wsgi.py is missing

[Adrian Turjak]

Horizon was likely started very early along with Django, and thus has the old format wsgi file as "django.wsgi".
https://github.com/openstack/horizon/tree/master/openstack_dashboard/wsgi

This is not how django names this file anymore, nor how it is really used.

https://stackoverflow.com/questions/20035252/difference-between-wsgi-py-and-django-wsgi
https://docs.djangoproject.com/en/1.11/howto/deployment/wsgi/modwsgi/

The expectation is having a wsgi.py file somewhere along your importable python path. Normally this is in the same place as your settings.py file when building a default django project.

Ideally we should rename and move the file to a place it is easier to import from:
horizon/openstack_dashboard/wsgi/django.wsgi horizon/openstack_dashboard/wsgi.py

gunicorn cannot import and run it because it isn't a '.py' file, and is one of the most popular wsgi servers around.

By doing the above move and rename the file can now be imported and run as:
gunicorn openstack_dashboard.wsgi:application

NOTE: This will likely break anyone using it right now. We may instead want to copy the file to the new location and add a deprecation log into the old one with a notice to remove in 2 cycles. Ideally also document that deployers should be using the new file.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/561802

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/561802
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=0ca736e5da47413db6749053e6083b82cbb24825
Submitter: Zuul
Branch: master

commit 0ca736e5da47413db6749053e6083b82cbb24825
Author: Adrian Turjak <email address hidden>
Date: Tue Apr 17 18:27:27 2018 +1200

    Create new wsgi.py file and deprecate old file

    Django 1.4 stopped creating django.wsgi files and the common
    practice now for a while has been a wsgi.py since it is actually
    python code, and should actually be importable.

    Right now someone has to copy and rename the existing file if they
    want to use it with a server like gunicorn.

    This patch adds a new file in location that is importable via python
    and adds a deprecation log to the old one.

    This also updates the wsgi generation commands to instead create
    'horizon_wsgi.py' and have the apache conf generation also use that
    or the default wsgi file.

    Change-Id: I0f8bd16c8973ad23bcd8f73b54584dc69e5aed0c
    Closes-Bug: #1763204

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/horizon 14.0.0.0b2 development milestone.