httpd process monitoring on remote linux server

[Beena_Jogin]

Hi,

We are trying for httpd process monitoring on the remote Linux server.

command:

/usr/local/nagios/libexec ./check_nrpe -H <remote host IP> -c check_procs -a httpd

This command is giving the value of total process, and not httpd.
is there any other command. How to make check_procs work with nrpe
Please assist.

[bwallace]

Add the server to Nagios XI using the Linux Server wizard and check the box next to httpd towards the bottom of the 'step 2' page (see screenshot below). When finished with the wizard, you can find the check_command under Core Config Manager > Services > Service Description = Apache Web Server, under the Actions column click 'View Text Config'
the check_command will show up as:
check_nrpe!check_init_service!-a 'httpd'

.

[Beena_Jogin]

Thanks,

I configured this.

But we want to know the total count of httpd process running and if it exceeds a certain value like 50, it should giving warning notification and if it reached 250 it should be critical.

How can this be done?

Can we write a custom service for this?

Thanks,
Beena

[lmiltchev]

Verify that you have the following command defined in the nrpe.cfg or common.cfg file on the client (remote box):

Code: Select all

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

BTW, what is the version of the check_procs plugin that you are currently using?

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/usr/local/nagios/libexec/check_procs -V

Test your check from the command line on the Nagios XI server:

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/usr/local/nagios/libexec/check_nrpe -H <client ip> -c check_procs -a '-a httpd -w 50 -c 250'

If it works as expected, modify your current check or create a new service. Let us know if you have any more questions/issues.

[Beena_Jogin]

Thanks for this. It worked. It is giving me 9 procs.

But in the remote host it shows as 10.

I am wondering if the command

/usr/local/nagios/libexec/check_nrpe -H <client ip> -c check_procs -a '-a httpd -w 50 -c 250'

takes into account Apache web server?

Thanks,
Beena

[WillemDH]

You could give this plugin a try:

https://github.com/willemdh/check_lin_process

I allows you to add min and max for a process and it also returns memory and cpu usage in percentage.

Grtz

[rkennedy]

Thanks @WillemDH!

@Beena_Jogin - can you show us the full output of a ps -ef on the remote machine, and the full input / output of the command running on Nagios? It might be counting using grep.

[lmiltchev]

Thanks for this. It worked. It is giving me 9 procs.

But in the remote host it shows as 10.

I am not sure how this is possible... The "check_nrpe" calls "check_procs" command, which is run locally on the client. Running this command on the client (remote box):

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/usr/local/nagios/libexec/check_procs -a httpd

should give you the same number of processes as this command:

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/usr/local/nagios/libexec/check_nrpe -H <client ip> -c check_procs -a '-a httpd'

ran on the Nagios XI server.

BTW, you can also give Willem's plugin a try to see if it is going to work better.

Let us know if we answered your questions.