Ubuntu Server from Scratch

[kendel]

Morning,
I have 4 Computer nodes all running a base install of Ubuntu Server x64

I wish to start hosting websites and want to isntall LAMP (Linux+Apache+MySQL+PHP4) and Mail.
I will also be using one of the nodes as a file server.
I will use Webmin as my administration.

Node 1: Apache+PHP4, phpMyadmin, Webmin
Node 2:
Node 3:
Node 4: BIND9, Webmin

I will upgrade later as I go along, maybe add new nodes.


As listed above what should be installed on each of my server to accomplish this goal?
I might *** a 5th Node for my file server.

------------------------------------------------------------
Background:
I attempted to so HA+Hearbeat with 2 Nodes and then the other 2 Nodes were Apache webservers. (I was using a howto guide). That worked but it seems like overkill and too much. So I am now looking for recommendations, should I have continued that route or is that a faster cheaper solution...

[linuxaria]

It depend on what do you want to get.
It's acceptable to have a downtime of 1 minute, 1 hour or 1 day (or more)?

A good solution (overkill ?) could be

Ha cluster:

Node 1 - Heartbeat + LVS (active) + mysql (passive)
Node 2 - Heartbeat + LVS (Passive) + mysql (active)

Keep the data you need in sync (mysql informations) with DRBD
Alternative, Use mysql replication

Farm :

Node 3 - Apache + php
Node 4 - Apache + php

This is a cheap solution to have an environment with a nice uptime

[kendel]

Its whatever gives me a complete LAMP + mail + FTP + Fileserver result... so do you recommend I continue to HAProxy solution?

[linuxaria]

Ha solution + farm is the best to avoid headcache of having 1 server down and stopping all for that, so yes in general i like to use HA and/or service in farm

[kendel]

thank you for the advise