[Nagiosplug-devel] plugin help

[Ton Voon]

Aditya,

NRPE: Unable to read output usually means that something was written  
to stderr and nothing to stdout when using check_nrpe. You should  
check that you can run your script as the nagios user on the target  
system, then try using check_nrpe from the nagios server as the  
nagios user. Only after these both work can you try from the Nagios  
daemon itself.

I've seen situations where the #! interpreter was not executable by  
the nagios user on the target system would cause this problem.

Ton


On 9 Sep 2005, at 14:49, Aditya Ivaturi wrote:

>
> Well the if condition is not the problem I think, because when I  
> execute it on command line I get exactly the result I was  
> expecting. For e.g. this is one of the outputs:
>
> OK: 12 Users Online | UsersOnline=12;0;0;
>
> Where in fact there were only 12 users users using that system at  
> that point. As far as permissions are concerned, I checked them and  
> they all seem to be fine - owned by nagios and 755.
>
> --Turi
>
> Lynne.G.Lawrence at uscg.mil wrote on 09/09/2005 08:35:36 AM:
>
> > Perhaps your initial if statement is failing?  I suggest that you
> > add an else{} clause to the initial if{} regex match; put out some
> > message and exit $ERRORS{UNKNOWN} for no match.  Other than that,
> > maybe check the file permissions to ensure that it is executable by
> > the nagios user.
> >
> > Hope this helps,
> >
> > Lynne Lawrence
> > QSS/USCG
> >
> > From: nagiosplug-devel-admin at lists.sourceforge.net [mailto:
> > nagiosplug-devel-admin at lists.sourceforge.net] On Behalf Of Aditya  
> Ivaturi
> > Sent: Thursday, September 08, 2005 5:08 PM
> > To: nagiosplug-devel at lists.sourceforge.net
> > Subject: [Nagiosplug-devel] plugin help
>
> >
> > This is the first time I am trying to write a plugin for Nagios. So
> > please bear with me. We have an online testing system and I am
> > writing a plugin to check how many users are actually taking a test.
> > It is a module that is in built in the system and exported via http.
> > So all I do is call that page and dump the number out. Nothing
> > complicated. The code-block (perl) which dumps out is as follows:
> >
> >
> > if ($content =~ m/<TD>Student Cache<\/TD><TD>(\d*)<\/TD>/) {
> >     if ($1>$critical) {
> >         if ($verbose) {
> >             print "CRITICAL: $1 Users Online > $critical Critical
> > Status \t Critical ErrorLev 2 | UsersOnline=$1;0;0;\n";
> >         }
> >         else {
> >             print "CRITICAL: $1 Users Online | UsersOnline=$1;0;0; 
> \n";
> >         }
> >         exit $ERRORS{'CRITICAL'};
> >     }
> >     elsif ($1>$warning) {
> >         if ($verbose) {
> >             print "WARNING: $1 # Users Online > $warning Warning
> > Status \t Critical ErrorLev 1 | UsersOnline=$1;0;0;\n";
> >         }
> >         else {
> >             print "WARNING: $1 Users Online | UsersOnline=$1;0;0; 
> \n";};
> >         exit $ERRORS{'WARNING'};
> >     }
> >     else {
> >         if ($verbose) {
> >             print "OK: $1 Users Online - Status normal \t Normal
> > ErrorLev 0 | UsersOnline=$1;0;0;\n";
> >         }
> >         else {
> >             print "OK: $1 Users Online | UsersOnline=$1;0;0;\n";
> >         }
> >         exit $ERRORS{'OK'};
> >     }
> > }
> >
> >
> > For e.g the output will look like:
> >
> > OK: 12 Users Online | UsersOnline=12;0;0;
> >
> > where -w is 150 and -c is 200. But nagios complains by saying "NRPE:
> > Unable to read output". Is the format of the output wrong or am I
> > missing any steps?
> >
> > --Turi
> >
> >
>
>
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