Check_MK is an open source software application for system and network monitoring. It is built on top of the Nagios monitoring system and is designed to provide a comprehensive and reliable monitoring solution for networks and systems. Check_MK provides users with a powerful and easy-to-use web interface that enables them to monitor their systems and networks. This interface allows users to create custom checks and monitor performance metrics, as well as define thresholds for alerting. Additionally, Check_MK offers a wide range of features such as service discovery, auto-discovery of services, distributed monitoring, graphing, alerting and more. Check_MK is an ideal monitoring solution for small to large scale networks and systems.
Difficult to maintain. Not enough APIs. High learning curve. Check_MK outperforms all of these.