KVM Qemu Openstack - Manage a live migration

Live migrations arent hard to do, but getting some real insights into them isnt super simple

virsh qemu-monitor-command {VMNAME} --pretty '{"execute":"migrate_cancel"}'

Allow Virsh more downtime(If it cant keepup with RAM utilization)

virsh migrate-setmaxdowntime VMNAME 2500

Check migration status

virsh domjobinfo instance-000002ac
Job type: Unbounded
Operation: Outgoing migration
Time elapsed: 1307956 ms
Data processed: 118.662 GiB
Data remaining: 9.203 MiB
Data total: 8.005 GiB
Memory processed: 118.662 GiB
Memory remaining: 9.203 MiB
Memory total: 8.005 GiB
Memory bandwidth: 41.294 MiB/s
Dirty rate: 35040 pages/s
Page size: 4096 bytes
Iteration: 197
Constant pages: 1751031
Normal pages: 31041965
Normal data: 118.416 GiB
Expected downtime: 3314 ms
Setup time: 70 ms

https://www.redhat.com/archives/libvirt-users/2014-January/msg00007.html https://specs.openstack.org/openstack/nova-specs/specs/mitaka/implemented/abort-live-migration.html

https://www.server24.eu/private-cloud/complete-live-migration-vms-high-load/