Red Hat Bugzilla – Bug 1473863
live-migration with boot from volume + config_drive takes a very long time.
Last modified: 2018-03-17 17:31:34 EDT
Can we get some traction for this BZ?
I can't reproduce this locally, btw. Migration of boot from volume with config drive completes normally here.
Closed without a fix therefore QE won't automate
I've now reproduced this locally.
1. Create a boot-from-volume instance with a large root disk (e.g. 100G) and a config disk, but no other disks.
2. Live migrate the instance.
The bug can be considered verified if the live migration completes faster than the root disk could reasonably have been copied over the network. That is, a lightly loaded instance should live migrate in 'a few' seconds.
The bug can be directly verified by enabling libvirt debug logging and observing that no block migration of the root disk takes place, or by noting that migrateToURI3() is called with no/empty migrate_disks parameter and without VIR_MIGRATE_NON_SHARED_INC (value 128) in flags.