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Re: [virt-tools-list] [libvirt-users] virt-manager - how to add /dev/mapper as a storage pool



On 08/09/2011 12:31 PM, Marc Haber wrote:
> On Tue, Aug 09, 2011 at 11:09:06AM -0400, Cole Robinson wrote:
>> On 08/08/2011 04:37 PM, Marc Haber wrote:
>>> I would like to be able to configure VMs running off dm-crypt devices
>>> that were unlocked in the host. Unlocked dm-crypt devices show up in
>>> /dev/mapper/devicename, with devicename being the second parameter
>>> given to cryptsetup luksOpen.
>>>
>>> The LVM storage pool type insists on searching in /dev/vgname and
>>> cannot be tricked into reading /dev/mapper by giving it a fake VG
>>> named mapper; the LVM storage pool type "dir" mishandles
>>> /dev/mapper/control ("illegal seek").
>>>
>>> Is there a workaround to be able to use such devices in virt-manager
>>> without having to define a single storage pool for every device used?
>>
>> cc-ing virt-tool-list
> 
> Bcc, or forgotten?
> 
>> Latest virt-manager-0.9.0 allows adding a libvirt mpath pool which might
>> be what you're looking for. If you don't have that version you can try
>> configuring it on the command line with virsh.
> 
> I have that version, but an mpath pool set to /dev/mapper stays empty.
> Googling and reading the available docs suggests that this feature
> only looks for /dev/mapper/mpath*
> 

Forgotten, sorry.

Not really sure then, maybe this is something that libvirt should be
extended to handle. CCing libvirt devel list

- Cole


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