├── Dockerfile
├── README.md
├── app.py
├── docker-compose.yml
└── requirements.txt


/Dockerfile:
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1 | FROM python:2.7
2 | ADD . /code
3 | WORKDIR /code
4 | RUN pip install -r requirements.txt
5 | CMD python app.py
6 | 
7 | # docker build -t web .


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/README.md:
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 1 | # Getting started with docker-compose, using python/flask & redis
 2 | 
 3 | Compose is a tool for defining and running multi-container Docker applications. You use a Compose file to configure your application’s services. Then using a single command, you create and start all the services.
 4 | 
 5 | In this repo, there is a basic python flask web app in `app.py`, a Dockerfile for the specs of the container for that app (which is based off a python image), a requirements file for Docker installation additional requirements for the app (flask, redis), and a docker-compose file for the specification of the composed containers which includes the flask and redis containers. I created this in conjunction with reading this docker-compose tutorial, so you can use it to get more information on what these files do, https://docs.docker.com/compose/gettingstarted/
 6 | 
 7 | To get the app running in one container with redis in another, try these steps:
 8 | 
 9 | 1. Create the files locally. See if you can tell what each one does. Check the above link to learn more.
10 | 
11 | 1. Run `docker-compose build' to build the containers specified in the docker-compose file.
12 | 
13 | 1. Run `docker-compose up` to start the containers (add -d to run them in the background. Then run `docker-compose stop` when done.)  
14 | 
15 | 1. Browse to http://localhost:5000 to see the response from the web app. 
16 | 


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/app.py:
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 1 | from flask import Flask
 2 | from redis import Redis
 3 | 
 4 | app = Flask(__name__)
 5 | redis = Redis(host='redis', port=6379)
 6 | 
 7 | @app.route('/')
 8 | def hello():
 9 |     redis.incr('hits')
10 |     return 'Hello World! I have been seen %s times.' % redis.get('hits')
11 | 
12 | if __name__ == "__main__":
13 |     app.run(host="0.0.0.0", debug=True)


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/docker-compose.yml:
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 1 | version: '2'
 2 | services:
 3 |   web:
 4 |     build: .
 5 |     ports:
 6 |      - "5000:5000"
 7 |     volumes:
 8 |      - .:/code
 9 |     depends_on:
10 |      - redis
11 |   redis:
12 |     image: redis


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/requirements.txt:
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1 | flask
2 | redis


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