One of the goals for Pike [1] is to make each API service be able to
run under web servers that support WSGI applications,
such as Apache (+mod-wsgi) and Nginx (+uWSGI).
Do following to address governance requirements:
- Split existing manila/wsgi.py module into 3 modules:
First (manila/wsgi/eventlet_server.py) is used by
eventlet-based WSGI application approach.
Second (manila/wsgi/wsgi.py) is used for WSGI web servers.
And third (manila/wsgi/common.py) is common code for both.
All three are made in cinder-like way to have alike-approach.
- Reuse common code from "oslo_service/wsgi.py" module that
allows us to remove code duplication.
- Delete config opts that are defined by newly reused common code.
- Register new entry point that will be manila wsgi app: "manila-wsgi".
- Fix "manila/api/openstack/wsgi.py" module to be compatible
with str/bytes handling approach used by Apache mod-wsgi plugin using
different python versions (2/3).
- Add web server config template "devstack/apache-manila.template"
- Add devstack support where usage of this feature can be
enabled or disabled using "MANILA_USE_MOD_WSGI" env var.
It is set to "True" by default, because it is requirement for Pike
release - to have it running in all CI jobs.
Disable it only for one CI job that uses dummy driver and tests
various manila core features that are not covered by other CI jobs.
[1] https://governance.openstack.org/tc/goals/pike/deploy-api-in-wsgi.html
Partially-Implements BluePrint wsgi-web-servers-support
DocImpact
Change-Id: Ibdef3c6810b65a5d6f3611e2d0079c635ee523ab
16bfc82962