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Re: OpenStack Compute API for Cactus (critical!)


Hi Erik, today we have compute, block/volume, and network all encompassed in
nova. Along with image and object storage these make the whole of OpenStack
today. The goal is to see where we are at wrt the OpenStack API
(compute/network/volume/image) and coverage of the underlying implementation
as well as what is available through the EC2 API today.


I would propose that volume and network API's be exposed not through the
core compute API, but as extensions. Once we create separate services and
factor network and volume services out of nova these API's will form the
core API's for these services. We may also need to up-version these service
API's between Cactus and Diablo as they are currently under heavy discussion
and design.




From: Erik Carlin [mailto:erik.carlin@xxxxxxxxxxxxx] 
Sent: Monday, February 28, 2011 3:16 PM
To: John Purrier; openstack@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Openstack] OpenStack Compute API for Cactus (critical!)


John -


Are we just talking about compute aspects?  IMO, we should NOT be exposing
block functionality in the OS compute API.  In Diablo, we will break out
block into a separate service with it's own OS block API.  That means for
now, there may be functionality in nova that isn't exposed (an artifact of
originally mimicing EC2) until we can fully decompose nova into independent




From: John Purrier <john@xxxxxxxxxxxxx>
Date: Mon, 28 Feb 2011 14:16:20 -0600
To: <openstack@xxxxxxxxxxxxxxxxxxx>
Subject: [Openstack] OpenStack Compute API for Cactus (critical!)


Has anyone done a gap analysis against the proposed OpenStack Compute API
and a) the implemented code, and b) the EC2 API?


It looks like we have had a breakdown in process, as the community review
process of the proposed spec has not generated discussion of the missing
aspects of the proposed spec. 


Here is what we said on Feb 3 as the goal for Cactus:


OpenStack Compute API completed. We need to complete a working set of API's
that are consistent and inclusive of all the exposed functionality.


We need to *very* quickly identify the missing elements that are required in
the OpenStack Compute API, and then discuss how we mobilize to get this work
done for Cactus. As this is the #1 priority for this release there are
implications on milestones dates depending on the results of this exercise.
The 1.1 spec should be complete and expose all current Nova functionality
(superset of EC2/RS). 


Dendrobates, please take the lead on this, anyone who can help please
coordinate with Rick. Can we get a fairly complete view by EOD tomorrow?
Please set up a wiki page to identify the gaps, I suggest 3 columns (Actual
code / EC2 / OpenStack Compute).





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