[libvirt-users] Hotplug of disk devices in LXC failed with libvirt of version 1.0.2

[Gao feng]

On 07/15/2013 04:01 PM, hzguanqiang wrote:
> Hi Daniel,
> 
> I noticed that the patch "Add support for hotplug/unplug of disk devices in LXC" you wrote had been merged into libvirt of version 1.0.2.
> But when I used this function, it report an error with details as following:
> 
> ubuntu at lxc:~$ vir attach-device instance-0000002c disk.xml --config          
> error: Failed to attach device from disk.xml
> error: Unable to create device /proc/18377/root/dev/sdb: Permission denied
> 
> ubuntu at lxc:~$ vir attach-device instance-0000002c disk.xml
> error: Failed to attach device from disk.xml
> error: Unable to create device /proc/18377/root/dev/sdb: Permission denied
> 
> ubuntu at lxc:~$ cat disk.xml
>     <disk type='block' device='disk'>
>       <driver type='raw' cache='none'/>
>       <source dev='/dev/dm-0'/>
>       <target dev='sdb' bus='scsi'/>
>     </disk>
> 

You should use attach-disk not attach-device.

vir attach-disk instance-0000002c /dev/dm-0 sdb

Thanks