Geographically separated load balancers?

[Joseph Mack NA3T]

On Mon, 20 Nov 2006, Neil Aggarwal wrote:

> Joe:
>
> I am thinking there will be two physical machines.
> Each machine will run a director and a real server.
>
> Are there any docs on how to set up the VIP and
> routing for this scenario?

I assume you have two machines, each being a director and 
realserver. It's Horms two machine setup but the machines 
are in different locations, on different networks.

It's a standard setup except that you're going to have to 
handle the routing yourself. If you can't move the VIP 
between locations (each location will have different network 
blocks), then you'll have to failover by changing the DNS 
entries (slow, can take days). So you'll need the two sites 
to cooperate (failover via the routing protocal which will 
take 30secs or so) and both sites will need to be able to 
take the VIP. Failover between different sites uses this (or 
similar mechanisms) and is a pretty normal operation.

It's all routing - nothing to do with the LVS layer.

Joe

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Joseph Mack NA3T EME(B,D), FM05lw North Carolina
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