[libvirt-users] libvirt error

[Michal Privoznik]

On 27.06.2014 13:33, abhishek jain wrote:
> Hi
>
> I need to run libvirt without ebtables support as it results in
> following error while running VM....
>
>
>
> sudo virsh start  instance-0000000b
> error: Failed to start domain instance-0000000b
> error: Error while building firewall: Some rules could not be created
> for interface tapf733e054-fe: Failure to execute command '$EBT -t nat -A
> libvirt-J-tapf733e054-fe  -j J-tapf733e054-fe-mac' : 'Unable to update
> the kernel. Two possible causes:
> 1. Multiple ebtables programs were executing simultaneously. The ebtables
>     userspace tool doesn't by default support multiple ebtables programs
> running
>     concurrently. The ebtables option --concurrent or a tool like flock
> can be
>     used to support concurrent scripts that update the ebtables kernel
> tables.
> 2. The kernel doesn't support a certain ebtables extension, consider
>     recompiling your kernel or insmod the extension.
> .'.

I'd suggest reconfiguring kernel so it has CONFIG_BRIDGE_NF_EBTABLES, 
CONFIG_BRIDGE_EBT_T_FILTER and potentially others enabled.

Michal