I've been struggling with an ostensibly simple error while trying to deploy a Flask app on AWS Elastic Beanstalk for quite some time now. Launching the app gives a 502 Bad Gateway error. The traceback in the logs reads:
Traceback (most recent call last):
File "/var/app/venv/staging-LQM1lest/lib/python3.7/site-packages/gunicorn/arbiter.py", line 589, in spawn_worker
worker.init_process()
File "/var/app/venv/staging-LQM1lest/lib/python3.7/site-packages/gunicorn/workers/gthread.py", line 92, in init_process
super().init_process()
File "/var/app/venv/staging-LQM1lest/lib/python3.7/site-packages/gunicorn/workers/base.py", line 134, in init_process
self.load_wsgi()
File "/var/app/venv/staging-LQM1lest/lib/python3.7/site-packages/gunicorn/workers/base.py", line 146, in load_wsgi
self.wsgi = self.app.wsgi()
File "/var/app/venv/staging-LQM1lest/lib/python3.7/site-packages/gunicorn/app/base.py", line 67, in wsgi
self.callable = self.load()
File "/var/app/venv/staging-LQM1lest/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 58, in load
return self.load_wsgiapp()
File "/var/app/venv/staging-LQM1lest/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 48, in load_wsgiapp
return util.import_app(self.app_uri)
File "/var/app/venv/staging-LQM1lest/lib/python3.7/site-packages/gunicorn/util.py", line 359, in import_app
mod = importlib.import_module(module)
File "/usr/lib64/python3.7/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 965, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'application'
My flask app, in application.py, is as simple as it gets:
from flask import Flask
from flask import render_template
application = app = Flask(__name__)
if __name__ == "__main__":
application.run()
@application.route("/")
def index():
return render_template('index.html', name=None)
As is my directory structure. I upload ball.zip which contains:
ball/
application.py
requirements.txt
static/
templates/
The application is using Python 3.7 run on 64bit Amazon Linux 2/3.3.9. I've also checked that the configuration variable WSGIPath is set to application. Does anyone have any pointers on fixing this? Thanks!
You should not have folder "ball" in your zip. Every file should be in the root of the zip, not in the folder "ball".