Nagios Support Forum

Hi!

when I am calling from server /usr/local/nagios/libexec/check_nrpe -H ip address -c myplugin

I am getting NRPE: Unable to read output

I have added in /etc/sudoers file
nagios ALL = NOPASSWD:/usr/local/nagios/libexec/myplugin
and added in nrpe.cfg file
command[myplugin]=sudo /usr/local/nagios/libexec/myplugin

now from server machine /usr/local/nagios/libexec/check_nrpe -H ip address -c myplugin
Again I am getting NRPE: Unable to read output

As a nagios user on client I am running sudo myplugin its giving desired output

What is the problem I am not getting could any one please help me.


Thanks

Are you running NRPE through xinetd or stand-alone? If the second, did you allow it through the firewall? Did you add the server's IP into your allowed_from in your nrpe.cfg?

tmcdonald wrote:Are you running NRPE through xinetd or stand-alone? If the second, did you allow it through the firewall? Did you add the server's IP into your allowed_from in your nrpe.cfg?

Yes I am running NRPE through xinetd ; I am having other plugins there like check_load every one is working fine.

Can you run your script locally on the remote host? If so, run the following command afterwards to check the exit code: Can you post the custom script and the command/service configuration from core?

With nagios login on remote host I am able to rum myplugin only with sudo permission
like sudo myplugin now I am getting desired output without sudo I am getting nothing.
on local machine myplugin is working now command echo $? giving output 0

I have added nagios ALL=(ALL) NOPASSWD: ALL on sudoers file then in nrpe.cfg

command[myplugin]=sudo /usr/local/nagios/libexec/myplugin

Have you restarted nrpe on the remote system since the command name change?

abrist wrote:Have you restarted nrpe on the remote system since the command name change?

Yes I have restarted my nrpe using sudo /etc/init.d/xinetd restrat its sucessfully restarted ,but the problem did not solve.

This error is usually due to path issues, or sudo issues. Lets check the sudoer tty settings: Additionally, lets run the check through nrpe, but from the remote host:

checking these commands on nagios login
cat /etc/sudoers | grep tty
its giving
cat: /etc/sudoers: Permission denied

now running sudo cat /etc/sudoers | grep tty
its giving
Defaults requiretty

on running /usr/local/nagios/libexec/check_nrpe -H remote host ip -c myplugin
its giving.
NRPE: Unable to read output

What plugin are you actually trying to run?