I’m sure newcomers to high availability on Linux are still being bewildered by reams of readily googlable semi-ancient information floating out there in the ether.  So I’m going to try to help remedy this by saying:

• It’s presently June 2012.
• Go read Ahead of the Pack: the Pacemaker High-Availability Stack.
• Now you know what all the pieces are and how they fit together 😉

This has been a public service announcement.  Thank you for reading.