Docker compose tutorial – python design

install docker-compose
apt install docker-compose

create two dir: Product and website and files as below:
root@ubunu2004:~/tmp# tree
.
├── docker-compose.yml
├── Product
│   ├── api.py
│   ├── Dockerfile
│   └── requirements.txt
└── website
└── index.php

root@ubunu2004:~/Product# cat api.py
from flask import Flask
from flask_restful import Resource, Api
app = Flask(__name__)
api = Api(app)
class Product(Resource):
def get(self):
    return {
        'products': ['Ice cream',
                    'Chocolate',
                    'Eggs',
                    'Fruit']
    }
api.add_resource(Product, '/')
if __name__ == '__main__':
app.run(host='0.0.0.0', port=80, debug=True)
root@ubunu2004:~/Product# cat requirements.txt
Flask==0.12
flask-restful==0.3.5
root@ubunu2004:~/Product# cat Dockerfile
FROM python:3-onbuild
COPY . /usr/src/app
CMD ["python", "api.py"]

root@ubunu2004:~/tmp/website# cat index.php
<html>
<head>
    <title>My Shop</title>
</head>

<body>
    <h1>Welcome to my shop</h1>
    <ul>
        <?php
            $json = file_get_contents('http://product-service');
            $obj = json_decode($json);
            $products = $obj->products;
            foreach ($products as $product) {
                echo "<li>$product</li>";
            }
        ?>
    </ul>
</body>
</html>

create docker-compose.yml:

version: '3'
services:
product-service:
build: ./Product
volumes:
  - ./Product:/usr/src/app
ports:
  - 5001:80
website:
image: php:apache
volumes:
  - ./website:/var/www/html
ports:
  - 5000:80
depends_on:
  - product-service

then we can start it:
docker-compose up
or start/stop as daemon:
root@ubunu2004:~# docker-compose up -d
Starting root_product-service_1 … done
Starting root_website_1 … done
root@ubunu2004:~# docker-compose stop
Stopping root_website_1 … done
Stopping root_product-service_1 … done

verify the app on http://192.168.0.43:5000/

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