[lxc-users] LXC - Best way to avoid networking changes in a container

[Fajar A. Nugraha]

On Fri, Jun 26, 2015 at 8:20 PM, Benoit GEORGELIN - Association
Web4all <benoit.georgelin at web4all.fr> wrote:
> Hi Fajar,
>
> If the container have this setting
>
> lxc.network.type = veth
> lxc.network.flags = up
> lxc.network.hwaddr = 00:16:3e:2e:51:17
> lxc.network.veth.pair = veth-cont1-0
> lxc.network.ipv4 = 209.126.100.172/32
> lxc.network.ipv4.gateway = 10.0.0.1
>
>
> And the root user in the container change the file /etc/network/interfaces to something else than
>
> iface eth0 inet manual
>
> Does the container configuration will be still the one used or the new ip address configured in the container will be talking to the network though the veth ?


The container config lines above makes lxc-start configure necessary
IP and routes. If the container has its own configuration, it will
override the current active ip/routes.

If the container root user change its configuration (e.g
/etc/network/interfaces) to use the SAME IP/routes (like in my
previous link), it would obviously still work.

If the container root user change it to use another container (e.g.
container B)'s IP address, then AFAIK the host will simply ignore it.
At least that what happens on my tests.

-- 
Fajar