http fail over with srv records

[Niall O'Reilly]

On 10 Jan 2008, at 21:24, Chris Buxton wrote:

> Note that if the
> web server process fails, but the server machine is still up, you're
> out of luck here.

	Somewhere (just out of my reach at the moment) there's a white
	paper on anycast DNS which suggests how to use failure of an
	advertised service as a trigger to change the advertising
	process.  Google may be your friend.

	In the case considered, a change in routing advertisements is
	required whenever the anycast instance fails, and the two are
	coupled in the startup script for the DNS.

	In your case, a change in DNS advertisement is needed
	whenever the web server instance fails.  Similar coupling
	in the startup script might be an effective way to do this.


	Best regards,

	Niall O'Reilly
	University College Dublin IT Services

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