[Lxc-users] lxcbr0 on Ubuntu 12.04

[Stéphane Graber]

On 07/14/2012 09:48 AM, Serge Hallyn wrote:
> Quoting Clemens Perz (cperz at gmx.net):
>>
>>
>> On 13.07.2012 17:08, Stéphane Graber wrote:
>>> On 07/13/2012 03:36 AM, groupie wrote:
>>>> Hi all!
>>>>
>>>> I tried to figure out a glitch with the bridge interface in precise. Its
>>>> a fresh desktop install and after booting the machine, lxcbr0 never exists.
>>>>
>>>> I open a terminal and do sudo service lxc restart and woop, without
>>>> errors, it just comes up.
>>>>
>>>> Two more details: I dont have any containers in auto, I start them as
>>>> needed. And there is a named running for local dns resolution on all
>>>> virtual networks (using kde and vmware on the same machine)
>>>>
>>>> Any ideas where to tweak?
>>>>
>>>> Cheers,
>>>> Your groupie
>>>
>>> You'll probably want to check /var/log/upstart/lxc* for errors.
>>>
>>>
>>
>> That contained a hint indeed:
>> dnsmasq: failed to create listening socket for 192.168.122.1: Address
>> already in use
>>
>> A look into lxc-net.conf shows that it buggers out when it cant start
>> dnsmasq and removes the bridge completely. So at starttime named is some
>> milliseconds faster to aquire the bridge interface and makes dnsmasq
>> fail. Bridge removed, named kicked in the ass. So you do a restart later
>> everything works fine.
>>
>> I just added USE_LXC_DNSMASQ="false" to the lxc defaults and the
>> corresponding if statement to lxc-net.conf. Works now even on boot time.
>>
>> Cheers,
>> Groupie
> 
> Note that the fix for this (installing an /etc/dnsmasq.d/lxc file which
> makes the system-wide dnsmasq bind-interfaces except lxcbr0) should be
> clearing SRU soon.  (I thouhgt it already had)
> 
> -serge

It did. It was part of the last batch (0.7.5-3ubuntu59).

-- 
Stéphane Graber
Ubuntu developer
http://www.ubuntu.com



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