heads up on freshness checking and your check_period

[Anthony.Caetano at t-systems.co.za]

Hi

I have spent upwards of 4 hours trying to get freshness checking working 
in Nagios 2.0b1.  So I am just posting this so it is in the archives.

The nagios documentation says to set for the service you passively monitor
active_checks_enabled           0

The documentation doesn't make mention of the check_period...  I had set 
my check period to none since there would be no checks.  Contrary to the 
docs I set active_checks_enabled to 1 in an attempt to avoid all the "red" 
for disabled services. (This is also recommended by the naplax.sf.net REL 
package which i was using for the passive checks)
active_checks_enabled           1
check_period                    none

No freshness checks were done, ever.

I later saw that the Nagios documentation says to disable active checks. 
So I then had this
active_checks_enabled           0
check_period                    none

No freshness checks were done, ever.

Only after looking at the code did i see in check.c 
                /* see if the time is right... */
 
if(check_time_against_period(current_time,temp_service->check_period)==ERROR)
                        continue;

So basically you MUST set the equivalent of
check_period                    24x7

Otherwise the actual freshness check on that service is aborted.

cheers
-ant
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