NRPE unable to read output

[Hari Sekhon]

I know that nrpe works, I run over 100 checks via nrpe, and on this host 
all other nrpe checks work.

I don't know if it's really the sudo in the line because I have another 
line which says

command[check_another_plugin]=sudo /etc/nagios/another_plugin

and this works fine when called via nrpe as such

check_nrpe -H hostname -c check_another_plugin
OK: test ok

If sudo was the problem, I would expect both checks to fail, but the 
other one works fine.

Also, I need to run the check with sudo because this check will not work 
without root privs and my
nrpe runs under the nagios user.

-h

Hari Sekhon



Lane, Jim wrote:
> Hari: I think your problem is with the sudo in the line 
>
> command[check_plugin]=sudo /etc/nagios/check_plugin
>
> Try it as 
>
> command[check_plugin]=/etc/nagios/check_plugin
>
> and see how you get on. I run NRPE plugins as above on my systems and
> they work fine.
>
> HTH
>
> Jim Lane 
>
> -----Original Message-----
> From: nagios-users-bounces at lists.sourceforge.net
> [mailto:nagios-users-bounces at lists.sourceforge.net] On Behalf Of Hari
> Sekhon
> Sent: February 21, 2007 8:04 AM
> To: Nagios Users mailinglist
> Subject: [Nagios-users] NRPE unable to read output
>
> Hi,
>    I'm using NRPE to execute checks on remote hosts and am have problems
>
> with one plugin on just one machine. I have the plugin in the 
> configuration of nrpe and execute
>
> /usr/nagios/libexec/check_nrpe -H hostname -c check_plugin
> NRPE: Unable to read output
>
> The definition of the command call in nrpe.cfg is as follows:
>
> command[check_plugin]=sudo /etc/nagios/check_plugin
>
> and I have the following line in /etc/sudoers:
>
> nagios  ALL=(ALL)  NOPASSWD: /etc/nagios/check_plugin
>
> NRPE is running as the nagios user. When logged in as root I can do
>
> su - nagios
> sudo /etc/nagios/check_plugin
> OK: test passed
>
> so I don't understand why it is saying no output.
>
> I tried changing the nrpe.cfg to have > /tmp/output.log 2>&1 at the end 
> of it but the file /tmp/output.log was not created so I assume that 
> there really was no output when run from the check_nrpe command.
> This works on all my other servers (most of which are Gentoo) and this 
> one is RHEL4. SELinux is disabled. I can execute all other nrpe checks 
> correctly on this server including another one which also uses sudo.
> The difference in Distro is the only thing I can think of but it even 
> works from the command line. I am using nrpe 2.6.
>
> I have racked my brains but can't think of anything else.
>
> Any ideas on this?
>
> -h
>
>   

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