[openstack-dev] [Horizon] dependency on non-standardized, private APIs

Rishi Raj Singh rishiraj.devel at gmail.com
Fri Mar 13 14:49:30 UTC 2015

On Mar 3, 2015 8:30 PM, "Radoslaw Zarzynski" <rzarzynski at mirantis.com>

> Guys,
> I would like discuss a problem which can be seen in Horizon: breaking
> the boundaries of public, well-specified Object Storage API in favour
> of utilizing a Swift-specific extensions. Ticket #1297173 [1] may serve
> as a good example of such violation. It is about relying on
> non-standard (in the terms of OpenStack Object Storage API v1) and
> undocumented HTTP header provided by Swift. In order to make
> Ceph RADOS Gateway work correctly with Horizon, developers had to
> inspect sources of Swift and implement the same behaviour.
> From my perspective, that practise breaks the the mission of OpenStack
> which is much more than delivering yet another IaaS/PaaS implementation.
> I think its main goal is to provide a universal set of APIs covering all
> functional areas relevant for cloud computing, and to place that set
> of APIs in front as many implementations as possible. Having an open
> source reference implementation of a particular API is required to prove
> its viability, but is secondary to having an open and documented API.
> I have full understanding that situations where the public OpenStack
> interfaces are insufficient to get the work done might exist.
> However, introduction of dependency on implementation-specific feature
> (especially without giving the users a choice via e.g. some
> configuration option) is not the proper way to deal with the problem.
> From my point of view, such cases should be handled with adoption of
> new, carefully designed and documented version of the given API.
> In any case I think that Horizon, at least basic functionality, should
> work with any storage which provides Object Storage API.
> That being said, I'm willing to contribute such patches, if we decide
> to go that way.
> Best regards,
> Radoslaw Zarzynski
> [1] https://bugs.launchpad.net/horizon/+bug/1297173
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