Regarding Alert History.

[Marc Powell]

On Dec 8, 2008, at 12:42 AM, Gaurav Ghimire wrote:

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> Dear all,
>
> I wanna know more about the Nagios Alert History. What does it log?  
> Is it only that it logs the downtimes and their corresponding  
> uptimes? OR it

Typically only state changes since that's primarily what the CGI's  
report on. You have some control over the logging of additional  
information for your own purposes by changing the log_* values in  
nagios.cfg.

> The case is in my nagios installation. I can see only the history  
> for today. Once I try to see the same for the earlier days. It says  
> that no information was found in the log files. And I think that  
> this mustn't be the case.I should be seeing any information  
> collected for the host in the period of time.

Is log_rotation_method in nagios.cfg set to 'd' (daily)? Current logs  
(based on the value of log_rotation_method) are in /usr/local/nagios/ 
var/nagios.log. Historical logs are in /usr/local/nagios/var/ 
archives/, one per log_rotation_method interval. Nagios automatically  
rotates them there and they, and the directory they are in, should be  
readable by your web server. They are simple text files so you could  
easily examine them to verify that what you're looking for exists in  
them.

Be aware that depending on the version of nagios you are using, it  
will log usually only when a host or service changes state. If the  
host you are searching for has not changed state during your reporting  
window you'll need to use the backtracked archives setting to include  
a time period when it did or set the first assumed state to give  
nagios a starting state for the host.

--
Marc

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