Pacemaker is an Open Source, High Availability resource manager suitable for both small and large clusters.

"The definitive open-source high-availability stack for the Linux platform builds upon the Pacemaker cluster resource manager." -- LINUX Journal, "Ahead of the Pack: the Pacemaker High-Availability Stack"

Features

  • Detection and recovery of machine and application-level failures
  • Supports practically any redundancy configuration
  • Supports both quorate and resource-driven clusters
  • Configurable strategies for dealing with quorum loss (when multiple machines fail)
  • Supports application startup/shutdown ordering, regardless machine(s) the applications are on
  • Supports applications that must/must-not run on the same machine
  • Supports applications which need to be active on multiple machines
  • Supports applications with multiple modes (eg. master/slave)
  • Provably correct response to any failure or cluster state. The cluster's response to any stimuli can be tested offline before the condition exists

Background

Black Duck Open Hub project report for pacemaker

Pacemaker has been around since 2004 and is primarily a collaborative effort between Red Hat and SuSE. However, we also receive considerable help and support from the folks at LinBit and the community in general.

The core Pacemaker team is made up of full-time developers from Australia, the Czech Republic, the USA, and Germany. Contributions to the code or documentation are always welcome.

Pacemaker ships with most modern Linux distributions and has been deployed in many critical environments including Deutsche Flugsicherung GmbH (DFS) which uses Pacemaker to ensure its air traffic control systems are always available.

Currently Andrew Beekhof is the project lead for Pacemaker.