[libvirt-users] virt-manager - how to add /dev/mapper as a storage pool
Hi, 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? Greetings Marc -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers. They | Mailadresse im Header Mannheim, Germany | lose things." Winona Ryder | Fon: *49 621 72739834 Nordisch by Nature | How to make an American Quilt | Fax: *49 3221 2323190
On 08/08/2011 04:37 PM, Marc Haber wrote:
Hi,
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?
Greetings Marc
cc-ing virt-tool-list 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. Some more info: http://libvirt.org/storage.html#StorageBackendMultipath - Cole
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* Greetings Marc -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers. They | Mailadresse im Header Mannheim, Germany | lose things." Winona Ryder | Fon: *49 621 72739834 Nordisch by Nature | How to make an American Quilt | Fax: *49 3221 2323190
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
On Tue, Aug 09, 2011 at 12:45:06PM -0400, Cole Robinson wrote:
Not really sure then, maybe this is something that libvirt should be extended to handle. CCing libvirt devel list
Please note that I am only subscribed to libvirt-users, please Cc me on replies. There is also https://bugzilla.redhat.com/show_bug.cgi?id=710866 which I filed back in June when I encountered this for the first time. I accidentally filed the issue a second time yesterday but marked it as a duplicate. Greetings Marc -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers. They | Mailadresse im Header Mannheim, Germany | lose things." Winona Ryder | Fon: *49 621 72739834 Nordisch by Nature | How to make an American Quilt | Fax: *49 3221 2323190
participants (2)
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Cole Robinson -
Marc Haber