Docker Machine is a tool for provisioning and managing your Dockerized hosts (hosts with Docker Engine on them). Typically, you install Docker Machine on your local system.
Docker Machine has its own command line client
docker-machineand the Docker Engine client,
You can use Machine to install Docker Engine on one or more virtual systems. These virtual systems can be local (as when you use Machine to install and run Docker Engine in VirtualBox on Mac or Windows) or remote (as when you use Machine to provision Dockerized hosts on cloud providers). The Dockerized hosts themselves can be thought of, and are sometimes referred to as, managed “machines”.
Are "dockerized hosts" always virtual machines, not actual machines?
Is Docker Machine (
docker-machine) only used when dockerd is running in virtual machines but not in actual machines?