Andrew Latham

Clean installs directly from the repos...

Using libvirt (virsh/virt-install/virt-manager) you can install from the HTTP repo of a Linux distribution to be super lazy. During installation you simply provide the URI in the location field or tools like virt-manager will have an option in the wizard.

For Debian you would use:

http://deb.debian.org/debian/dists/stable/main/installer-amd64/

For CentOS which lacks a CDN mirror or I could not find it quickly, you can try:

http://mirrors.kernel.org/centos/7/os/x86_64/