libvirt: Add Support for live migration with neutron sriov vnic types
This blueprint aims to address a parity gap between instance booted with vnic type normal and an sriov vnic type
by adding support for sriov live migration.
live migration with sriov devices has some limitations.
when the neutron vnic type is macvtap live migration is supported
by qemu nativly as the macvtap layer hids the hardware from the guest
meaning no hardware state has to be migrated.
when using a direct mode (or direct physical) vnic type
the vf is directly attached to the guest. in this mode it is
not possible for qemu to copy the device state.
to address this gap this blueprint suggests using the
the same mechanisium we used to suspend to disk.
on live migration all sriov port in direct mode will be detached
from the guest and reattached on the destination node.
if this is combined with a bond in the guest between the
direct mode port and a macvtap port connectivity will not be lost
but the performace will be reduced to that of macvtap sriov for the duration.
Blueprint information
- Status:
- Complete
- Approver:
- Jay Pipes
- Priority:
- Medium
- Drafter:
- sean mooney
- Direction:
- Approved
- Assignee:
- sean mooney
- Definition:
- Approved
- Series goal:
- Accepted for train
- Implementation:
-
Implemented
- Milestone target:
-
train-1
- Started by
- melanie witt
- Completed by
- sean mooney
Related branches
Related bugs
Sprints
Whiteboard
Gerrit topic: https:/
Addressed by: https:/
Add spec for sriov live migration
Addressed by: https:/
propagate vnic_type and profile on create port bindings
Addressed by: https:/
[DNM] stub out sriov live migration
Addressed by: https:/
add get_pci_
Addressed by: https:/
Add free for claimed, allocated devices
Addressed by: https:/
Add get_instance_
Addressed by: https:/
SR-IOV Live migration indirect port support
Addressed by: https:/
[WIP] libvirt: auto detach/attach sriov ports on migration
Spec has merged, approved for Stein. -- melwitt 20190110
Addressed by: https:/
Libvirt: do not set mac when unplugging macvtap vf
This did not complete in the Stein release so I am deferring to the Train release. Remember to re-propose the spec for Train as necessary: https:/
Addressed by: https:/
forward port sriov live migration spec to train
efried 20190326: reapproving for train
Gerrit topic: https:/
Gerrit topic: https:/
Addressed by: https:/
SR-IOV Live migration indirect port support
Addressed by: https:/
libvirt: auto detach/attach sriov ports on migration
Addressed by: https:/
Cleanup reno live-migration-
