docker is the brains, by talking to the operating system it makes easy to use OS containers (which are analogous to VMs but much cheaper since they are one proc

docker is the brains, by talking to the operating system it makes easy to use OS containers (which are analogous to VMs but much cheaper since they are one process rather than a whole "machine"). Deis is for orchestration. He's the conductor of the orchestra. It's the next level up, for managing how multiple containers get set up and talk to one another.