游标配置中的磁盘大小未知

Question

我已经使用命令vagrant plugin install vagrant-disksize迷惑了插件

pip install psutil

但是在无所事事之后，它显示以下错误：

 Vagrant.configure("2") do |config|
  # The most common configuration options are documented and commented below.
  # For a complete reference, please see the online documentation at
  # https://docs.vagrantup.com.

  # Every Vagrant development environment requires a box. You can search for
  # boxes at https://vagrantcloud.com/search.
  config.vm.box = "gusztavvargadr/windows-server"
  config.disksize.size="30GB"
  config.vm.box.name="windows_server"

该错误的原因是什么