Translations:ReleaseNotes/Juno/21/en


 * Extensible Resource Tracking. The set of resources tracked by nova is hard coded, this change makes that extensible, which will allow plug-ins to track new types of resources for scheduling. launchpad specification
 * Allow a host to be evacuated, but with the scheduler selecting destination hosts for the instances moved. launchpad specification
 * Add support for host aggregates to scheduler filters. launchpad: disk; instances; and IO ops specification