Re: strict isolation of net interfaces

[Daniel Lezcano]

Serge E. Hallyn wrote:
> Quoting Cedric Le Goater (clg@xxxxxxxxxx):
>
> > we could work on virtualizing the net interfaces in the host, map them to
> > eth0 or something in the guest and let the guest handle upper network layers ?
> >
> > lo0 would just be exposed relying on skbuff tagging to discriminate traffic
> > between guests.
>
>
> This seems to me the preferable way.  We create a full virtual net
> device for each new container, and fully virtualize the device
> namespace.

I have a few questions about all the network isolation stuff:

  * What level of isolation is wanted for the network ? network devices 
? IPv4/IPv6 ? TCP/UDP ?

  * How is handled the incoming packets from the network ? I mean what 
will be mecanism to dispatch the packet to the right virtual device ?

  * How to handle the SO_BINDTODEVICE socket option ?

  * Has the virtual device a different MAC address ? How to manage it 
with the real MAC address on the system ? How to manage ARP, ICMP, 
multicasting and IP ?

It seems for me, IMHO that will require a lot of translation and 
browsing table. It will probably add a very significant overhead.

   * How to handle NFS access mounted outside of the container ?

   * How to handle ICMP_REDIRECT ?

Regards







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