Re: hostapd in lxc

A couple random comments.

LXC is reasonably easy to install.  My impression is that it is more flexible than Docker.
Docker seems designed to run a single service, while LXC is essentially a complete virtual
environment.  If you want to run multiple services (DHCP, DNS, NFS, SAMBA), you probably
want to run them on a single LXC instance, rather than running multiple Docker instances
or trying to run multiple services on a single Docker instance.

If you want the container on your LAN, you need to set up a bridged network.  Essentially,
you create a bridge to the NIC/LAN, and create a virtual NIC on the host and in each container
that connects to the bridge.  (I've set up bridged networking many times, for VirtualBox
and various containers, and it always is a bit confusing.  I think that the terminology is
backward.  I think of eth0 as the NIC hardware, and br0 and a bridge to it.  That's opposite
from what it is in reality.  Br0 is connected to the LAN; eth0 is a virtual NIC.)


On 12/30/2016 11:38 AM, Ehud Kaldor wrote:
> Sorry for the time lag.
>
> I'm using Docker, so I'm not sure all will apply to lxc, but here goes:
> I want to set up my home network (DHCP, DNS, gateway, file server etc.) using containers. If for
> nothing else, than for the experience with containers.
>
> It works if the container is connected to the host's net directly (--net=host), but I want the
> container to be its own network entity, with a MAC and IP. That way, moving it between hosts is
> seamless.
>
> It seems a macvlan network is the best option, but I have not tried it yet. In fact, I tried it
> before libnetwork was released, so routing traffic to the container on the host's network we hard.
> But it needed to, as DHCP protocol is in effect before IP is up, so lower level protocols need to
> routed in to the container, which was not simple.
>
> These days, with Swarm and Docker network, it is probably simpler. Yet, I am hunting for insights
> before I start breaking things apart again...
>
> Ehud
>
> On Wed, Dec 28, 2016, 00:20 Ivan Sergio Borgonovo <[email protected]
> <mailto:[email protected]>> wrote:
>
>     On 12/28/2016 12:32 AM, Ehud Kaldor wrote:
>      > Hi Ivan,
>      > Do you also run DHCP in a container? If so, can you share how you did it?
>
>     No, I don't. dnsmasqd runs on my router.
>     I never configured a dhcp server (other than using the openwrt gui).
>     Still I can not envision what extra problems you had to face.
>     What went wrong? Which dhcp server?
>
>     --
>     Ivan Sergio Borgonovo
>     http://www.webthatworks.it http://www.borgonovo.net
>
>
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