[Rdo-list] Issues with rdo-release-4 and external networking / br-tun

[Kashyap Chamarthy]

On Fri, Jul 18, 2014 at 10:39:43AM -0700, uberj wrote:

[. . .]

>    2014-07-18 16:06:03.255 28794 ERROR neutron.agent.linux.ovs_lib
>    [req-2fc4abd3-483a-4476-b14d-78c09b04368c None] Unable to execute
>    ['ovs-ofctl', 'del-flows', 'br-tun']. Exception:
>    Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf',
>    'ovs-ofctl', 'del-flows', 'br-tun']
>    Exit code: 1
>    Stdout: ''
>    Stderr: 'ovs-ofctl: br-tun is not a bridge or a socket\n'
>    2014-07-18 16:06:03.325 28794 ERROR neutron.agent.linux.ovs_lib
>    [req-2fc4abd3-483a-4476-b14d-78c09b04368c None] Unable to execute
>    ['ovs-ofctl', 'add-flow', 'br-tun',
>    'hard_timeout=0,idle_timeout=0,priority=1,in_port=1,actions=resubmit(,1)'].
>    Exception:
>    Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf',
>    'ovs-ofctl', 'add-flow', 'br-tun',
>    'hard_timeout=0,idle_timeout=0,priority=1,in_port=1,actions=resubmit(,1)']
>    Exit code: 1
>    Stdout: ''
>    Stderr: 'ovs-ofctl: br-tun is not a bridge or a socket\n'
>    2014-07-18 16:06:03.380 28794 ERROR neutron.agent.linux.ovs_lib
>    [req-2fc4abd3-483a-4476-b14d-78c09b04368c None] Unable to execute
>    ['ovs-ofctl', 'add-flow', 'br-tun',
>    'hard_timeout=0,idle_timeout=0,priority=0,actions=drop']. Exception:
>    Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf',
>    'ovs-ofctl', 'add-flow', 'br-tun',
>    'hard_timeout=0,idle_timeout=0,priority=0,actions=drop']
>    Exit code: 1
>    Stdout: ''
>    Stderr: 'ovs-ofctl: br-tun is not a bridge or a socket\n'

>From here[1], the above seems (at-least on Ubuntu machines) like an
incompatibility between OVS (1.10.2) and Kernel (3.11.0-20). But I see
from below that you're using OVS 1.11.0.

I don't have a 6.5 machine handy to check. You might want to ensure
you have whatever newest Kernel/OVS/openstack-neutron packages available
for CentOS 6.5 RDO.

Also, here's some configs that worked for me w/ IceHouse+Neutron+GRE on
Fedora-20 RDO.


  [1] https://ask.openstack.org/en/question/30014/openvswitch-module-verification-failed-signature-andor-required-key-missing-tainting-kernel/
  [2] http://kashyapc.fedorapeople.org/virt/openstack/rdo/IceHouse-Nova-Neutron-ML2-GRE-OVS.txt
 
> 
> When I go to look for br-tun I do 'ovs-vsctl show' and I'll *sometimes* see:
> 
>    ...
>         Bridge br-tun
>             Port br-tun
>                 Interface br-tun
>                     type: internal
>    ...
> 
> Now, this is kind of weird, but if I do "watch -n 0.5 ovs-vsctl show" I
> don't always see br-tun! In fact the br-tun seems to jump around a lot
> (sometimes its there, sometimes its listed above br-ex, sometimes below.)
> 
> More info:
> 
>    [root at localhost ~]# ovsdb-server --version
>    ovsdb-server (Open vSwitch) 1.11.0
>    Compiled Jul 30 2013 18:14:53
>    [root at localhost ~]# ovs-vswitchd --version
>    ovs-vswitchd (Open vSwitch) 1.11.0
>    Compiled Jul 30 2013 18:14:54
>    OpenFlow versions 0x1:0x1
> 
> 
> Any help would be appreciated.
> 

-- 
/kashyap