Nagios reporting no output when there is output

[Jean-Michel Philippon-Nadeau]

Thanks for your reply Tom.
I really appreciate that you take a few minutes of your time to help me 
on this one.

Tom Wlodek wrote:
> You may also check whether you run it by hand as the right user. Common
> mistake is to execute plugins or scripts as one user 9say, root) and
> then nagios executes them as another one (say "nagios"). It works for
> user root but not for user nagios.

The Nagios server does not actively check the disk status of every 
monitored server. Each server has a script in it's crontab that checks 
the disks and sends the status via NCSA to the main Nagios server.

Correct me if I'm wrong, but I do not think the user running the script 
on the monitored host can interfere with how the Nagios server will 
parse the answer. Am I right?


> If I understand correctly nagios sends notifications  regardless whether
> the service is OK or not. Check the "notification criteria" field in
> service configuration file. maybe you've simply told nagios to send msg
> always.
> (But I admit I do not fully understand your problem description here).

Every 30 minutes, the monitored server sends it's disk status (passive 
check) to the central Nagios server. When the output sent or when there 
is no output sent (after an hour or two), Nagios will emit a notice. 
However, in my case, I get a failure notice and a recovery notice every 
hour, as if Nagios would not interpret the output he receives and the 
alert me that it's OK after having parsed it.

The server monitored is an idle server with 85% disk free and it is 
always reporting correct disk usage (confirmed by the logs I sent 
earlier) but still, Nagios tells me there is no output and then tells me 
it's OK. There are a few minutes between the time Nagios receives the 
disk status and the time Nagios sends me the warning.

I hope this is clearer,

Thanks,

-- 
Jean-Michel Philippon-Nadeau
Administrateur système

Centre de Calcul Scientifique
Université de Sherbrooke
http://rqchp.ca

E-Mail: jmphilip at ccs.usherbrooke.ca
Tel:    +1-819-821-8000 ext. 65480

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