Packer scripts for CentOS
Heavily inspired by:
- https://github.com/shiguredo/packer-templates
- https://github.com/TelekomLabs/packer-rhel
- https://github.com/boxcutter/centos
- https://github.com/CentOS/sig-cloud-instance-build
packer build centos-7.2-x86_64.json
qemu-img convert -c -p -f qcow2 -O qcow2 -o cluster_size=2M centos-72-kvm/centos72 centos-72-kvm/centos72.qcow2