-02-2005, 12:16 PM

There is no plugin to check if VNC service is up and running. Why not just use 'check_tcp' and specify the port that your VNC service is listening on? It's an easy check.

-twantrd

dwarf007 · 03-02-2005, 09:50 PM

Thanks, I also just found out the use of check_tcp

dwarf007 · 03-14-2005, 06:08 PM

Guys, is this the correct way to define 'check_swap'

Code:

# 'check_local_swap' command definition
define command{
        command_name    check_swap
        command_line    $USER1$/check_swap -w $ARG1$ -c $ARG2$
        }

In services.cfg, i use the below command,

---------------------------------------------------------------------------------
# Service definition
define service{
use generic-service

host_name DatabaseServer
service_description Check Local Swap
is_volatile 0
check_period 24x7
max_check_attempts 3
normal_check_interval 3
retry_check_interval 1
contact_groups Support-Team
notification_interval 120
notification_period 24x7
notification_options w,u,c,r
check_command check_local_swap!70%!60%
}
-------------------------------------------------------------------------------------------------------

I realize this will only check to my nagios server, even i had define teh host with a different IP in hosts.cfg

Anyone know how to 'check_swap' on particular server? How to define in checkcommands.cfg and service.cfg

Anyone know please help
Thank You.....

twantrd · 03-14-2005, 11:10 PM

Do it through snmp. I think there is a also a plugin toi check swap through samba too.

-twantrd

dwarf007 · 03-17-2005, 06:28 PM

Thanks twantrd, but my question havent been asnswer yet. I need to check all the servers in the network, but i only know how to check on nagios (local) server. Do i need to define anything in checkcommands.cfg?

Anyone knows nagios having plugin to "trace route"?

Thank You for all the help

david_ross · 03-18-2005, 03:07 PM

Take a look at npre:
http://nagios.sourceforge.net/docs/1_0/addons.html#nrpe

I'm not sure what you would want from a traceroute plugin. This is what nagios does with the parent host feature.

twantrd · 03-18-2005, 05:59 PM

Hi Dwarf,

Did you take a look at the documents that nagios provides? It tells you how to check services on different servers. The syntax is there. You should get an idea on how to set it up.

-twantrd