NRPE Customize configure

[Kevin.c]

Hi,
could you update me , how I can customize configure the threshold warning and critical set up in XI ?
I follow the document change the $ARG2$ -a 1 2 , but not working , and I also try to change the nrpe.cfg , also did not work, any other things I need to do , please guide me
thank you !

[lmiltchev]

First off, how did you install the Linux agent (NRPE + Nagios plugins) on the client? Did you use our official installer?
https://assets.nagios.com/downloads/nag ... _Agent.pdf

Can you show us how your command is defined on the client (remote machine)?

Example:

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command[check_users]=/usr/local/nagios/libexec/check_users $ARG1$

Hint: The command may be defined in the nrpe.cfg or common.cfg (if exists), depending on how you installed NRPE. Please check both files.

Can you show us how your service is defined on the Nagios XI server?

Example:

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define service {
	host_name			CentOS6-NRPE
	service_description		Users
	use				xiwizard_nrpe_service
	check_command			check_nrpe!check_users!-a '-w 1 -c 2'
	max_check_attempts		5
	check_interval			5
	retry_interval			1
	check_period			xi_timeperiod_24x7
	notification_interval		60
	notification_period		xi_timeperiod_24x7
	notifications_enabled		1
	contacts			nagiosadmin
	_xiwizard			linux-server
	register			1
	}

Can you test your command from the command line, and show the output?

Example:

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/usr/local/nagios/libexec/check_nrpe -H 192.168.x.x -c check_users -a '-w 1 -c 2'
USERS OK - 1 users currently logged in |users=1;5;10;0

[Kevin.c]

$USER1$/check_nrpe -H $HOSTADDRESS$ -t 120 -c $ARG1$ $ARG2$

[Kevin.c]

Please take a look this two config file , is that correct for to to configure ? please see the alert picture , how can I deal with it !


actually I want do this from nrpe

Check_users -> Check_users -w 150 -c 200
Check_total_procs -> check_procs -w 750 -c 850

A little experiment with filesystems:

Check_hda1 -> check_tmp -> check_disk -w 20% -c 10% /tmp

Check_devopn1 -> check_disk -w 20% -c 10% /devopn1

could you guide me to do this ?
thank u !

[tgriep]

The copy of the NRPE Agent you have installed on that server has all of the arguments hard coded and they need to be changed to allow arguments to be passed to it.

You would have to comment out the following hard coded commands in the nrpe.cfg file

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command[check_users]=/usr/local/nagios/libexec/check_users -w 150 -c 200
command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20
command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /tmp
command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 750 -c 850 -s Z
command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 750 -c 850
command[check_hda2]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /devopn1

Then this option has to be changed from

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dont_blame_nrpe=0

to

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dont_blame_nrpe=1

This will enable the NRPE agent to receive arguments from the Nagios XI server.

Then add this section to the bottom to the nrpe.cfg file

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### GENERIC SERVICES ###
command[check_init_service]=sudo /usr/local/nagios/libexec/check_init_service $ARG1$
command[check_services]=/usr/local/nagios/libexec/check_services -p $ARG1$

### MISC SYSTEM METRICS ###
command[check_users]=/usr/local/nagios/libexec/check_users $ARG1$
command[check_load]=/usr/local/nagios/libexec/check_load $ARG1$
command[check_swap]=/usr/local/nagios/libexec/check_swap $ARG1$
command[check_cpu_stats]=/usr/local/nagios/libexec/check_cpu_stats.sh $ARG1$
command[check_mem]=/usr/local/nagios/libexec/custom_check_mem -n $ARG1$

### SYSTEM UPDATES ###
command[check_yum]=/usr/local/nagios/libexec/check_yum
command[check_apt]=/usr/local/nagios/libexec/check_apt

### DISK ###
command[check_disk]=/usr/local/nagios/libexec/check_disk $ARG1$
command[check_ide_smart]=/usr/local/nagios/libexec/check_ide_smart $ARG1$

### PROCESSES ###
command[check_all_procs]=/usr/local/nagios/libexec/custom_check_procs
command[check_procs]=/usr/local/nagios/libexec/check_procs $ARG1$

### OPEN FILES ###
command[check_open_files]=/usr/local/nagios/libexec/check_open_files.pl $ARG1$

### NETWORK CONNECTIONS ###
command[check_netstat]=/usr/local/nagios/libexec/check_netstat.pl -p $ARG1$ $ARG2$

Save the nrpe.cfg file and restart the nrpe agent on your remote system.

The new commands are setup to receive the arguments from the XI server.

To fix the devopn1 folder error in XI, you will have to edit the "devopn1 folder" service and change $ARG1$ from

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check_hda2

to

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check_disk

Save and apply the config.

Hopefully that will fix the issues for you.

If you do not want to do all of the editing of the NRPE agent, you can uninstall it and use the Linux Agent installer at this link which will setup the server for you.
https://assets.nagios.com/downloads/nag ... _Agent.pdf

[Kevin.c]

thank you for fast reaction, I will do this as you guide !

[tgriep]

OK, if you have any other questions, let us know.

[Kevin.c]

hi , looks there still have problem with the folder check

can you tell me how we can check the Linux folder with nrpe , is that right use

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check_disk

,but when I use it for different folder got same size, I think it is not correct . please guide me to fix this issue .

thank you !

[tgriep]

The check_disk command is used for getting the free space for the whole drive. If those folder are on the same drive, then the output for the checks will show the came info.
What you are looking for is a check that only shows the used space in that folder, you would have to use a different plugin.
Take a look at the plugins below for some example plugins you can use
https://exchange.nagios.org/directory/P ... e)/details
https://exchange.nagios.org/directory/P ... ze/details

[Kevin.c]

could you guide me how to use this plugin for monitoring a folder
do we need add something in nrpe.cfg , what is the command in nagios xi ?

thank you !