Re: [Nagios-devel] I would expect Nagios to return -1, or 3 for "system14;UP;HARD;1;(No output!)"

[Michael A. <na...@mm...>]

lee...@ao... wrote:
>
> I have a most perplexing couple of issues:
> ----  Nagios appears to be returning '1' and this is causing an 
> erroneous system UP notification
> -  seems like is should be returning -1, or 3  = UNKNOWN   which I 
> would assume would not translate to system UP
>
> 0203 0426 05 [1138969565] HOST ALERT: system14;UP;HARD;1;(No output!)
> 0203 0426 05 [1138969565] HOST NOTIFICATION: 
> mtools;system14;UP;host-notify-by-mknotify;(No output!)

To the best of my understanding, the Nagios status is taken directly 
from the /return value/ of the check command. So in your case, it seems 
like the check_ping plugin is not producing any output but still 
returning a status code of 0. I'm not sure if Nagios reads the stderr or 
just stdout; I think it might be just stdout, in which case it might be 
printing diagnosis messages to its error stream. Regardless, the plugin 
output is essentially ignored by Nagios - it's only ever displayed to 
the end user.

Basically, the plugin shouldn't be returning 0 unless the host is up. It 
should also be producing some sort of output.