Better together: Appliance & Minion
Minions are the "eyes and ears" of OpenNMS. Rather than directly polling locations and devices from the core system, users can deploy Minions to extend the monitoring capabilities of OpenNMS to remote locations or behind private networks. By relying on Minions, you get:
- Greater security. Minions send all monitoring traffic through a single port, rather than maintaining a large set of firewall rules for multiple monitoring protocols. You can operate Minions behind firewalls or a NAT, lowering your attack surface. The Minion helps isolate network communications away from the core, which has direct access to sensitive data and systems.
- IP overlap, made possible. Meridian and Minion, together, help operations monitor networks with overlapping IP spaces. Minions and monitored nodes can be associated with locations defined in Meridian.
- Monitoring continuity: Minions cache and persist the message broker queue to help prevent data loss in the event of connectivity issues.
The Appliance, applied
An OpenNMS Appliance is essentially a "Minion in a box"—easily deployable, configurable, and updatable. Appliances can be deployed virtually—as a VMware-based virtual environment—or as physical hardware.
The Appliance is available now1 as a 1U rack unit or mini form factor (pictured above).