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[sean mooney <1972663@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

bug https://bugs.launchpad.net/nova/+bug/1970467 tracks removign the api blocks for operations with vdpa ports that currently work in the code now that they have been tested with real hardware.
(cold migration, resize, shelve and evacuate)

This blueprint proposes completing the feature set by adding support for
interface detach, suspend and hotplug live migrations.

detach currently does not work because we do not parse the source device path form the dev attribute of the source element in the libvirt XML.
https://review.opendev.org/c/openstack/nova/+/841016

suspend does not work because of how suspend currently detaches the vifs
https://review.opendev.org/c/openstack/nova/+/841017

and hotplug live migration simple need vdpa to be added to the list of
passthoug devices that need to be detached
https://review.opendev.org/c/openstack/nova/+/841012

with these 3 small changes we can have feature parity with neutron sriov
direct mode interfaces and enable all VM lifecycle operations.

transparent vdpa live migration is out of scope of this blueprint as
that requires additional feature development in qemu and the kernel.

** Affects: nova
     Importance: Undecided
     Assignee: sean mooney (sean-k-mooney)
         Status: Invalid


** Tags: libvirt live-migration pci

** Changed in: nova
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1972663

Title:
  vpda suspend, detach and hotplug live migrate

Status in OpenStack Compute (nova):
  Invalid

Bug description:
  bug https://bugs.launchpad.net/nova/+bug/1970467 tracks removign the api blocks for operations with vdpa ports that currently work in the code now that they have been tested with real hardware.
  (cold migration, resize, shelve and evacuate)

  This blueprint proposes completing the feature set by adding support
  for interface detach, suspend and hotplug live migrations.

  detach currently does not work because we do not parse the source device path form the dev attribute of the source element in the libvirt XML.
  https://review.opendev.org/c/openstack/nova/+/841016

  suspend does not work because of how suspend currently detaches the vifs
  https://review.opendev.org/c/openstack/nova/+/841017

  and hotplug live migration simple need vdpa to be added to the list of
  passthoug devices that need to be detached
  https://review.opendev.org/c/openstack/nova/+/841012

  with these 3 small changes we can have feature parity with neutron
  sriov direct mode interfaces and enable all VM lifecycle operations.

  transparent vdpa live migration is out of scope of this blueprint as
  that requires additional feature development in qemu and the kernel.

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