Re: [libvirt-users] Possible to edit/apply nwfilter at runtime?

Andre Goree
Fri, 16 Feb 2018 18:44:10 -0000

On 2018/02/16 12:12 pm, Daniel P. Berrangé wrote:
> On Fri, Feb 16, 2018 at 11:59:42AM -0500, Andre Goree wrote:
>> I'm trying to determine if it's possible to edit/attach/apply
nwfilter
>> rules
>> at runtime?  I.e., after a VM is already running, can I apply a
>> nwfilter to
>> the VM and have it work without rebooting the machine?  Thus far,
I've
>> not
>> come across a way to do so, but I thought I'd ask here before I
chase
>> my
>> tail around Google.
>
> Simply re-define the nwfilter in question using  virsh nwfilter-define.
> Any VMs using that filter will automatically update.
>
>
> Regards,
> Daniel
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Thank you for the quick reply.

As for adding the nwfilter to a guest that does not already have the
filter, will that guest need to be rebooted?  Or can I add it to the
guest via 'virsh edit'?
I ask becase, from what I can tell, adding a new filter via 'virsh edit'
doesn't seem to work -- though it's good to know that once a
'filterref'
has been defined in the guest, it can be adjusted on the fly.