Nagios Reset Availability Report

Nagios generates availability reports for configured services and hosts. Sometimes you need to reset the availability data. This documentation explains for Debian Wheezy how to reset all the nagios availability stuff, to beginn with the availability report from scratch.

Nagios Availability Report

First stop nagios process:

Nagios uses the retention.dat file for storing status, downtime, and comment information. We need to delete this file to reset the availability data:

We need to delete also the nagios archive log files:

After that start nagios, you will see that the availability report for your hosts and services starts from scratch: