switching between servers

OK guys,
I have two servers, SOLID and LIQUID both configured, up and working with
XAMPP, running Apache.
SOLID has public IP while LIQUID is so far under the subnet.

The thing is that I want to switch all WWW traffic temporarily to LIQUID.
Is there a professional way of doing this (In matter of few seconds) so that
my costumers on WWW server wont get error notices?

This would be super cool if its possible.

Best regards,
Mr.Jason

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Mr.Jason wrote:
> OK guys,
> I have two servers, SOLID and LIQUID both configured, up and working with
> XAMPP, running Apache.
> SOLID has public IP while LIQUID is so far under the subnet.
>
> The thing is that I want to switch all WWW traffic temporarily to LIQUID.
> Is there a professional way of doing this (In matter of few seconds) so that
> my costumers on WWW server wont get error notices?
>
> This would be super cool if its possible.
>
> Best regards,
> Mr.Jason
>

If I understand correctly what you're asking, you're trying to do a
fail-over to a "hot" standby system. This is quite easy to do, using
the High-Availability Linux project (Linux-HA). Here's their project site:

http://www.linux-ha.org/

The basic idea is that you run a heartbeat daemon on both machines, and
when your standby machine stops receiving these heartbeats from the
production server, the standby machine takes over (it can switch its IP
address, hostname, and other details to mimic the production server).
This can all happen within a few moments.

Good luck,
-Ryan Twomey
--
www.dracoware.com - Serious server monitoring software.