[geeks] Remote Failover

[Sridhar Ayengar]

Anyone have a pointer to where I might find some information about 
configuring a pair of Apache servers and a DNS infrastructure to perform 
remote web server failover?

I'd like it to happen something like:

1.	One of the web servers notices that another is down.

2.	The web server that noticed the error sends a message to the DNS 
server updating the "www" CNAME to remove the downed machine.

3.	The downed machine comes back up and notices that it is no longer in 
the DNS round-robin so it sends a message to the DNS server to add 
itself back into the "www" CNAME.

Of course, I could write code (or even shell scripts) to do all of this, 
but I'd rather not reinvent the wheel if there is a solution already 
available.

Thanks.

Peace...  Sridhar