Docker on a remote host

docker context create remote --docker "host=ssh://hostname"
docker context use remote

Is the docker daemon running?

If the Docker daemon is not running on the remote host, you might see this error message:

Cannot connect to the Docker daemon at http://docker.example.com. Is the docker daemon running?

The docker.example.com host is of course nonsense. The solution: Start the Docker daemon on the remote host and it should work.