Deploying Flask App in AWS Elastic Beanstalk

Question

when I deploy my flask app, it says successful but when I retrieve the logs, I see the error "Flask not found". I have flask in my requirements file. Any help.

[Sat Jan 11 06:51:50.503908 2020] [:error] [pid 3393] [remote 127.0.0.1:0] mod_wsgi (pid=3393): Target WSGI script '/opt/python/current/app/application.py' cannot be loaded as Python module.

[Sat Jan 11 06:51:50.503953 2020] [:error] [pid 3393] [remote 127.0.0.1:0] mod_wsgi (pid=3393): Exception occurred processing WSGI script '/opt/python/current/app/application.py'.

[Sat Jan 11 06:51:50.504123 2020] [:error] [pid 3393] [remote 127.0.0.1:0] Traceback (most recent call last): [Sat Jan 11 06:51:50.504151 2020] [:error] [pid 3393] [remote 127.0.0.1:0] File "/opt/python/current/app/application.py", line 1, in [Sat Jan 11 06:51:50.504156 2020] [:error] [pid 3393] [remote 127.0.0.1:0] from flask import Flask

[Sat Jan 11 06:51:50.504170 2020] [:error] [pid 3393] [remote 127.0.0.1:0] ModuleNotFoundError: No module named 'flask'.

Below is my application.py content

from flask import Flask
from myapp import create_app

application = create_app()

if __name__ == "__main__":
    application.run()

Below is the content of my requirements.txt

Click==7.0
-e git+https://github.com/xxxxxx/xxx.git@xxxx#egg=xxx
Flask==1.1.1
itsdangerous==1.1.0
Jinja2==2.10.3
MarkupSafe==1.1.1
numpy==1.18.1
PyYAML==3.13
scipy==1.4.1
Werkzeug==0.16.0

are you sure that you have the requirements.txt getting deployed, you can download the deployed zip and check — Arun K
Goto Elastic beans talk console => select the app => select the application versions on the left , it should show you the link to download the zip file — Arun K

AWS PS AWS PS · Accepted Answer · 2020-01-11T21:42:22

can you try renaming the Flask object that you run to 'application':

from flask import Flask
application = Flask(__name__)
# run the app.
if __name__ == "__main__":
    application.run()

From the Amazon EB Docs:

Using application.py as the filename and providing a callable application object (the Flask object, in this case) allows AWS Elastic Beanstalk to easily find your application's code.

Deploying Flask App in AWS Elastic Beanstalk

2 Answers