Linux-HA

The Linux-HA (High-Availability Linux) project provides a high-availability (clustering) solution for Linux, FreeBSD, OpenBSD, Solaris and Mac OS X which promotes reliability, availability, and serviceability (RAS).

The project's main software product is Heartbeat, a GPL-licensed portable cluster management program for high-availability clustering. Its most important features are: no fixed maximum number of nodes - Heartbeat can be used to build large clusters as well as very simple ones resource monitoring: resources can be automatically restarted or moved to another node on failure fencing mechanism to remove failed nodes from the cluster sophisticated policy-based resource management, resource inter-dependencies and constraints time-based rules allow for different policies depending on time several resource scripts (for Apache, IBM Db2, Oracle, PostgreSQL etc.) included Graphical user interface (GUI) for configuring, controlling and monitoring resources and nodes