openstack team mailing list archive

[Russell Bryant <rbryant@xxxxxxxxxx>]

Yes, I'm interested in that as well.  I found this blueprint:


https://blueprints.launchpad.net/nova/+spec/formalized-message-structures

And these notes on etherpad:

    http://etherpad.openstack.org/formalized-message-structure

I proposed a session to discuss this a bit at the summit:

    http://summit.openstack.org/sessions/view/95

There are a lot of ways this could be approached.  I'm going to try to
write up a proposal at some point to get a discussion moving.

-- 
Russell Bryant

On 04/03/2012 05:42 AM, John Garbutt wrote:
> +1 for move to nova.common
> 
> I remember discussion about versioning these messages to aid rolling / zero-downtime upgrades.
> 
> Might be worth considering those when doing the decoupling?
> 
> Cheers,
> John
> 
>> -----Original Message-----
>> From: openstack-bounces+john.garbutt=eu.citrix.com@xxxxxxxxxxxxxxxxxxx
>> [mailto:openstack-bounces+john.garbutt=eu.citrix.com@xxxxxxxxxxxxxxxxxxx]
>> On Behalf Of Chris Behrens
>> Sent: 02 April 2012 23:53
>> To: Russell Bryant
>> Cc: Duncan McGreggor; openstack@xxxxxxxxxxxxxxxxxxx; Chris Behrens
>> Subject: Re: [Openstack] Moving nova.rpc into openstack.common
>>
>> Awesome, thanks :)
>>
>> On Apr 2, 2012, at 3:46 PM, Russell Bryant wrote:
>>
>>> I just threw up a patch a little while ago:
>>>
>>> https://review.openstack.org/6119
>>>
>>> --
>>> Russell Bryant
>>>
>>> On 04/02/2012 06:37 PM, Chris Behrens wrote:
>>>> Seems like a sensible plan.  Carrot can go now.  I marked it deprecated so
>> we can remove in folsom.  I can take care of this today, even.
>>>>
>>>> On Apr 2, 2012, at 3:02 PM, Duncan McGreggor <duncan@xxxxxxxxxxxxx>
>> wrote:
>>>>
>>>>> +1
>>>>>
>>>>> Thanks for exploring this, Russell!
>>>>>
>>>>> Next step: getting a common REST API abstraction in place that all
>>>>> the projects can use... ;-)
>>>>>
>>>>> d
>>>>>
>>>>> On Mon, Apr 2, 2012 at 4:26 PM, Russell Bryant <rbryant@xxxxxxxxxx>
>> wrote:
>>>>>> Greetings,
>>>>>>
>>>>>> There was a thread on this list a little while ago about moving the
>>>>>> notification drivers that are in nova and glance into
>>>>>> openstack.common since they provide very similar functionality, but
>>>>>> have implementations that have diverged over time.  Is anyone
>>>>>> actively working on this?  If so, please let me know.
>>>>>>
>>>>>> For the message queue notifiers, nova uses nova.rpc to do the heavy
>>>>>> lifting.  Glance has notifiers written against the messaging libs
>>>>>> directly.  I think it makes sense to take the nova approach.  This
>>>>>> would mean moving nova.rpc into openstack.common before the
>>>>>> notifiers can get moved.
>>>>>>
>>>>>> I have started looking at moving nova.rpc to openstack.common.rpc.
>>>>>> My plan is:
>>>>>>
>>>>>> 1) Write a series of patches that reduces coupling in nova.rpc on
>>>>>> the rest of nova.
>>>>>>
>>>>>> 2) Submit changes needed to support this decoupling to
>> openstack.common.
>>>>>>
>>>>>> 3) Once nova.rpc is sufficiently decoupled, move it to
>> openstack.common.
>>>>>>
>>>>>> While doing the above, I want to aim for the least amount of
>>>>>> disruption to the rpc interface as is practical.
>>>>>>
>>>>>> While we're at it, is it time to drop nova.rpc.impl_carrot?  It is
>>>>>> marked as deprecated in Essex.  Is there any reason anyone would
>>>>>> still use impl_carrot over impl_kombu?
>>>>>>
>>>>>> Thoughts?
>>>>>>
>>>>>> Thanks,
>>>>>>
>>>>>> --
>>>>>> Russell Bryant
>>>>>>
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