Problem description

Want to trydocker swarm, and then found that it needs to build somedocker machine, docker machine is running a real virtual machine, the virtual machine will be embedded with docker Engine (that is, those commands that can be used in docker). When installing docker on windows, both the docker Engine and docker machine will be installed. One confusion is that with docker machine, there is no need for the Docker Engine.

Trial on windows

This is for my use.docker-machine createSome machine created:
. The docker engine itself is just to isolate processes from the network and other resources (namespaces on linux).
In addition, there is a doubt that opening more than one docker machine should also cost resources (more than containers).