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

[hzguanqiang]

Hi, Gao Feng

I've tried what you said, but still exists the problem:

ubuntu at lxc:~$ vir attach-disk instance-0000002c   /dev/dm-0 sdb
error: Failed to attach disk
error: Unable to create device /proc/10366/root/dev/sdb: Permission denied

I think finding what it means by saying 'Unable to create device /proc/10366/root/dev/sdb: Permission denied' is the key. 
But anyway, thanks for your help!

>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