[libvirt] domain XML for tracking libosinfo ID

[Martin Kletzander]

On Wed, Sep 05, 2018 at 09:28:52AM +0100, Daniel P. Berrangé wrote:
>On Tue, Sep 04, 2018 at 03:44:12PM -0400, Cole Robinson wrote:
>> Right now in virt-manager we only track a VM's OS name (win10, fedora28,
>> etc.) during the VM install phase. This piece of data is important
>> post-install though: if the user adds a new disk to the VM later, we want to
>> be able to ask libosinfo about what devices the installed OS supports, so we
>> can set optimal defaults, like enabling virtio.
>>
>> There isn't any standard libvirt XML field to track this kind of info
>> though, so apps have to invent their own schema. nova and rhev do it
>> indirectly AFAICT. gnome-boxes does it directly with XML like this:
>>
>>   <metadata>
>>     <boxes:gnome-boxes xmlns:boxes="https://wiki.gnome.org/Apps/Boxes">
>>       <os-id>http://fedoraproject.org/fedora/28</os-id>
>>       ....
>>     </boxes:gnome-boxes>
>>   </metadata>
>>
>> I want to add something similar to virt-manager but it seems a shame to
>> invent our own private schema for something that most non-trivial virt apps
>> will want to know about. I was thinking a schema we could document with
>> libosinfo, something like
>>
>> <metadata>
>>   <libosinfo
>> xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">
>>     <os-id>http://fedoraproject.org/fedora/28</os-id>
>>   </libosinfo>
>> </metadata>
>
>Yes, I would like to see this standardized under <matadata>.
>

Me too and what Cole suggested looks fine.

>
>Regards,
>Daniel
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