CoreOS share many common packages with Gentoo and additionally has packages that
tremendously aid in cluster provisioning, usage and management. Many of these tools are already in portage (thanks zmedico!). CoreOS-baremetal is another
fine CoreOS tool that would be a great addition to portage::
Is compatible with app-emulation/rkt and dev-db/etcd which are already in portage. Other documents that explain the connection between these CoreOS tools for cluster setup and management:
Ignition is CoreOS latest provisioning tool . Ignition is useful
as a low level system provisioning tool for a variety of platform uses stated here . "ignition" runs before PID-1 start up which allows a wide variety
of additional features  beyond the Cloud-init package currently found in portage .