One of the most powerful features provided by Nagios is the extensibility of defining checks using simple configuration files even for isolated cases. Additionally, plugins are very useful and can be reused. The Nagios community also offers several plugins that could fulfill an OpenStack operator's needs.
An example of integrating ready-to-use Nagios plugins to monitor OpenStack can be found at: https://github.com/cirrax/openstack-nagios-plugins.
Before diving into a simple Nagios check configuration, let's shed some light on how checks could be defined ahead to cover most of the monitoring aspects in our OpenStack production environment. The following table is an example summary for Nagios check plugins for basic OpenStack ...
