The Corosync Cluster Engine

View project onGitHub


The Corosync Cluster Engine is a Group Communication System with additional features for implementing high availability within applications. The project provides four C Application Programming Interface features:

  • A closed process group communication model with extended virtual synchrony guarantees for creating replicated state machines.
  • A simple availability manager that restarts the application process when it has failed.
  • A configuration and statistics in-memory database that provide the ability to set, retrieve, and receive change notifications of information.
  • A quorum system that notifies applications when quorum is achieved or lost.

Our project is used as a High Availability framework by projects such as Pacemaker and Asterisk.

We are always looking for developers or users interested in clustering or participating in our project.

The project is hosted by GitHub.

Corosync Downloads

Are provided by GitHub releases.


Please see the wiki for more information.

Corosync Quality

Our project relies on a good mix of talented fresh engineering experience coupled experienced engineers to make great quality software. We validate our software using a test suite which runs on each commit of the tree.

Our automated build and test infrastructure is provided by Jenkins