[libvirt] [RFC][PATCH] LXC allow a container to have ethN named interfaces

Daniel P. Berrange berrange at redhat.com
Tue Nov 3 21:02:01 UTC 2009

On Tue, Nov 03, 2009 at 12:23:26AM +0900, Ryota Ozaki wrote:
> Note that this patch is not mature yet and still proof-
> of-concept prototype, although it actually works.
> Current implementation of lxc driver creates vethN named
> interface(s) in the host and passes as it is to a container.
> The reason why it doesn't use ethN is due to the limitation
> that one namespace cannot have multiple iterfaces that have
> an identical name so that we give up creating ethN named
> interface in the host for the container.
> However, we should be able to allow the container to have
> ethN by changing the name after clone(CLONE_NEWNET) in
> controller.
> To this end, this patch extends --veth argument of
> controller to be able to have two names; one is the name
> of a created veth, and the other is a new name. The format
> is:
>   --veth veth1,eth0 --veth veth3,eth1 ...

Do we need to pass the names around on command line args ? Could
we simply make libvirt_lxc auto-assign the names starting from
eth0  instead of passing the names from libvirtd

THe patch is a good idea though regardless - having them named eth0 is
much more familiar for users

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