Out of curiosity: Taming the beast, Vyatta 6.6 HA cluster
Mon May 25 13:05:45 2015 - permalink - - http://empujapalla.blogspot.hu/2014/04/taming-beast-vyatta-66-ha-cluster.html

Keepalived for Linux
Mon Nov 8 20:37:06 2010 - permalink - - http://www.keepalived.org/documentation.html