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As discussed on the libvirt mailing list (https://www.redhat.com/archives/libvir-list/2016-November/msg01270.html), 'virsh domjobinfo' used to provide progress info for storage migration: Job type: Unbounded Time elapsed: 1830632 ms Data processed: 37.212 GiB Data remaining: 1.025 GiB Data total: 16.016 GiB Memory processed: 37.212 GiB Memory remaining: 1.025 GiB Memory total: 16.016 GiB Memory bandwidth: 100.018 MiB/s Constant pages: 618279 Normal pages: 9734623 Normal data: 37.135 GiB Expected downtime: 1118 ms Setup time: 61 ms It doesn't anymore for qemu-kvm versions that do use nbd, but don't support migration events: $ sudo virsh domjobinfo 58358fec-c35c-4a7a-a4dd-18ec2e1327bf Job type: Unbounded Time elapsed: 209616 ms
This was implemented upstream by Nikolay Shirokovskiy in the "qemu: migration: show disks stats for nbd migration" series. The following is the most interesting commit from the series: commit 8c4665833750c66b435634678d0df2b71273e177 Refs: v3.7.0-28-g8c46658337 Author: Nikolay Shirokovskiy <nshirokovskiy> AuthorDate: Fri Sep 1 09:49:30 2017 +0300 Commit: Jiri Denemark <jdenemar> CommitDate: Thu Sep 7 11:18:10 2017 +0200 qemu: migrate: add mirror stats to migration stats When getting job info in case mirror does not reach ready phase fetch mirror stats from qemu. Otherwise mirror stats are already saved in current job. Signed-off-by: Jiri Denemark <jdenemar>