In my previous post, I talked about how networking was a large part of the discussion at the oVirt Kickoff Workshop. Increasingly, the network is elevating itself to be a first-class citizen in large open source infrastructure and cloud projects, including open source projects like OpenStack and now oVirt. In OpenStack, the Quantum project is the result of these discussions. Newborn community projects such as oVirt are starting to look at elevating the network to provide advanced functionality as well. It was no surprise a large portion of the last day of the workshop was spent on networking, with an early focus on Quantum.
The last day of the workshop started out the morning with an overview of SDNs and Quantum by Lew Tucker, CTO of Cloud at Cisco. Lew drew a nice overview of cloud networking on the white board, presenting an app-centric view of cloud and virtual networking. In the cloud network model, apps care only about connectivity to the network, not how that connectivity happens, thus the focus on apps as the center of this world.
After Lew was done, Dan Wendlandt, project lead for Quantum, presented his Quantum slides. This was helpful to level-set everyone at oVirt with regards to Quantum and OpenStack. One of the main pain points with looking at how Quantum can be shared from OpenStack into oVirt has been the difference in the networking models. OpenStack presents a very cloud-centric view of networking, whereas oVirt wants a more datacenter-centric model. Quantum was designed to generally be agnostic to the deployment model, so using it in oVirt should be a matter of fitting it into the architecture.
After Dan was done giving a broad Quantum overview, Ram Durairaj from the Cisco OpenStack team presented on Quantum L3 Services. Currently, Quantum is designed to address the L2 abstraction of the network. Quantum L3 Services are meant to expose L3 concepts such as subnets and gateways into Quantum and the plugins. It would also allow for routing between tenant domains.
Now that the oVirt Kickoff Workshop is over, watching how the networking story with oVirt evolves will be interesting. The success of oVirt will be the result of the community around it, and the ecosystem for third party vendors it creates. With regards to networking in oVirt, the interactions between the Quantum community and the oVirt community have only just begun, and the future looks like a very collaborative affair between the two projects.