You need a CentOS box to develop/test?
# make a new folder: <code>mkdir ~/src/centos7 && cd !$~/src/centos7</code>
# <code>vagrant init centos/7</code> will write your Vagrantfile for you
# <code>vagrant up</code> will start (and build) the virtual machine
# <code>vagrant box update</code> will pull in all the updates to the base box
See https://app.vagrantup.com/centos/boxes/7