[libvirt] [PATCH v2] storage backend: Add sheepdog support

[Daniel P. Berrange]

On Thu, Jun 14, 2012 at 01:14:56PM +0200, Sebastian Wiedenroth wrote:
> 
> This patch brings support to manage sheepdog pools and volumes to libvirt.
> It uses the "collie" command-line utility that comes with sheepdog for that.
> 
> A sheepdog pool in libvirt maps to a sheepdog cluster.
> It needs a host and port to connect to, which in most cases
> is just going to be the default of localhost on port 7000.
> 
> A sheepdog volume in libvirt maps to a sheepdog vdi.
> To create one specify the pool, a name and the capacity.
> Volumes can also be resized later.
> 
> In the volume XML the vdi name is prefixed with "sheepdog:"
> and put into the <target><path>. To use the volume as a disk source for
> virtual machines specify the vdi name as "name" attribute of the <source>.
> The host and port information from the pool are specified inside the host tag.
> 
>   <disk type='network'>
>     ...
>     <source protocol="sheepdog" name="vdi_name">
>       <host name="localhost" port="7000"/>
>     </source>
>   </disk>
> 
> To work right this patch parses the output of collie,
> so it relies on the raw output option. There recently was a bug which caused
> size information to be reported wrong. This is fixed upstream already and
> will be in the next release.
> 
> Signed-off-by: Sebastian Wiedenroth <wiedi at frubar.net>

ACK, this patch addressed all the things I raised last time. Lets
see if Eric has any more detailed code review feedback....


Daniel
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