Open Stack

These are few notes I had for Linux bridge config on neutron in initial Havana release. Hope this helps!
Arindam

From: BYEONG-GI KIM [mailto:kimbyeonggi at gmail.com]
Sent: Tuesday, May 26, 2015 12:09 AM
To: Martinx - ジェームズ; openstack at lists.openstack.org
Subject: Re: [Openstack] Documentation for Neutron L3 / VXLAN with LinuxBridge...

Hello.

I'm looking for the way of LinuxBridge setup for openstack neutron networking instead of ML2 VLAN/VXLAN/GRE like your reason, and you seems successfully deployed the environment.

Could you give me any advice for the deployment?

I'm now deploying openstack 3 nodes (actually, I attached another compute, so my current deployment setup is 4nodes, i.e., 1 controller, 1 network, and 2 computes) by following the openstack installation guide, http://docs.openstack.org/kilo/install-guide/install/yum/content/neutron-controller-node.html. I think several options in /etc/nova/nova.conf, /etc/neutron/plugins/ml2/ml2_conf.ini and /etc/neutron/neutron.conf should be modifed properly in order to use LinuxBridge instead of OVS.

Here are the lists what I know to modify:

1. /etc/neutron/neutron.conf on controller
core_plugin = ml2 (I think this should be modified but I don't know what parameter indicates Linux Bridge Agent Plugin)

2. /etc/neutron/plugins/ml2/ml2_conf.ini on controller
Do I still need to modify this file? I'm confused, because the file name is 'ml2', which is for ml2 plugin not for 'linux bridge'... And, I wonder the lists should be modified.

Thank you in advance!

Regards

Byeong-Gi KIM




2015-04-21 7:19 GMT+09:00 Martinx - ジェームズ <thiagocmartinsc at gmail.com<mailto:thiagocmartinsc at gmail.com>>:
Hi James!

On 20 April 2015 at 18:16, James Denton <james.denton at rackspace.com<mailto:james.denton at rackspace.com>> wrote:
Hi Thiago,

VXLAN requires an IP address on each host from which to build the overlay mesh between hosts. Some choose to use a dedicated interface/IP/VLAN for this, but its not required.

Sure, I'm aware of that.

What is new for me, is that when using "VXLAN + OpenvSwitch", plains VLANs are not required but, when using "VXLAN + LinuxBridges", then, you'll need plain VLANs as well (and this is new for me).


As for ‘vconfig’ missing - It appears that the 'ip link’ command (iproute2) is being used instead to create vlan interfaces.

Okay, cool! I'll take a look on that.

Thank you!


James

Thiago


On Apr 17, 2015, at 10:26 PM, Martinx - ジェームズ <thiagocmartinsc at gmail.com<mailto:thiagocmartinsc at gmail.com>> wrote:

Perfect! I followed the Juno documentation here:

http://docs.openstack.org/juno/install-guide/install/apt/content/ch_preface.html

But I have "VXLAN + LinuxBridges", instead of "GRE + OVS", pretty cool!

I was doing it wrong (of course), I did not realized that VXLAN with LinuxBridges, required plain VLANs to work (Is that right?)...

Nevertheless, I still do not fully understand this setup, since the "vlan" package and its "vconfig" binary, is not even installed at my Network Node, also, there is nothing at my "/proc/net/vlan...".

So, how it is working?  lol

Good challenge for the weekend to figure this out!   ^_^

Cheers!
Thiago

On 17 April 2015 at 23:30, Martinx - ジェームズ <thiagocmartinsc at gmail.com<mailto:thiagocmartinsc at gmail.com>> wrote:
BTW, I just found this:

https://github.com/madorn/vagrant-juno-linuxbridge-vxlan-vlan

The problem is that it is for VirtualBox or VMWare, and I'm using exclusively KVM these days...   :-/

But, I believe it will help me anyway...   =P

On 17 April 2015 at 22:01, Martinx - ジェームズ <thiagocmartinsc at gmail.com<mailto:thiagocmartinsc at gmail.com>> wrote:
Hey guys,

 Where can I find a complete documentation to make use of LinuxBridges, instead of OpenvSwitch, when using it with VXLAN?

 I faced too many problems with OVS in the past (also these days) and now, even Rackspace deploys their RPC v9 and v10 with LinuxBridges but, where are the documents?

 I'm reading now, the following  Ansible files, to try to figure this out:

 https://github.com/stackforge/os-ansible-deployment

 But, this isn't a documentation...   :-P

 The current Juno documents only explain GRE + OVS but, this setup is unstable and slow.

Cheers!
Thiago


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