[all][tc] Planning for dropping the Python2 support in OpenStack
On Thu, Oct 24, 2019 at 3:58 PM Ghanshyam Mann <gmann at ghanshyammann.com>
> ---- On Thu, 24 Oct 2019 16:57:55 -0500 Jeremy Stanley <fungi at yuggoth.org>
> wrote ----
> > On 2019-10-24 14:32:03 -0500 (-0500), Ghanshyam Mann wrote:
> > [...]
> > > - Projects can start dropping the py2.7 support. Common lib and
> > > testing tools need to wait until milestone-2.
> > [...]
> > This doesn't match the intent behind what I originally suggested nor
> > my subsequent interpretation of what we discussed, and unfortunately
> > the plan on the etherpad is slightly vague here too. I thought what
> > we were agreeing to was that leaf projects (services and the like)
> > had *until* milestone 1 (~2019-12-12) to remove Python 2.7 testing
> > if they depend on shared libraries which are planning to remove
> > support for it in Ussuri. From then until milestone 2 (~2020-02-13)
> > shared libraries could work on dropping support for Python 2.7. If
> > libs are allowed to drop support for it *after* milestone 2 then
> > that doesn't leave much time before they're released at milestone 3
> > to stabilize or reverse course.
> > > Phase-1: Dec 09 - Dec 13 R-22 Ussuri-1 milestone
> > > ** Project to start dropping the py2 support along with all the
> > > py2 CI jobs.
> > This is a milestone later than I expected, unless you mean they
> > should be done by this point. It's just about removing jobs, so
> > projects should be on the ball and do this quickly.
> > > Phase-2: Feb 10 - Feb 14 R-13 Ussuri-2 milestone
> > > ** This includes Oslo, QA tools (or any other testing tools),
> > > common lib (os-brick), Client library.
> > > ** This will give enough time to projects to drop the py2
> > > support.
> > This leaves less than 2 months where libraries are allowed to
> > complete the necessary work before they get released for Ussuri
> > (remember the final release for libraries is at R-6, the week before
> > milestone 3).
> > > Phase-3: Apr 06 - Apr 10 R-5 Ussuri-3 milestone
> > > ** Final audit on Phase-1 and Phase-2 plan and make sure
> > > everything is done without breaking anything. This is enough
> > > time to measure such break or anything extra to do before ussuri
> > > final release.
> > [...]
> > Libraries are released the week before this, so no, that doesn't
> > really provide any auditing opportunity.
> Sorry for the confusion in the schedule. Below one is what I meant.
> Phase-1: Now -> Ussuri-1 milestone (deadline R-22 )
> ** Project to dropping the py2 support along with all the py2 CI jobs.
> Phase-2: milestone-1 -> milestone-2 ( deadline R-13 )
> ** This includes Oslo, QA tools (or any other testing tools), common lib
> (os-brick), Client library.
> Phase-3: at milestone-2
> ** Final audit on Phase-1 and Phase-2 plan and make sure everything is
> done without breaking anything.
> This is enough time to measure such a break or anything extra to do
> before Ussuri final release.
Awesome, thank you for stating this very clearly. For OpenStack manila,
I've lined up the patches like you've indicated:
Phase-1: Now -> Ussuri-1 milestone (deadline R-22 )
** openstack/manila will drop support for python2.7:
Phase-2: milestone-1 -> milestone-2 ( deadline R-13 )
** Client projects and tempest plugin will drop support for python2.7:
Phase-3: at milestone-2
** Final audit on Phase-1 and Phase-2 plan and make sure everything is done
without breaking anything.
I'm using the Gerrit topic "drop-py2" to track these.
> > I apologize, in retrospect I realize that the distinction between
> > "by" and "at" in English could be too subtle for a lot of folks to
> > pick up on, and I should have been more explicit in my original
> > proposal.
> > --
> > Jeremy Stanley
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