[libvirt-users] failure creating a snapshot volume within a lvm-based pool

[Ján Tomko]

On 04/22/2013 07:40 PM, Edoardo Comar wrote:
> Hi

Hi,

> if I try to create another volume using the previous one as backing-vol, 
> the creation fails with what looks like an incorrect commandline for 
> lvcreate:
> 
> # virsh vol-create-as images_lvm myvol-instance 2G --backing-vol myvol
> error: Failed to create vol myvol-instance
> error: internal error Child process (/usr/sbin/lvcreate --name 
> myvol-instance -L 2097152K -s=/dev/libvirt_images_vg/myvol) unexpected 
> exit status 3: /usr/sbin/lvcreate: invalid option -- '='
>   Error during parsing of command line.

this has been fixed in 1.0.2 by commit ffee627a:
http://libvirt.org/git/?p=libvirt.git;a=commitdiff;h=ffee627a

> 
> Exactly the same happens if I specify a qcow2 format (the doc however says 
> that The logical volume pool does not use the volume format type element). 
> 

Yes, volume format has no effect on logical pools.

Jan