How to use this box with Vagrant:

Vagrant.configure("2") do |config|
  config.vm.box = "yungsang/coreos-alpha"
  config.vm.box_version = "0.9.17"
end
vagrant init yungsang/coreos-alpha \
  --box-version 0.9.17
vagrant up

This version was created almost 10 years ago.

CoreOS Alpha

Cf.) https://github.com/YungSang/coreos-packer/tree/alpha
Cf.) https://github.com/YungSang/coreos-cluster
Cf.) https://github.com/YungSang/docker-attach

For VirtualBox

$ vagrant init yungsang/coreos-alpha
$ vagrant up

For Parallels

This version (379.3.0) is not working properly on Parallels. So it's not released.
But you can still use CoreOS Beta https://vagrantcloud.com/yungsang/coreos .

$ vagrant plugin install vagrant-parallels
$ vagrant init yungsang/coreos-alpha
$ vagrant up --provider parallels
1 provider for this version.
  • virtualbox
    unknown Externally hosted (github.com)