[openstack-dev] About multihost patch review

Edgar Magana emagana at plumgrid.com
Mon Aug 26 23:06:28 UTC 2013

Hi Developers,

Let me explain my point of view on this topic and please share your thoughts
in order to merge this new feature ASAP.

My understanding is that multi-host is nova-network HA  and we are
implementing this bp
https://blueprints.launchpad.net/neutron/+spec/quantum-multihost for the
same reason.
So, If in neutron configuration admin enables multi-host:

# Support multi host networks
# enable_multihost = False

Why do tenants needs to be aware of this? They should just create networks
in the way they normally do and not by adding the "multihost" extension.
I could be totally wrong and crazy, so please provide some feedback.



From:  Yongsheng Gong <gongysh at unitedstack.com>
Date:  Monday, August 26, 2013 2:58 PM
To:  "Kyle Mestery (kmestery)" <kmestery at cisco.com>, Aaron Rosen
<arosen at nicira.com>, Armando Migliaccio <amigliaccio at vmware.com>, Akihiro
MOTOKI <amotoki at gmail.com>, Edgar Magana <emagana at plumgrid.com>, Maru Newby
<marun at redhat.com>, Nachi Ueno <nachi at nttmcl.com>, Salvatore Orlando
<sorlando at nicira.com>, Sumit Naiksatam <sumit.naiksatam at bigswitch.com>, Mark
McClain <mark.mcclain at dreamhost.com>, Gary Kotton <gkotton at vmware.com>,
Robert Kukura <rkukura at redhat.com>
Cc:  OpenStack List <openstack-dev at lists.openstack.org>
Subject:  Re: About multihost patch review

Edgar Magana has commented to say:
'This is the part that for me is confusing and I will need some
clarification from the community. Do we expect to have the multi-host
feature as an extension or something that will natural work as long as the
deployment include more than one Network Node. In my opinion, Neutron
deployments with more than one Network Node by default should call DHCP
agents in all those nodes without the need to use an extension. If the
community has decided to do this by extensions, then I am fine' at

I have commented back, what is your opinion about it?

Yong Sheng Gong

On Fri, Aug 16, 2013 at 9:28 PM, Kyle Mestery (kmestery)
<kmestery at cisco.com> wrote:
> Hi Yong:
> I'll review this and try it out today.
> Thanks,
> Kyle
> On Aug 15, 2013, at 10:01 PM, Yongsheng Gong <gongysh at unitedstack.com> wrote:
>> > The multihost patch is there for a long long time, can someone help to
>> review?
>> > https://review.openstack.org/#/c/37919/

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