[libvirt] [PATCH v2 19/22] qemu: Work around weired migration status changes

[Peter Krempa]

On Tue, Jun 02, 2015 at 14:34:24 +0200, Jiri Denemark wrote:
> When cancelling migration we can see the following conversation on QMP
> monitor:
> 
> {"execute":"migrate_cancel","id":"libvirt-33"}
> {"timestamp": {"seconds": 1432899178, "microseconds": 844907}, "event":
> "MIGRATION", "data": {"status": "cancelling"}}
> {"return": {}, "id": "libvirt-33"}
> {"timestamp": {"seconds": 1432899178, "microseconds": 845625}, "event":
> "MIGRATION", "data": {"status": "failed"}}
> {"timestamp": {"seconds": 1432899178, "microseconds": 846432}, "event":
> "MIGRATION", "data": {"status": "cancelled"}}
> 
> That is, migration status first changes to "failed" just to change to
> the correct "cancelled" state in a few moments later. However, this is
> enough to let libvirt report migration failed for unknown reason instead
> of having been cancelled by a user.
> 
> This should really be fixed in QEMU but I'm not sure how easy it is.

Is qemu going to fix it? I'd rather see it done that way rather than
fixing it up in libvirt.

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