This document summarizes two OpenStack container projects - Magnum and Zun. Magnum provides an API to manage container infrastructure by leveraging Heat, Nova, and Neutron to provision container orchestration engines like Kubernetes and Docker Swarm. Zun provides a container service with APIs for launching and managing containers across different technologies in an integrated manner with OpenStack services like Keystone, Nova, Neutron, Glance, and Cinder. The document compares the two projects and suggests using Magnum when wanting OpenStack to provide infrastructure for self-managed containers, and using Zun when wanting OpenStack to provision and manage containers directly.