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You are much better off tracking changes inside the machine, as git etc. won't work very well with a large binary blob like a VM disk image. To be able to roll back to another state, snapshots are an excellent solution, but they have a performance impact. The best method (IMHO) is to use a configuration management tool (e.g. Puppet) and track the changes ...


2

I'd suggest using a different solution like haproxy, an nginx proxy, or nearly any other actual load balancing method. Usually iptables load balancing is used for outgoing packets on multiple uplinks. If you must balance using iptables, then you need to use a different method. Just every few packets will mangle all your requests. I saw a decent tutorial on ...


1

What you try to do is possible. It is called truck-based replication and only really makes sense if there would be a lot of data to sync from primary to secondary. See http://www.drbd.org/users-guide/s-using-truck-based-replication.html For testing purposes I would clone the machine but then create the secondary DRBD device from scratch (or read through the ...



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