Hi,

I've managed to get a few plugins (check_mysql_status.asc, check_mysql_conn.pl, and check_mysql_health-2.1). These are for use in Nagios to check the status of mysql server in my company's local and remote server.

check_mysql_conn.pl : perl script file
check_mysql_status.asc : script that needs to be decrypted
check_mysql_health.pl : perl script file

Now what I need is some help/guide on where to install these plugins for to me able to test/use it.

this depends. is it a remote machine?? which check methods do you use?? eg nrpe/check_by_ssh etc etc

I want to use the nrpe method. For both local and remote server. I want to test and run it in my local server first. Then install and make it run in the remote server.

to run it locally, install the scripts in the main directory that houses all the n agios plugins /usr/local/nagios/libexec or /usr/lib/nagios/plugins/

add a line to commands.cfg for that script...there will be many examples already in the file for you to follow.
and finally define the service....possibly in the hosts.cfg? depends how you have set up.
there are also examples in there to follow.


for nrpe, you need nagios-nrpe running on the remote server and nrpe.cfg configured correctly and started. there are examples in nrpe.cfg
the nagios plugin(s) are then installed in the plugin directory on the remote server(s) and called from the main nagios server.
service needs defining on the server in the hosts.cfg file or wherever you define services.
check_nrpe needs to also be defined in the commands.cfg file.
you can also test this from command line..

./check_nrpe -H hostname -c command -a arguments

ie

./check_nrpe -H remotehost -c checkmysql.pl -a 10 20

I can't locate the commands.cfg and hosts.cfg. I used which commands.cfg and which hosts.cfg to locate these files, but I am returned with :

those config files should be located in your nagios/etc folder. You can also look through your nagios.cfg file and find the directives as to where these files can be located. I believe there is another folder with example files in the nagios root folder. If you followed their guide to compile by source the root installation is normally /usr/local/nagios

Finally located the files...tqs.
An example of a service created in the commands.cfg file :

If I want to use the check_mysql_stats perl script, I've got to create a service in that file :

What do I have to replace for the $USER1$, $HOSTADDRESS$ and $ARG1$?

you dont replace $USER$1. it is already set in resource.cfg.
so hostaddress you replace in the service file, and arg1 whatever it maybe. you can find that out by running the script from the command line and checking out the options/flags it gives.

i am pretty sure for check_snmp you will need more args then you currently have. i know for a fact you will need -C (community string) -o (oid) -w (warn range) -c (critical range) at least