Centos – nagios event handler restart remote service

centosnagios

I Need to use the nagios event handler to restart ntp services.

My restart scripts

1: cat /usr/lib64/nagios/plugins/remote-restart

#!/bin/bash

echo "ok"

/etc/init.d/ntpd restart

echo "done"

2: remote entry for nrpe.cfg

command[check_remote_restart]=/usr/lib64/nagios/plugins/remote-restart

3: run the nagios command from server

/usr/lib64/nagios/plugins/check_nrpe -H $HOSTNAME -p 5666 -c check_remote_restart

output:

ok

done

I am getting the output as in echo but still ntp service is not started.

Can somebody help me to find the soultion .

Best Answer

Unless you're running NRPE as root, you'll need to run that restart command through sudo.

Related Solutions

Nagios NRPE: Unable to read output

Since I see there is no problem with the line you added to /etc/sudoers file:

nagios  ALL=(ALL) NOPASSWD: /usr/lib/nagios/plugins/

I suspect that there is a later entry in /etc/sudoers that override NOPASSWD option and that is reason for http-restart still asking for a password. With your above config, is nagios user a member of sudo group?

Just try to move this line to the end of /etc/sudoers file to exclude this possibility. Also make sure the nrpe user does not need a tty, by setting Defaults:nrpe !requiretty.

UPDATE Wed Jun 27 21:24:21 ICT 2012

To make the NRPE work, you also need to add sudo to your command definition in nrpe.cfg:

command[restart_http]=/usr/bin/sudo /usr/lib/nagios/plugins/http-restart

Linux – Nagios NRPE on Ubuntu 12.04 “Unable to read output”

It seems to me that you don't have the "requiretty" line in your sudoers files, make sure you have the following line there:

Defaults:nagios !requiretty

It's meaning is that nagios user (only) is not required to have a tty to run a command which is why I suspect your command fails.

If you're not sure which user runs nagios you can check it in the configuration file which is usually located in /etc/nagios/nrpe.cfg.

If I had experienced this issue I'd want to first make sure that nagios user is able to successfully run the command and in order to do that I'd enable nagios user's ability to log into the machine by editing it's line in /etc/passwd from:

nagios:x:113:120::/var/lib/nagios:/bin/false

to:

nagios:x:113:120::/var/lib/nagios:/bin/bash

Then, I'd su - nagios to continue my troubleshooting and then, after solving the issue I'd change this line back to /bin/false.

Best Answer

Related Solutions

Nagios NRPE: Unable to read output

Linux – Nagios NRPE on Ubuntu 12.04 “Unable to read output”

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