Hi Neutron folk! I'd like to give an update on and encourage wide review of my work on a type of network that connects VMs through IP routing instead of through bridging and tunneling at L2. I believe the core Neutron pieces of this are now complete and ready for detailed review and potential merging.
The change at [1] creates and describes a new 'routed' value for provider:network_type. It means that a compute host handles data to/from the relevant TAP interfaces by routing it, and specifically that those TAP interfaces are not bridged. It is the job of a particular mechanism driver and agent implementation to set up the required routing rules, and my team's Calico project [2] is one example of that, although not the only possible example. The DHCP agent needs enhancement to provide DHCP service to routed TAP interfaces, and the change for that is at [3]. A devstack plugin is included in the Calico repository at [4]. Using this it is possible to see 'routed' networking in action, using the Calico mechanism driver and agent, simply by running devstack with the following in local.conf: enable_plugin calico https://github.com/Metaswitch/calico routed Demonstration steps once stack.sh completes are suggested at [5]. [1] https://review.openstack.org/#/c/198439/ [2] http://projectcalico.org/ [3] https://review.openstack.org/#/c/197578/ [4] https://github.com/Metaswitch/calico/tree/routed [5] https://github.com/Metaswitch/calico/blob/routed/devstack/README.rst FYI I also plan to propose a networking-calico project (or continue proposing, given [6]), to contain the Calico mechanism driver and devstack plugin pieces that are currently in [4], so that all of Calico's OpenStack-specific code is under the Neutron big tent. But I believe that can be decoupled from review of the core Neutron changes proposed above. [6] https://review.openstack.org/#/c/194709/ Please do let me know if you have thoughts or comments on this. Many thanks, Neil __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
