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I'm considering deploying LVS on our web clusters (in my not so copious
free time!), and would appreciate some thoughts on the following:

A typical web cluster for us would look something like this:

LVSdirector--------------+---------------real server----------------\
| 192.168.0.98 | 192.168.0.99 212.187.214.99 |
212.187.214.97| | |
| +---------------real server---------------\|
| | 192.168.0.100 212.187.214.100 ||
| | ||
| +---------------real server--------------\||
| | 192.168.0.101 212.187.214.101 |||
| | |||
| +---------------real server-------------\|||
| 192.168.0.102 212.187.214.102||||
| ||||
\--------------------------------------------------------\||||
|||||
switch
|
/
Internet_____________router_______/

Director using DR, of course. I THINK I have this setup right?

Now, our problem is that we have several of these clusters, which are
geographically widely separated. We're doing some measure of DNS-based
providing of the 'nearest' cluster for a given user, but it isn't necessarily
true that a given cluster can handle all its potential traffic.

Does anyone have any ideas on ways of setting up a director to go
"um, I can't handle any more web connections, why don't you try THIS cluster
instead"?
--
Mike Whitaker | Work: +44 1733 766619 | Work: mike@cricinfo.com
System Architect | Fax: +44 1733 348287 | Home: mike@altrion.org
CricInfo Ltd | GSM: +44 7971 977375 | Web: http://www.cricinfo.com/