Mal Herring wrote:
Hi Gentoo-Server....
I run a Apache2 webserver and Postfix as per the virtual mailhost
guide...
For resilience I would like to have two gentoo boxes doing these tasks
for load balancing / redundancy - how can this be achieved? Is there a
tool that will allow replication of the config files / mysql stuff to
allow the boxes to basically be a cluster ?
Oh - one more thing, the boxes will sit in different data centres !
Thanks in advance...
That won't actually be all that easy to accomplish...
The most robust solution will always be to set up a THIRD box in front
of those identical servers, which can load balance the traffic and/or
connections to both.
Obviously, this is going to be more difficult to implement when the
servers are physically far apart.
A very good *mail* solution would be to set up Postfix on both boxes for
the same domain, but with different MX proirities - this is a relatively
easy setup.
For apache, you can do part of the loadbalancing yourself, but that will
require both boxes to be available at all times - meaning you don't have
a redundancy in place.
You can implement this via DNS, but you will need flexible access to
your DNS records; with DNS round-robin you would have a certain amount
of redundancy.
Google around, there are plenty of documents available.
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