Nagios Support Forum

Hi,

We are unable to start nrpe on Linux server which is a client machine.

OS on client machine is RHEL 7.4


[root@host1 ~]# service nrpe start
Redirecting to /bin/systemctl start nrpe.service
[root@host1 ~]# /bin/systemctl start nrpe.service
[root@host1 ~]# service nrpe status
Redirecting to /bin/systemctl status nrpe.service
● nrpe.service - Nagios Remote Program Executor
Loaded: loaded (/usr/lib/systemd/system/nrpe.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Fri 2020-08-07 19:59:20 AEST; 5s ago
Docs: http://www.nagios.org/documentation
Process: 9982 ExecStopPost=/bin/rm -f /var/run/nrpe/nrpe.pid (code=exited, status=0/SUCCESS)
Process: 9980 ExecStart=/usr/sbin/nrpe -c /etc/nagios/nrpe.cfg -f $NRPE_SSL_OPT (code=exited, status=2)
Main PID: 9980 (code=exited, status=2)

Aug 07 19:59:20 host1 systemd[1]: Started Nagios Remote Program Executor.
Aug 07 19:59:20 host1 systemd[1]: Starting Nagios Remote Program Executor...
Aug 07 19:59:20 host1 nrpe[9980]: Starting up daemon
Aug 07 19:59:20 host1 systemd[1]: nrpe.service: main process exited, code=exited, status=2/INVALIDARGUMENT
Aug 07 19:59:20 host1 systemd[1]: Unit nrpe.service entered failed state.
Aug 07 19:59:20 host1 systemd[1]: nrpe.service failed.


No output returned when we type the following command.

[root@host1 ~]# netstat -an|grep 5666
[root@host1 ~]#


It seems port 5666 is not open. Could this be one of the reasons for not able to start nrpe.

The status shows invalid argument so chances are the nrpe config has something wrong in it.

Aug 07 19:59:20 host1 systemd[1]: nrpe.service: main process exited, code=exited, status=2/INVALIDARGUMENT

Earlier it used to run.

Attached nrpe.cfg file. Please look into it and let me know what is the error.

Nothing jumps out at me. Do you hHAASHV0x75eb1a cany files in the include dir?

include_dir=/etc/nagios/nrpe.d/

A closer look at the status output shows it's an SSL option that it doesn't like. You might have a close look at those.

Is $NRPE_SSL_OPT defined? Maybe try echoing it from the shell.

echo $NRPE_SSL_OPT

Process: 9980 ExecStart=/usr/sbin/nrpe -c /etc/nagios/nrpe.cfg -f $NRPE_SSL_OPT (code=exited, status=2)

Thanks for the help. This issue is resolved.