ubuntu-flask-gunicorn-nginx-docker-compose

Scaled Python Flask App with NGINX using Multiple Containers with Docker Compose

Contents

• Ubuntu 18.04
• Python 3.7.3
• Flask 1.0.3
• NGINX 1.17.1
• Werkzeug 0.15.4
• Gunicorn 19.9.0
• Example "Hello World" Flask App

Build and start your containers with Docker Compose

Run this command in the directory that has your docker-compose.yml

docker-compose up --build --detach

Testing

If you didn't modify the example code you should be able to go to localhost port 80 in a browser and get a red "Hello World" message

Notes

• --shm-size is to set a bigger shared memory size. Gunicorn has a config entry to use shared memory (/dev/shm) vs disk (/tmp) for health checks to avoid timeouts.
• In the /home/ubuntu you can see all the files for Flask as well as the Gunicorn config.
• Gunicorn is tuned for use in a container oriented environment.
• NGINX is tuned for use in a container oriented environment.