[one-users] kvm bridge interface error

[Ruben Diez]

Hi Oliver:

I think that you must stay the 'unix_sock_group' variable of the 
libvirtd.conf file to the default value, because it is set by your 
distro to the user that own the libvirt process...

In the other hand, you can set the values:

# The user ID for QEMU processes run by the system instance
user = "oneadmin"
# The group ID for QEMU processes run by the system instance
group = "cloud"

in the "/etc/libvirt/qemu.conf".

Please note that is a good idea add the user "oneadmin" to the groups 
that runs both the "kvm" as the "libvirtd" processes.
In my case (debian squeeze, so should work for ubuntu):

~# groups oneadmin
oneadmin : cloud kvm libvirt


I hope this helps....




Javier Fontan escribió:
> Hello,
>
> What is the version you are using? In 2.0 by default it uses
> qemu:///system url to talk to libvirt. If you are using 1.4 in the
> configuration for kvm vmm, the file vmm_kvmrc it should be also
> configured for qemu:///system, is that correct?
>
> Also check that libvirtd is running as root, I suppose it is seeing
> that the files are owned by root. This error usually happens when
> virsh uses qemu:///session url to connect to it.
>
> Bye
>
>
> On Tue, Sep 28, 2010 at 1:28 PM, Olivier Sallou <olivier.sallou at irisa.fr> wrote:
>   
>>  Hi,
>> I have an error at my VM boot:
>>
>> Tue Sep 28 13:07:09 2010 [VMM][D]: Message received: LOG - 8 error: internal
>> error Failed to add tap interface 'vnet%d' to bridge 'br0' : Permission
>> denied
>>
>> I use a bridge on my worker node and my template refer to this bridge. The
>> bridge works (I have a manually installed VM that use it).
>> I think the issue is when one tries a brctl on my bridge (using CentOS).
>>
>> I wonder what rights are required ? I could of course add oneadmin user to
>> root group, but I do not think this is a good solution.
>>
>> I have set in libvirtd.conf:
>> unix_sock_group = "oneadmin"
>>
>> and:
>>
>> [root at genomobyle network-scripts]# ls -la /var/run/libvirt
>> total 20
>> drwxr-xr-x  4 root root     4096 sep 28 13:05 .
>> drwxr-xr-x 30 root root     4096 sep 28 13:05 ..
>> srwxrwx---  1 root oneadmin    0 sep 28 13:05 libvirt-sock
>> srwxrwxrwx  1 root oneadmin    0 sep 28 13:05 libvirt-sock-ro
>> drwxr-xr-x  2 root root     4096 sep 16 09:51 network
>> drwxr-xr-x  2 root root     4096 sep 24 14:47 qemu
>>
>>
>> Thanks if you have any clue...
>>
>> Olivier
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>>
>>     
>
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