Docker系列之使用Docker Compose编排容器

# curl -L https://github.com/docker/compose/releases/download/1.8.0/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
# chmod +x /usr/local/bin/docker-compose

# docker-compose --version

# mkdir python
# cd python

# vi app.py 
from flask import Flask
from redis import Redis

app = Flask(__name__)
redis = Redis(host='redis', port=6379)

@app.route('/')
def hello():
  redis.incr('hits')
  return 'Hello World! I have been seen %s times.' % redis.get('hits')

if __name__ == "__main__":
  app.run(host="0.0.0.0", debug=True)

# vi requirements.txt 
flask
redis

# vi Dockerfile 
FROM python:2.7
ADD . /code
WORKDIR /code
RUN pip install -r requirements.txt
CMD python app.py

# cat docker-compose.yml 
version: '2'
services:
 web:
  build: .
  ports:
   - "5000:5000"
  volumes:
   - .:/code
  depends_on:
   - redis
 redis:
  image: redis

# docker-compose up

# docker-compose up -d

# docker-compose stop

# docker-compose ps

#docker-compose run services cmd

# docker-compose run web env

# mkdir wordpress
# cd wordpress

# cat docker-compose.yml 
version: '2'
services:
 db:
  image: mysql:5.7
  volumes:
   - "./.data/db:/var/lib/mysql"
  restart: always
  environment:
   MYSQL_ROOT_PASSWORD: wordpress
   MYSQL_DATABASE: wordpress
   MYSQL_USER: wordpress
   MYSQL_PASSWORD: wordpress

 wordpress:
  depends_on:
   - db
  image: wordpress:latest
  links:
   - db
  ports:
   - "8000:80"
  restart: always
  environment:
   WORDPRESS_DB_HOST: db:3306
   WORDPRESS_DB_PASSWORD: wordpress

# docker-compose up -d

# docker-compose ps