Published April 22nd, 2003 by Jim O'Halloran
Simple IP Take Over
ONLamp shows us a nice simple simple IP takeover scheme, for use with Round Robin DNS’ed servers, allowing one server to assume the identity of a failed server.
Directing traffic to one of several machines is fairly straightforward when using round-robin DNS. But what happens when one of those servers becomes unavailable? Here’s one scheme for monitoring the health of another server, and standing in for it if it fails.