Nagios Support Forum

Hello Team,

I am working on monitoring the Mail queue for Linux server.
I have downloaded the postfix mail queue monitoring plugin. Its working fine on the remote server with sudo

[[email protected] plugins]# sudo /usr/lib64/nagios/plugins/check_postfix_queue -w 20 -c 40
Number of queued messages: 6

without sudo if I check I have to use " -f '!MAILER-DAEMON'"

[[email protected] plugins]# ./check_postfix_queue -w 50 -c 100 -f '!MAILER-DAEMON'. Not sure if this result is correct
Number of queued messages: 0

And on Nagios server, with NRPE I am not getting the results

[root@NagiosXI libexec]# ./check_nrpe -H 10.161.232.60 -c check_postfix_queue
NRPE: Command 'check_postfix_queue' not defined

on the webconsole I have entered the command.. Please check whats actually wrong

NRPE is saying the command is not defined because the command likely does not exist in the remote machine's NRPE configuration set. The -c argument for check_nrpe is telling the remote NRPE agent that you wish to call its check_postfix_queue command. The check_postfix_queue command will need to exist in the remote machine's NRPE configuration (usually in /usr/local/nagios/etc/nrpe.cfg). It might look something like this:

even after defining the command on the remote server I am getting attached error.

It looks like your Nagios XI command definition for "check_postfix_queue" has a space after it:
Can you try removing that space from either the Command's "Command Name" or the Service's "Check Command"?

I am getting the results on CLI
But on webconsole, not giving me any result

I checked with Nagios user, I get the result on CLI, But not when I add the service to the host on webconsole.

My service definition -

define service {
host_name xx.xx.xx.xx
service_description PostFix queue monitoring_mailq
check_command check_nrpe!check_postfix_queue!-a w -100 -c 600!!!!!!
initial_state u
max_check_attempts 3
check_interval 5
retry_interval 5
check_period 24x7
notification_period 24x7
notification_options w,c,u,r,f,s,
register 1
}

Can you send us the full contents of your check_postfix_queue script?

Hi,

PFA.. Thanks. i havent used .sh extension on the plugin

Hmm, I haven't been able to reproduce this particular issue using that script.

On my remote machine:
On my XI machine: Though I think the problem is that your Nagios XI configuration isn't lining up with your NRPE configuration. In Nagios XI you have this:
With the $ARG2$ value being -a w -100 -c 600. This doesn't line up with what you have configured in the remote machine's NRPE:
Where no arguments are expected for this command at all. Try revising your check like so:
And see if that gives meaningful output.

cool.. This worked.
Thanks for the help.
Kindly close this case