[libvirt] [PATCH] qemu migration: assign addresses in xml passed as parameter

[Jiri Denemark]

On Tue, Feb 09, 2016 at 11:36:32 +0300, Nikolay Shirokovskiy wrote:
> Usecase:
> 
> 1. define domain with xml A where addresses are not set
> 2. migrate with '--xml A'

This use case is incorrect. To make sure the ABI compatibility checks
pass, you should take the XML back from libvirt. In addition to
assigning PCI addresses, libvirt may add some implicit devices (such as
USB controllers, keyboards, balloon device, ...) or even reorder some
elements in the XML.

That said, you should follow the steps below:

- define a domain using A.xml
- start the domain
- fetch the updated XML (virsh dumpxml --migratable >B.xml)
- change whatever you need in B.xml
- start migration with --xml A.xml

Jirka