Installing Nagios
Nagios is an open source monitoring tool that is well known and widely accepted by system administrators. There are other OpenSource options available as well, such as Zabbix or Sensu. We won't be able to get into those here. Just know that they are available and can help your monitoring needs.
There are plans in the works for monitoring installation to be added to a Triple-O deployment. Keep watch on the community for progress that is made on this. For now, we will install Nagios and look at what configurations can be dropped in to monitor an OpenStack installation. Start by installing Nagios, setting it to start on boot and starting the service:
undercloud# sudo yum install nagios nagios-plugins-all nagios-plugins-nrpe -y
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