[lxc-users] Fun with lxc.network.type=phys

[ScrumpyJack]

On Mon, 19 Jan 2015, ScrumpyJack wrote:
 
> I'd like to connect a physical interface from a host to a LXC container 
> guest like so:
> 
> lxc.network.type=phys
> 
> And then assign a routable IP/32 address to the LXC container for it to 
> "just work".
> 
> The problem is that I don't have a spare "real" physical interface, so on 
> the host i create a "virtual" interface
> 
>  ip link add link eth0 mac0 type macvlan
> 
> I now have a new virtual interface called mac0 with a separate mac address 
> in my host. I assign it a test IP and it can be pinged from outside the 
> host.
> 
> I add the following details to the container's config file
> 
> lxc.network.type=phys
> lxc.network.flags = up
> lxc.network.link = mac0
> lxc.network.name = eth1
> 
> 
> I boot my LXC guest, and as expected the mac0 virtual interface gets 
> passed on to the guest, as the guest has a new interface called eth1 with 
> exactly the same mac address as the randomly generated mac0 mac address 
> from the host, and the mac0 interface is no longer available in the host.
> 
> But that's as far as it goes. Assigning the same test IP address to the 
> guest doesn't have the desired effect and the containers is unreachable. I 
> see the traffic coming into eth0 on the host, but that's it. The guest 
> doesn't seem to get the traffic with it's IP.
> 
> I don't want to use bridging, veths or taps, or any method other than physical.
> 

hi again. I'm wondering if my setup is so silly that all as ignoring it :)
Meanwhile, I'm trawling this mailing list and searching online and there 
is nothing i see that might be of any help.
If anyone with knowledge of lxc networking would be kind enough to tell me 
whether I'm mad or not, then I could keep looking for give up on passing a 
macvlan host interface to the LXC physically. That would be most kind.