I'm ready to install our new proxy (Ubuntu LTS 10.04) and I'd like to set it up so I can recovery it easily and fast in case of any hardware failure. I thought about using esxi and backupping the virtual machine when the configuration is ultimated and use it in case of failure. Is it a good idea? Otherwise I've heard of remastersys... Can it be used to achieve such a result?
I am sorry for being inaccurate:
budget: zero. I'm forced to use a dual core office personal computer (and have a pentium 3 to use in desperate situation as a transparent proxy backup)
maximum downtime: less possible
administrative effort: less possible