Alerting behavior at beginning of timeperiod

[Steven Kreuzer]

I have several processes that are started each morning from cron and  
then run until the early evening and are then killed.

For example, every weekday at 8:00am, a daemon is started and it runs  
until 6:30pm. A timeperiod of this particular process has been created
so between 08:00 and 18:30, nagios uses nrpe to check to make sure the  
process is in the process list and if not, it sends out an alert. For  
the
most part it works exactly as expected with the exception of the alert  
that is thrown in the morning.

I have been getting an alert each day that is timestamped a couple of  
seconds after 8:00am (Today was sent out at 8:00:06)
My guess as to what happens is that at exactly 8am the first check is  
done and the process might not have been fully started, or cron
started it a few seconds after the check is done.

However, I have nagios setup so that normal checks are scheduled to be  
performed every 5 minutes. If a check fails, another check is scheduled
for 1 minute after the first failed check and then if that check  
fails, an alert is sent out.

Nagios appears to be ignoring that. My guess as to what happens is  
that if the first check at the start of a timeperiod fails, it  
immediately sends out a alert. The issue seems to have
gone away after I changed the timeperiod to begin at 8:01am but I  
wanted to pick the brain of the community to see if this is an  
expected behavior or
something I need to look into more closely.

Many Thanks

--
Steven Kreuzer
http://www.exit2shell.com/~skreuzer


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