[vidarh]

The "run multiple containers on top of an EC2 instance" is interesting because it is a way of exposing a unified interface for EC2, your local VM, and bare hardware. In practice you'd presumably want to pick instance sizes suitable for your app instead, and keep the number of containers per EC2 vm minimal.

Personally, if I get time, I'm tempted to try to PXE boot CoreOS. Even better if I can do it from Ubuntu's "MAAS", as MAAS supports IPMI for powering servers up/down, and remote control management.

MAAS or another hardware provisioning layer + CoreOS + Docker starts to become very interesting.