juhapekkaeloranta / flask-docker

Template for flask app in a container

Template for docker + flask

A helloworld flask app inside a docker container. Use this as a project template.

Structure

The application code is in the web folder:

• app.py - application code
• Dockerfile - build instruction for Docker
• requirements.txt - dependencies for build

The project root has docker-compose.yml file that makes container management easier. It looks like this:

web:
  build: ./web
  ports:
   - "5001:5000"
  volumes:
   - ./web:/app

It defines a container with the name web and following configurations:

1. Build the container with files from the web folder

build: ./web

2. Forward container port 5000 to host port 5001

ports:
   - "5001:5000"`

3. Set up a "live sync" (=mount) between container folder /app and source code folder ./web. Changes in source code will initiate a automatical rebuild of the container. This is handy in development but should never be used in production!

  volumes:
   - ./web:/app

Commands

Start the server:

docker-compose up

Add -d for detached mode.

docker-compose up -d

Attach to the container:

docker exec -i -t flaskdocker_web_1 bash