Open Stack

The outcome of the “Should Oslo continue to use alpha versions” session at the summit [1] was unclear, so I would like to continue the discussion here.

As we discussed at the summit, the primary reason for marking Oslo library releases as alphas was to indicate that the library is under development and not “stable”, so it should not be included in a deployment using stable branches. 

I think we were very close to being able to say that Oslo could stop using Alpha versions for new library releases because we would pin the versions of libraries used in the stable branches to MAJOR.MINOR+1 to only allow bug-fix releases to appear in deployments using those branches. However, we will not (and perhaps cannot) pin the versions of client libraries, and some of the clients are now using oslo.utils and potentially other oslo libraries. This would either break the clients (if they used a feature of an oslo library not in the version of the library supported by the server) or the server (if the oslo library is upgraded and a setuptools requirements check notices or some feature has been removed from the oslo library).

We came to this realization just as we were running out of time for the session, so we did not come up with a solution. I wasn’t able to attend the stable branch session, so I am hoping that someone who was there will be able to explain a bit about the version pinning discussion and how that may, or may not, affect Oslo library versioning.

Doug


[1] https://etherpad.openstack.org/p/kilo-oslo-alpha-versioning