Bug 1204040

Summary:	Enhancing block/disk migration in libvirt
Product:	Red Hat Enterprise Linux 7	Reporter:	Jaroslav Suchanek <jsuchane>
Component:	libvirt	Assignee:	Jiri Denemark <jdenemar>
Status:	CLOSED DUPLICATE	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	low	Docs Contact:
Priority:	medium
Version:	7.2	CC:	j.rosenboom, kchamart, mprivozn, rbalakri, tony
Target Milestone:	rc	Keywords:	FutureFeature
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:	1203032	Environment:
Last Closed:	2015-04-14 13:21:13 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1203032, 1283495
Bug Blocks:

Description Jaroslav Suchanek 2015-03-20 08:46:22 UTC

+++ This bug was initially created as a clone of Bug #1203032 +++

This is more a feature request than bug.  As libvirt is working it's just that users would benefit from this support.

Here is some context form the openstack world (which at least some of you are
aware of).  There are at least 2 open bug against openstack (nova) in the area
of block/disk migration.

1) Live migration fails when the instance has a config-drive[1]
   Here openstack(nova) fails because a drive that nova expects to be migrated
   isn't migrated.

2) libvirt live_snapshot periodically explodes on libvirt 1.2.2 in the gate[2]
   Here openstack(nova) fails because a drive that nova expects NOT to be
   migrated is migrated.

To me these are essentially the same bug/issue.  There is no way to communicate with
libvirt the users expectations around block/disk mirgration.


The suggestions from the mailing list are to enhance virDomainMigrate3 to take a list of devices to migrate.

[1] https://bugs.launchpad.net/nova/+bug/1246201
[2] https://bugs.launchpad.net/nova/+bug/1334398

--- Additional comment from Tony Breeds on 2015-03-17 20:31:18 EDT ---

I'm very happy to do this work (so I assigned it to me).

I just need to free up the time.

Comment 1 Jiri Denemark 2015-04-14 13:21:13 UTC


*** This bug has been marked as a duplicate of bug 1210352 ***