[NTLUG:Discuss] Web-server Farm - Networking Question

[Stuart Johnston]

Each VM will always have its own IP address.  The question is public vs. 
private.

The public address will be assigned to the proxy server and all external 
DNS and such will point to that.  When you move VMs from one physical 
server to another, the VM can keep its private address.  The proxy will 
still point to that same address and no external changes need to be 
made.  There is no need for the proxy and VM to be on the same physical 
server as long as the addresses are internally routeable.

David Stanaway wrote:
> For your live-migration - that will be MUCH easier if each VM has its 
> own IP. Then you just move the vm config and disk to the other host, and 
> make if necessary a static routing change. No need for making DNS 
> changes with unspecified downtime after the change while it ripples out.
> 
> David Simmons wrote:
>>> Hmmm, maybe the proxy thing is just what you need then.  I see
>> where
>>> you're coming from now.
>> Maybe this'll help:
>>
>>   rock:     
>> me       :hard-place
>>
>>
>>        :^)
>>
>>
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