A Flask template on Docker with uWSGI & Nginx

Using the following repo:

• Flask Template: https://github.com/sloria/cookiecutter-flask
• Docker with uWSGI & Nginx: https://github.com/tiangolo/uwsgi-nginx-flask-docker

If you create a flask template with cookiecutter-flask, you basically need to copy five files and edit as you need.

• Dockerfile
• nginx.conf
• uwsgi.ini
• start_docker.py
• init_docker.sh

Quickstart (http://localhost:5000)

conda create -n py35env python=3.5
source activate py35env
git clone https://github.com/otwn/flask-on-docker
cd flask-on-docker
pip install -r requirements.txt
bower install

Then run the following commands

export FLASK_APP=/path/to/autoapp.py
export FLASK_DEBUG=1
flask run

Quickstart (http://localhost:8000)

The same flask application will run on docker in port 8000.

./init_docker.sh

Configuration

1. Access MongoDB on “host” machine from Docker.

Pymongo is installed and added pymongo settings on main/public/views.py. Change MONGODB_HOST. It should be your host machine’s ip address.

# MongoDB Connection
from pymongo import MongoClient
import json
from bson import json_util
from bson.json_util import dumps
MONGODB_HOST = 'Your Host IP address'
MONGODB_PORT = 27017
def get_db():
    c = MongoClient(MONGODB_HOST, MONGODB_PORT)
    return c.yourdatabase

1. Run Apache on Host and access the flask app on Docker by ProxyPass

• Apache 2.4 proxy.conf
  ```
  ProxyPreserveHost On
  Require all granted
  

ProxyPass /flask/ http://localhost:8000/
ProxyPassReverse /flask/ http://localhost/flask/
```
We can show the Flask app on Docker via proxy.

To change the subdirectory name, replace ‘flask’ by ‘your_subdirectory’ from the following files

• proxy.conf
• start_docker.py

Troubleshooting

• 403 Forbidden - Check permission of a directory/file
• 502 Bad Gateway - Check a file name. Even a difference jQuery/ and jquery/ on asset.py would show a 502 error.