[libvirt] [OSSTEST PATCH 2/2] libvirt: Do not attempt save/restore when migration not advertised
Martin Kletzander
mkletzan at redhat.com
Thu Oct 6 10:42:55 UTC 2016
On Thu, Oct 06, 2016 at 10:59:06AM +0100, Ian Jackson wrote:
>Martin Kletzander writes ("Re: [OSSTEST PATCH 2/2] libvirt: Do not attempt save/restore when migration not advertised"):
>> Since offline migration (as in migrating a domain between hosts without
>> being running) is not that used in the code and talked about, I'm
>> guessing offline means save restore. Looking at the history it was
>> added before the "offline" migration, so it probably means
>> save/restore. To avoid confusion, I would suggest we add either
>> <offline/> or rather <save/> (the naming is not important) and document
>> what it means. And then you can use it exactly how you'd like. And
>> you'll be also sure it means what you need it to mean ;) The patches
>> will be straigh-forward, let me know if I can help anyhow.
>
>Except that the point of the exercise is to detect which features are
>supported in which versions. Whatever I do in osstest needs to work
>with older libvirt versions, which do not report
> /capabilities/host/migration_features/save
>even on x86, where it is supported. I suppose I could detect
> /capabilities/host/migration_features/live
>and assume that save/restore was supported (since it's unlikely that
>live migration would be supported but not save/restore).
>
>So for now I think I need to use
> /capabilities/host/migration_features
>as a proxy for save/restore ?
>
Well then, unfortunately you do.
Also, looking at how the code is structured, if you have live migration
but don't have save/restore, you won't have <migration_features/> there
at all.
>Ian.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 801 bytes
Desc: Digital signature
URL: <http://listman.redhat.com/archives/libvir-list/attachments/20161006/a0cbe50c/attachment-0001.sig>
More information about the libvir-list
mailing list