Deploying a Django application to Heroku - No module named 'django_project.wsgi

Question

I'm trying to deploy a django application but I keep getting this error:

ModuleNotFoundError: No module named 'django_project.wsgi'

In fact, here's the full log:

2022-05-13T14:52:06.436735+00:00 app[web.1]: Traceback (most recent call last):
2022-05-13T14:52:06.436735+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/gunicorn/arbiter.py", line 589, in spawn_worker
2022-05-13T14:52:06.436736+00:00 app[web.1]: worker.init_process()
2022-05-13T14:52:06.436736+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/gunicorn/workers/base.py", line 134, in init_process
2022-05-13T14:52:06.436736+00:00 app[web.1]: self.load_wsgi()
2022-05-13T14:52:06.436737+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/gunicorn/workers/base.py", line 146, in load_wsgi
2022-05-13T14:52:06.436737+00:00 app[web.1]: self.wsgi = self.app.wsgi()
2022-05-13T14:52:06.436738+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/gunicorn/app/base.py", line 67, in wsgi
2022-05-13T14:52:06.436738+00:00 app[web.1]: self.callable = self.load()
2022-05-13T14:52:06.436738+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/gunicorn/app/wsgiapp.py", line 58, in load
2022-05-13T14:52:06.436740+00:00 app[web.1]: return self.load_wsgiapp()
2022-05-13T14:52:06.436740+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/gunicorn/app/wsgiapp.py", line 48, in load_wsgiapp
2022-05-13T14:52:06.436740+00:00 app[web.1]: return util.import_app(self.app_uri)
2022-05-13T14:52:06.436741+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/gunicorn/util.py", line 359, in import_app
2022-05-13T14:52:06.436741+00:00 app[web.1]: mod = importlib.import_module(module)
2022-05-13T14:52:06.436741+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/importlib/__init__.py", line 127, in import_module
2022-05-13T14:52:06.436742+00:00 app[web.1]: return _bootstrap._gcd_import(name[level:], package, level)
2022-05-13T14:52:06.436742+00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
2022-05-13T14:52:06.436742+00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
2022-05-13T14:52:06.436742+00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 984, in _find_and_load_unlocked
2022-05-13T14:52:06.436742+00:00 app[web.1]: ModuleNotFoundError: No module named 'django_project.wsgi'
2022-05-13T14:52:06.436801+00:00 app[web.1]: [2022-05-13 14:52:06 +0000] [10] [INFO] Worker exiting (pid: 10)
2022-05-13T14:52:06.442147+00:00 app[web.1]: [2022-05-13 14:52:06 +0000] [4] [WARNING] Worker with pid 10 was terminated due to signal 15
2022-05-13T14:52:06.541420+00:00 app[web.1]: [2022-05-13 14:52:06 +0000] [4] [INFO] Shutting down: Master
2022-05-13T14:52:06.541451+00:00 app[web.1]: [2022-05-13 14:52:06 +0000] [4] [INFO] Reason: Worker failed to boot.
2022-05-13T14:52:06.664571+00:00 heroku[web.1]: Process exited with status 3
2022-05-13T14:52:06.894647+00:00 heroku[web.1]: State changed from starting to crashed
2022-05-13T14:53:23.778808+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=django-blog-project-laila.herokuapp.com request_id=4a9f0381-627b-4770-9757-93a4faccfe7b fwd="168.195.253.168" dyno= connect=
 service= status=503 bytes= protocol=https
2022-05-13T14:53:23.928270+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=django-blog-project-laila.herokuapp.com request_id=d296d612-ff9c-4ac7-9abd-5742f13cbe8e fwd="168.195.253.168" dyn
o= connect= service= status=503 bytes= protocol=https
2022-05-13T14:53:24.335534+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=django-blog-project-laila.herokuapp.com request_id=a5ea86d2-d172-46cd-b77f-978bd1d46d46 fwd="168.195.253.168" dyn
o= connect= service= status=503 bytes= protocol=https
2022-05-13T14:53:25.238063+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=django-blog-project-laila.herokuapp.com request_id=1153847b-b0d6-4855-98a8-e4722958b03b fwd="168.195.253.168" dyn
o= connect= service= status=503 bytes= protocol=https
2022-05-13T14:52:06.000000+00:00 app[api]: Build succeeded

Here's my Procfile

web: gunicorn django_project.wsgi:application --log-file - --log-level debug
python manage.py collectstatic --noinput
manage.py migrate

On settings.py I have the following:

ALLOWED_HOSTS = [
    '127.0.0.1',
    'django-blog-project-laila.herokuapp.com'
]

MIDDLEWARE = [
    ...
    'whitenoise.middleware.WhiteNoiseMiddleware',
    ...
]

Here's my wsgi.py file:

os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'django_project.settings')

application = get_wsgi_application()

Here's my project strucure:

I've tried moving Procfile to the same folder as the manage.py file, but then heroku can't locate it.

