Nova is getting towards it's final phases of the long term arc to really standardize the API, which includes removing the API extensions facility. This has been a long arc that was started in Atlanta. And has been talked about in a lot of channels, but some interactions this past week made us realize that some folks might not have realized this is happening. So we've now got an over arching spec about how and why we're removing the API extensions facility from Nova, and alternatives that exist for folks - https://specs.openstack.org/openstack/nova-specs/specs/newton/approved/api-no-more-extensions.html This is informative for folks, please take a look if you think this will impact you. -Sean -- Sean Dague http://dague.net