[Openstack] [Quantum/OVS] Br-int not responsive after network node reboot

Sylvain Bauza sylvain.bauza at digimind.com
Tue Feb 19 13:47:24 UTC 2013


Le 19/02/2013 13:31, Gary Kotton a écrit :
> On 02/19/2013 01:57 PM, Sylvain Bauza wrote:
>> Hi,
>>
>> I progressed in investigating the bug. I forgot to mention I was 
>> following "Provided Router/single tenancy" setup.
>> So, at reboot, my tap/qg/qr network interfaces were down :
>> 7: qg-c39e5df4-7f: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
>>     link/ether fe:10:8c:d8:d8:ca brd ff:ff:ff:ff:ff:ff
>>     inet 192.168.10.1/16 brd 192.168.255.255 scope global qg-c39e5df4-7f
>>     inet 192.168.10.2/32 brd 192.168.10.2 scope global qg-c39e5df4-7f
>> 8: qr-f76e4668-fa: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
>>     link/ether 52:93:35:8b:11:ff brd ff:ff:ff:ff:ff:ff
>>     inet 10.0.0.1/24 brd 10.0.0.255 scope global qr-f76e4668-fa
>> 9: tap2ed3cd8a-03: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
>>     link/ether 0e:3e:e0:61:5e:b0 brd ff:ff:ff:ff:ff:ff
>>     inet 10.0.0.2/24 brd 10.0.0.255 scope global tap2ed3cd8a-03
>>
>> So, a short 'ip link set <dev> up' for the three above fixed my 
>> issue. Other terms, GRE tunneling is fine at reboot, only interface 
>> status is wrong.
>> Do you have any idea how to fix it ? I can't issue a 'post-up' 
>> statement in /etc/network/interfaces and /etc/rc.local is quite a 
>> ugly patch I think.
>
> The problem is as follows:
> When you reboot the host the openvswitch will create the interfaces on 
> restart. this causes problems with the dhcp and the l3 agents.
> the solution to this is to run the quantum-ovs-cleanup utility on 
> reboot prior to the dhcp and the l3 agents.
>
> thanks
> Gary
>
>

Thanks, got the bug# : https://bugs.launchpad.net/quantum/+bug/1091605
As the fix is released in 2012.2.3, I have to patch manually or keep my 
method (pref.) of deleting/creating bridges (as only Quantum is using 
these bridges).

Thanks for the quick answer.
-Sylvain




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