Re: [Xen-devel] XCP: python SR plugin questions

Jonathan Ludlam
Wed, 19 May 2010 10:18:40 -0000

On 19 May 2010, at 10:07, YAMAMOTO Takashi wrote:

> hi,
>
> thanks for quick reply.
>
>> Hi there,
>>
>> On 19 May 2010, at 03:35, YAMAMOTO Takashi wrote:
>>
>>> hi,
>>>
>>> i''m writing a python sr plugin for our product and have a
few questions.
>>>
>>> - our product has 32-bit id, not uuid, for each volumes, which i
want to map
>>> to xcp''s vdi.  i generate name-based uuid from the 32-bit
id in sr.scan and
>>> vdi.create.  is this a reasonable approach?
>>>
>>
>> You can use the ''location'' field in the VDI to
contain your 32 bit id - then the uuid is irrelevant. I''d like to move
more of the storage backends in this direction - currently I believe only the
ISO SR does it this way.
>
> ok.  in that case, xapi generates random uuids for me, right?
>

Actually the backends are responsible for creating the uuid.

>>
>>> - how can i get name-label specified by "xe vdi-create"
in my vdi.create?
>>> i want to pass it to our product.
>>>
>>
>> Unfortunately this isn''t possible at the moment. What you
could do is pick the name up on a subsequent scan. This is ugly, I know, and
might not even work if you need the name at VDI create time, but it''s
all we''ve got at the moment. This is on my list of things to fix about
the SMAPI.
>
> sad to hear. :(
>
> our product needs a unique and preferably human readable name for
> the VDI at create time.  do you have any suggestion?
> probably i have to use uuid generated by xapi?
>

Unfortunately there''s no alternative at the moment :-(

> YAMAMOTO Takashi
>
>>
>>> if you are intersted, the "our product" is found at
>>> http://sourceforge.net/projects/vastsky/
>>>
>>> YAMAMOTO Takashi
>>>
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