VHD/VPC Support

[Ian McLeod]

On 05/06/2015 02:59 PM, Dennis Gilmore wrote:
> On Tuesday, May 05, 2015 01:07:20 PM Jay Greguske wrote:
>> Hey,
>>
>> This patch adds support for the VPC/VHD image format. Like a few
>> before it, koji will call qemu-img on the host to do the conversion.
> 
> is this subject to the same types of compatibility issues we are currently 
> seeing with qcow2? in that the images we create are not usable with older OS's 
> as qemu can not read them, we need to set a compat flag to make compatable 
> images.  I am not sure if the new format is supposed to be .qcow3 or or if 
> they are supposed to be .qcow2 but are just incompatable.

VHD is ancient and has been relatively stable, at least for use with MS
products.

(There are some undocumented extensions that the Xenserver folks came up
with, which are needed when uploading to Rackspace or other Xenserver
based solutions, but that is not the target for this patch.)

> 
> Dennis
> 
>  
> 
> 
> 
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