It looks like it has something to do with windows sharing on my storage appliance.
When I enable CIFS, that hidden folder appears.
The storage pool can't be created because the permissions on the .$EXTEND folder cannot be changed.
Apparently for the pool to be created virt-manager needs full access to all files and folders.
Grant




-----Original Message-----
From: Cole Robinson [mailto:crobinso@redhat.com]
Sent: Thu 12/22/2011 1:09 PM
To: Grant Siebrecht
Cc: libvirt-users@redhat.com
Subject: Re: [virt-tools-list] error creating NFS storage pool

On 12/16/2011 05:32 PM, Grant Siebrecht wrote:
> Virtual Machine Manager 0.9.0
> OS = Ubuntu 11.10
> I've tried changing permissions on my_nfs_server to 777 with still no luck.
>
>
>
> Error creating pool: Could not start storage pool: cannot open volume
> '/var/lib/libvirt/images/my_nfs_server/.$EXTEND': Permission denied
>
> Traceback (most recent call last):
>   File "/usr/share/virt-manager/virtManager/asyncjob.py", line 44, in cb_wrapper
>     callback(asyncjob, *args, **kwargs)
>   File "/usr/share/virt-manager/virtManager/createpool.py", line 480, in
> _async_pool_create
>     poolobj = self._pool.install(create=True, meter=meter, build=build)
>   File "/usr/lib/pymodules/python2.7/virtinst/Storage.py", line 489, in install
>     raise RuntimeError(errmsg)
> RuntimeError: Could not start storage pool: cannot open volume
> '/var/lib/libvirt/images/my_nfs_server/.$EXTEND': Permission denied
>

moving to libvirt-users

What is the .$EXTEND file? Is it a socket or something strange like that?

- Cole