This document discusses managed cloud services based on open-source technologies. It notes that open-source solutions like OpenStack provide infrastructure as a service with resources for compute, storage, and networking that provide scalability. Integrating OpenStack with OpenDaylight allows for visual network topology representation and policy-based traffic steering. Choosing an OpenStack cloud avoids vendor lock-in, allows choosing your own datacenter and design, and offers reduced and pay-as-you-grow costs. RIHUCloud provides a fully cloud-based enterprise platform with standard OpenStack distributions, seamless upgrades, rapid production deployment, and full support for OpenStack and underlying virtual infrastructure.