No output returned from plug-in

[Williams, John]

The plugin doesn't fail when run manually:

newton2:/usr/lib/nagios/plugins# sudo -u nagios ./check_nrpe -H DWDEV -c
disks_DWDEV
All filesystems at less than 95% capacity.

It only fails to show output on the webpage.

Thanks

-----Original Message-----
From: Lars Stavholm [mailto:stava at telcotec.se] 
Sent: Tuesday, May 15, 2007 9:52 AM
To: Williams, John
Cc: nagios-users at lists.sourceforge.net
Subject: Re: [Nagios-users] No output returned from plug-in

I ment the failing check plugin,
i.e show us the output from "sudo -u nagios check_...".
/L

Williams, John wrote:
> When running the check I use the following command:
> 
> 
> sudo -u nagios -H nagios -v /etc/nagios/nagios.cfg
> 
> and get the resulting output:
> 
> newton2:/usr/sbin# sudo -u nagios -H nagios -v /etc/nagios/nagios.cfg
> 
> Nagios 1.4
> Copyright (c) 1999-2006 Ethan Galstad (nagios at nagios.org)
> Last Modified: 05-03-2006
> License: GPL
> 
> Reading configuration data...
> 
> Running pre-flight check on configuration data...
> 
> Checking services...
>         Checked 484 services.
> Checking hosts...
>         Checked 151 hosts.
> Checking host groups...
>         Checked 25 host groups.
> Checking contacts...
>         Checked 28 contacts.
> Checking contact groups...
>         Checked 26 contact groups.
> Checking service escalations...
>         Checked 0 service escalations.
> Checking host group escalations...
>         Checked 0 host group escalations.
> Checking service dependencies...
>         Checked 26 service dependencies.
> Checking host escalations...
>         Checked 0 host escalations.
> Checking host dependencies...
>         Checked 95 host dependencies.
> Checking commands...
>         Checked 145 commands.
> Checking time periods...
>         Checked 19 time periods.
> Checking for circular paths between hosts...
> Checking for circular service execution dependencies...
> Checking global event handlers...
> Checking obsessive compulsive service processor command...
> Checking misc settings...
> 
> Total Warnings: 0
> Total Errors:   0
> 
> Things look okay - No serious problems were detected during the
> pre-flight check
> 
> 
> I checked through the archives and the suggestions that I found didn't
> fix the problem. I agree, it's probably a common problem that I am
> having.
> 
> I went back through my install of nagios and checked permissions
> (against the install that is working) of the following:
> 
> /etc/nagios (and sub directories)
> /etc/nagios-plugins
> /usr/share/nagios (and sub directories)
> /usr/lib/nagios (and sub directories)
> /usr/sbin/nagios
> /usr/sbin/nrpe
> 
> I also checked file sizes of the contents in the /etc/nagios directory
> against the working server and they matched. I then went though, line
by
> line, the config files and they matched.
> 
> I added the host names of the client to my /etc/host file (it was
> already in dns) and that didn't help. I did the same thing on the
client
> machine with the server names. Same result.
> 
> For each host defined in my services config file, not everything is
> failing to report back. It seems like a only the checks that would be
> defined in the nrpe.cfg file on the target machine. If it's just a
> straight plugin check, then it appears to work. For example:
> 
> On our netbackup server, the checks for ping and ssh work fine. The
> custom commands for checking tape drive status doesn't. 
> 
> 
> I also ensured that the package list that was installed on the working
> server also matched the problem server.
> 
> Thanks
> -----Original Message-----
> From: Lars Stavholm [mailto:stava at telcotec.se] 
> Sent: Tuesday, May 15, 2007 12:09 AM
> To: Williams, John
> Cc: nagios-users at lists.sourceforge.net
> Subject: Re: [Nagios-users] No output returned from plug-in
> 
> Williams, John wrote:
>> I am having an issue with a new nagios server where some of the
> plugins
>> are showing "No output returned from plugin" on the nagios webpage.
> The
>> check that is running is a command that is defined on the remote host
> in
>> nrpe.cfg.
> 
> This usually indicates permission problems.
> 
>> I looked around the archives and didn't find anything that would fix
> the
>> problem that I am having.
> 
> It's a common enough problem so you should have found something.
> 
>> I am running Debian Linux, Apache2, and Nagios 1.4.
>>
>> Each remote machine is running nrpe and as the user "nagios" I can
>> manually run the check_nrpe -H hostname -c command and it works fine.
>> It's when I am running the command through the webpage that it
doesn't
> work.
> 
> When you run the check manually, do you run it as user "nagios"?
> /Lars
> 
>> The new nagios server is replacing a nagios 1.3 server, which ran
fine
> (
>> the hardware is out of warranty which is why we are replacing it ).
>>
>> Each remote host has the IP address of the new nagios server defined
> in
>> nrpe.cfg and nrpe has been restarted on the remote hosts.
>>
>> Doing a tail -f /var/log/nagios/nagios.log will show the command
being
>> executed, but no reply data.
>>
>> Nagios was installed using the Debian "apt-get", so it was a
>> pre-packaged bundle from Debian.
>>
>> All plugins have been installed.
>>
>> On the backup nagios 1.4 server (I am using linux clustering) all
> checks
>> work fine. I can't find anything different between file ownership,
>> permissions, etc... with the 1.4 server that is working and the 1.4
> server
>> that isn't.
>>
>> All checks are being done on the same subnet, so routing isn't an
> issue.
>> Any help you can give would be greatly appreciated. If you need more
>> info on my config I would be happy to post it.
>>
>> Thanks in advance
>>
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