[Lxc-users] Alternative network protocols

[Joe Stringer]

On 17 July 2012 19:45, Daniel Lezcano <daniel.lezcano at free.fr> wrote:
> On 07/17/2012 05:12 AM, Joe Stringer wrote:
>> On 17 July 2012 13:59, Stéphane Graber <stgraber at ubuntu.com> wrote:
>>> On 07/16/2012 09:24 PM, Joe Stringer wrote:
>>>> Hi there,
>>>>
>>>> I've come across an issue when trying to use SCTP with lxc, and I
>>>> wonder if anyone might have some insight into what's causing this.
>>>>
>>>> My set up has two lxc hosts connected to an instance of Open vSwitch,
>>>> vm0 and vm1. When I attempt to use the sctp_test utility that comes
>>>> with the debian package lksctp-tools from within either VM, it reports
>>>> back that the address family is not supported:-
>>>>
>>>>
>>>> root at vm0:~# sctp_test -H 0 -P 250 -l
>>>> local:addr=0.0.0.0, port=250, family=2
>>>> seed = 1342081047
>>>>
>>>> Starting tests...
>>>>         socket(SOCK_SEQPACKET, IPPROTO_SCTP)
>>>>
>>>>                *** socket: failed to create socket:  Address family
>>>> not supported by protocol ***
>>>>
>>>>
>>>> The interfaces appear to be set up fine, I can ping from one vm to the
>>>> other with no trouble. The host can successfully run the above command
>>>> as well.
>>>>
>>>> Is this because of socket using SOCK_SEQPACKET?
>>>>
>>>> Cheers,
>>>> Joe
>>> It's not easy to tell whether it's the case here, but some protocols
>>> require extra kernel modules to work properly.
>>> On a regular system these modules are loaded dynamically the first time
>>> you try to create a socket of that type, but in a container, it
>>> typically won't work.
>>>
>>> If that's the case, check on a regular system what the modules are and
>>> load them on your host, then try again from the container.
>>>
>>> --
>>> Stéphane Graber
>>> Ubuntu developer
>>> http://www.ubuntu.com
>>>
>>>
>> Hi Stéphane,
>>
>> Thanks for the quick reply. You're right regarding the use of a kernel
>> module to support SCTP. I have loaded the 'sctp' module on the host,
>> but the container still throws up the same error with sctp_test. I
>> tried restarting the containers after loading the module, but this
>> doesn't make a difference.
>>
>> Are there any configuration files I could post that might help to
>> identify the cause of this?
>
> What kernel version are using ?
>

Apologies for the delay, the email slipped past me.

I was using 2.6.32-5-amd64 (Debian Squeeze).