[the_real_bto]

I've been playing around with docker, so I will lend my two cents. If kvm gold images work for you, then by all means use them!

What I like about docker: The layered filesystem [0] is easy to work with and seems pretty smart. I can easily tweak an image, push it to docker hub and pull it back down. Only the delta is being pushed and pulled, not the whole filesystem. This seems like a pretty big win to me! Your db server and redis instance can share the same base system image. This makes updates and redeploying the images much faster!

Also the containers are much lighter weight to run than a vm. You don't need a beefy machine to run a few containers. I'm under the impression that one can run 20-30 containers on a modern laptop, but haven't verified this for myself.

[0] http://docs.docker.com/terms/layer/