This template generates a CentOS 7.1 vagrant box, VirtualBox VM or VMWare VM.
64-bit 40 GB disk 512 MB memory OpenSSH for vagrant is also installed
Assuming that you already have Packer, VirtualBox, and Vagrant installed, you should be good to clone this repo and go:
$ git clone https://github.com/sq3/packer-centos-71.git
$ cd packer-centos-71/
$ packer build -only=virtualbox-iso template.json
Then you can import the generated box into Vagrant:
$ vagrant box add arch centos-71-virtualbox.box
$ vagrant up
The vagrantfil uses VirtuaBos linked clones (copy-on-write)
v.linked_clone = true