From ImageStream Router Documentation
- Nagios monitors target systems for system load, resource availability, and anything else which can be quantified numerically. Upon discovering a warning state, it sends notifications out via a highly configurable alert mechanism. Configuration is usually found in /etc/nagios/ with various portions of the configuration broken down into specific files. My reference mrtg configuration file configures Nagios to watch CPU temperature and load, BGP peer state, ssh availability, and ping time to the router. The Nagios Documentation covers initial setup and configuration in significantly more detail then covered here.
use local-service ; Name of service template to use
service_description SSH service