Configuration comes from the environment. We store the configuration per cluster in a centralized store (C*, etcd, SimpleDB). We bake images that contain everyt

Configuration comes from the environment. We store the configuration per cluster in a centralized store (C*, etcd, SimpleDB). We bake images that contain everything else. Depending on the customer and the tech involved we'll do blue-green by doing a controlled rolling push of the config or image after it makes it through the dev/test cycle. Also depending on the type of tech we'll store actual data on network or host volumes.