> Swarm is an effort by Docker to extend the existing Docker API to make a cluster of machines look like a single Docker API This isn't really true any more; i

> Swarm is an effort by Docker to extend the existing Docker API to make a cluster of machines look like a single Docker API This isn't really true any more; it's a reference to the original version of Swarm. The version of Swarm that came with Docker 1.12 is completely rethought and not constrained in the same way.