[openstack-dev] [all][tc][ptls][glance] final stages of python 3 transition
doug at doughellmann.com
Tue May 8 19:02:05 UTC 2018
Excerpts from Matthew Treinish's message of 2018-05-08 13:55:43 -0400:
> On Tue, May 08, 2018 at 01:34:11PM -0400, Doug Hellmann wrote:
> > (added [glance] subject tag)
> > Excerpts from Matthew Treinish's message of 2018-05-08 12:22:56 -0400:
> > > On Tue, May 08, 2018 at 05:01:36PM +0100, Graham Hayes wrote:
> > > > On 08/05/18 16:53, Doug Hellmann wrote:
> > > > > Excerpts from Graham Hayes's message of 2018-05-08 16:28:46 +0100:
> > > > Glance - Has issues with image upload + uwsgi + eventlet 
> > >
> > > This actually is a bit misleading. Glance works fine with image upload and uwsgi.
> > > That's the only configuration of glance in a wsgi app that works because
> > > of chunked transfer encoding not being in the WSGI protocol.  uwsgi provides
> > > an alternate interface to read chunked requests which enables this to work.
> > > If you look at the bugs linked off that release note about image upload
> > > you'll see they're all fixed.
> > Is this documented somewhere?
> The wsgi limitation or the glance usage? I wrote up a doc about running under
> apache when I added the uwsgi chunked transfer encoding support to glance about
> running glance under apache here:
> Which includes how you have to configure things to get it working and a section
> on why mod_wsgi doesn't work.
I meant the glance usage so it sounds like you've covered the docs
for that. Thanks!
> > > The issues glance has with running in a wsgi app are related to it's use of
> > > async tasks via taskflow. (which includes the tasks api and image import stuff)
> > > This shouldn't be hard to fix, and I've had patches up to address these for
> > > months:
> > >
> > > https://review.openstack.org/#/c/531498/
> > > https://review.openstack.org/#/c/549743/
> > >
> > > Part of the issue is that there is no api driven testing for these async api
> > > functions or any documented way to test them. Which is why I marked the 2nd
> > > one WIP, since I have no method to test it and after asking several times
> > > for a test case or some other method to validate these APIs without an answer.
> > It would be helpful if some of this detail made its way into the glance
> > section of https://wiki.openstack.org/wiki/Python3#Python_3_Status_of_OpenStack_projects
> It really doesn't have anything to do with Python 3 though since the bug with
> glance's taskflow usage is on both py2 and py3. In fact we're already running
> glance under uwsgi in the gate with python 3 today for the dsvm py3 jobs. The
> reason these bugs haven't come up there is because there is no test coverage
> for any of these async APIs. But I can add it to the wiki later today.
Will it block us from moving glance to python 3 if we drop the WSGI
code from oslo.service so that the only way to deploy is behind
some other WSGI server?
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