No output returned from plugin

[Marc Powell]

> -----Original Message-----
> From: nagios-users-admin at lists.sourceforge.net [mailto:nagios-users-
> admin at lists.sourceforge.net] On Behalf Of Olivier Mugabonake
> Sent: Tuesday, April 12, 2005 3:25 AM
> To: Andreas Ericsson
> Cc: nagios-users at lists.sourceforge.net
> Subject: Re: [Nagios-users] No output returned from plugin
> 
> Hello,
> After testing all possible and imaginable ways to use check_nrpe
> command to monitor a remote host, I think that the problem I have is
> not in the way  I use check-rpe  but in my web based interface of
> nagios:
> Indeed, when I use check_nrpe in command line I got the right
> information, but this is not case in my graphical interface.
> This message is permenently written in my nagios home page:
> >>Warning: Monitoring process may not be running!
> Click here for more info.

What more verbose output does it give you when you follow the 'Click
here for more info' link? That would be useful.
 
> When I had a look on the nagios home page, I read that this message
> was sent when there's no free disk space on the partition where nagios
> is intalled.
> However, there's enough disk space on my nagios server.

That's one of many reasons and probably one of the least likely.
 
> Now I would to know if there's a link between the error : nagios may
> not be running (and this is not the case because the real status of
> nagios is "started") and the fact that I can not monitor remote hosts.

The cgi's determine if nagios is running by executing the
nagios_check_command as defined in cgi.cfg. There is more information on
that command in the doccos and the file itself. What happens when you
run that command manually? By default it checks for a running process
and that the status file has been recently updated. If either of those
checks fail it assumes that nagios isn't running properly. You may need
to tweak the arguments to the command to match your ps output or, if
you're using a DB backend, change the command entirely (to
check_nagios_db.pl for example).

--
Marc


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