coreos/coreos-vagrant — pull request #115 by pguelpa (2014-05-22 00:13:30+00:00)
Title: feat(Vagrantfile): alter configuration to allow use as Docker host vm

turning off guest additions and vboxsf makes this possible, which is taken directly from the default docker host configuration: https://github.com/mitchellh/vagrant/blob/master/plugins/providers/docker/hostmachine/Vagrantfile