我对docker swarms完全陌生。我正在学习的书似乎表明在开始之前有六个单独的物理VM或节点。但是，本教程`{https://rominirani.com/docker-swarm-tutorial-b67470cf8872 似乎暗示我可以使用docker-machine创建6个VM。设置码头工人群的正确做法是什么？另外，我尝试创建一个docker-machine并得到以下错误：
PS C:\dev\docker\swarm> docker-machine create --driver hyperv mgr1
Running pre-create checks...
Creating machine...
(mgr1) Copying C:\Users\manag\.docker\machine\cache\boot2docker.iso to C:\Users\manag\.docker\machine\machines\mgr1\boot2docker.iso...
(mgr1) Creating SSH key...
(mgr1) Creating VM...
(mgr1) Using switch "Minikube"
(mgr1) Creating VHD
(mgr1) Starting VM...
Error creating machine: Error in driver during machine creation: exit status 1
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