Here's the log when Procfile is located at the same folder as manage.py:

2022-05-13T19:06:18.510757+00:00 app[web.1]: ModuleNotFoundError: No module named 'django_project.wsgi'
2022-05-13T19:06:18.510820+00:00 app[web.1]: [2022-05-13 19:06:18 +0000] [9] [INFO] Worker exiting (pid: 9)
2022-05-13T19:06:18.537201+00:00 app[web.1]: [2022-05-13 19:06:18 +0000] [4] [INFO] Shutting down: Master
2022-05-13T19:06:18.537230+00:00 app[web.1]: [2022-05-13 19:06:18 +0000] [4] [INFO] Reason: Worker failed to boot.
2022-05-13T19:06:18.730859+00:00 heroku[web.1]: Process exited with status 3
2022-05-13T19:06:18.869100+00:00 heroku[web.1]: State changed from starting to crashed
2022-05-13T19:56:41.000000+00:00 app[api]: Build started by user [email protected]
2022-05-13T19:57:21.664049+00:00 app[api]: Release v11 created by user [email protected]
2022-05-13T19:57:21.664049+00:00 app[api]: Deploy 699afe79 by user [email protected]
2022-05-13T19:57:21.837420+00:00 heroku[web.1]: State changed from crashed to down
2022-05-13T19:57:24.119910+00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=GET path="/" host=django-blog-project-laila.herokuapp.com request_id=6724bdc4-1598-4fb9-a657-59237254b687 fwd="168.195.253.168" d
yno= connect= service= status=503 bytes= protocol=https
2022-05-13T19:57:24.994965+00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=GET path="/favicon.ico" host=django-blog-project-laila.herokuapp.com request_id=0fb84b80-c136-409f-bb4d-7cf6b5f1d84f fwd="168.195
.253.168" dyno= connect= service= status=503 bytes= protocol=https
2022-05-13T19:57:33.000000+00:00 app[api]: Build succeeded
2022-05-13T19:57:40.582602+00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=GET path="/" host=django-blog-project-laila.herokuapp.com request_id=e5964c10-21ec-44ad-9440-c00503ac7752 fwd="168.195.253.168" d
yno= connect= service= status=503 bytes= protocol=https
2022-05-13T19:57:40.834565+00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=GET path="/favicon.ico" host=django-blog-project-laila.herokuapp.com request_id=9f8b5a5c-6dbb-49ba-bfc6-108121e48d91 fwd="168.195
.253.168" dyno= connect= service= status=503 bytes= protocol=https
2022-05-13T19:57:41.203156+00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=GET path="/favicon.ico" host=django-blog-project-laila.herokuapp.com request_id=bca40057-6e76-446b-8b84-a4c4a5bef659 fwd="168.195
.253.168" dyno= connect= service= status=503 bytes= protocol=https
2022-05-13T19:57:42.103394+00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=GET path="/favicon.ico" host=django-blog-project-laila.herokuapp.com request_id=04f4c4b0-940e-4c36-a62f-00d874f7f57a fwd="168.195
.253.168" dyno= connect= service= status=503 bytes= protocol=https

Edit: With Procfile still at manage.py folder, I've tried the command heroku local web to see if I can run it locally. But I get the following error:

[WARN] ENOENT: no such file or directory, open 'Procfile'
[FAIL] No Procfile and no package.json file found in Current Directory - See run-foreman.js --help

I've tried changing Procfile to the following:

web:gunicorn django_project.wsgi --log-file -

But nothing.

Tried running heroku local web with Procfile in the same level as my git repository (which I'm refering to as the root directory, which is one level above my manage.py file) but same error:

[WARN] ENOENT: no such file or directory, open 'Procfile'
[FAIL] No Procfile and no package.json file found in Current Directory - See run-foreman.js --help

What am I doing wrong? Any help is appreciated. Thank you.

Answer 1

With Procfile at the root directory (that is, one level above manage.py), I've changed its content to the following:

web: gunicorn --pythonpath django_project django_project.wsgi --log-file -

As per this answer.

Here's my project structure now, just in case it wasn't clear where Procfile is located:

Now everything works as it should.

I'm marking this question as solved.

Answer 2

Add runtime.txt with your python version

runtime.txt

python-"your version"

and run

pip freeze > requirements.txt

Answer 3

First off, make sure your Procfile, requirements.txt & runtime.txt files are in the same folder as the manage.py file.

Your Procfile should read as follows: web:gunicorn django_project.wsgi --log-file -

Your runtime.txt should read as follows: python-versionnumber. e.g. python-3.10.2

Your requirements.txt file is necessary as it helps heroku resolve and install packages used in your project. Run pip freeze > requirements.txt