Ansible 2 Cloud Automation Cookbook

How to do it...

1. Let's create a basic Docker Compose project in a directory named docker_compose:

$ mkdir -p docker_compose && cd docker_compose

2. We will create a sample web application that uses Python Flask and Redis to count hits on a website:

$ vim app.pyfrom flask import Flaskfrom redis import Redisapp = Flask(__name__)redis = Redis(host='redis', port=6379)@app.route('/')def hello():  count = redis.incr('hits')  return 'Hello World! I have been seen {} times.\n'.format(count)if __name__ == "__main__":  app.run(host="0.0.0.0", debug=True)

3. We will add the requirements.txt file to our application in the same directory:

$ vim requirements.txtflaskredis

4. Let's create a Dockerfile for the application:

$ vim DockerfileFROM python:3.4-alpine ...