[Nagiosplug-help] creating a plugin script

[Gerhard Lausser]

Hi Robert,
 
> NRPE: Unable to read output
i would say, this is correct, because your plugin does not output anything.
Please try 

...
if [ $result -eq 0 ]; then
                echo "CRITICAL - database error"
                exit 2
        else
                echo "OK - database working fine"
                exit 0
fi


What about the result from the mysql call? What happens if the database is
not reachable? You compare $result numerically with 0. If something goes
wrong, then the $result may not be a number, but some error message instead.
Better use the exit code $? of the mysql command.

Greetings from Munich,
Gerhard