Cloned from launchpad blueprint https://blueprints.launchpad.net/nova/+spec/libvirt-exists-support. Description: the .exists event is an end-of-day notification that an instance is active. It is currently only supported with the Xen virt driver. Libvirt needs this as well. Specification URL (additional information): None
Xen is not formally supported in RHELOSP at this time.