Open Stack

----- Original Message -----
> From: "Tom Fifield" <tom at openstack.org>
> To: openstack-docs at lists.openstack.org
> Sent: Friday, July 26, 2013 1:26:01 PM
> Subject: Re: [Openstack-docs] Intro and example installations
> 
> On 19/07/13 13:22, Anne Gentle wrote:
> >     2) Isn't nova-network slated to be deprecated in Havana (
> >     https://blueprints.launchpad.net/nova/+spec/deprecate-nova-network )?
> > 
> > 
> > Yes but neutron is not yet an acceptable replacement, nor do we know if
> > it will be in Havana. So my guess is that the work to deprecate
> > nova-network will be delayed again. I don't know this for certain,
> > though, so the safest thing for docs to do is to have the
> > easiest/simplest still use nova-networks. Happy to
> > hear dissension around this point but with lack of HA in L3 plus major
> > complexity of SDN I just don't think it's right to use neutron for the
> > simplest install.
> 
> Nova-network was slated to be deprecated in Havana, but this has change
> and will now happen in Ice House, with potential removal in J release.
> Therefore, I personally still consider it a very valid option for an
> architecture :)

My suggestion is not that nova-network isn't a valid option but my main concerns/feelings are that:

1) We have the opportunity here to steer new deployers past what is still looking like a fairly involved migration path when nova-network actually is removed (regardless of timing).

2) Software Defined Networking is by its nature a conceptually different way of thinking about networking in the data center. As such while the implementation of it in OpenStack (neutron) will likely get somewhat friendlier (and various issues like HA of the L3 agent will be addressed*) as it is bedded down I don't think that central element of conceptual complexity that will eventually need to explained is necessarily going away.

3) Somewhat related to (1) bolting neutron on as a choose your own adventure component is possibly going to be more difficult than installing it in the first place ;).

Just my 2c.

Thanks,

Steve

* https://blueprints.launchpad.net/neutron/+spec/quantum-multihost