Pacemaker (software)

Pacemaker is an open-source high availability resource manager software used on computer clusters since 2004. Until about 2007, it was part of the Linux-HA project, then was split out to be its own project.^[3]

Pacemaker

Initial release	2004
Stable release	3.0.0[1]  / 8 January 2025; 4 months ago (8 January 2025)
Repository	github.com/ClusterLabs/pacemaker
Written in	C
Operating system	Cross-platform
Type	Group communication system
License	GNU General Public License Version 2[2]
Website	www.clusterlabs.org/pacemaker/

It implements several APIs for controlling resources, but its preferred API for this purpose is the Open Cluster Framework resource agent API.

Related software

Pacemaker is generally used with Corosync Cluster engine or Linux-HA Heartbeat.

See also

• High-availability cluster
• Red Hat cluster suite