Docker Compose demo 使用

1.docker compose 安装

curl -L "https://github.com/docker/compose/releases/download/1.22.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

chmod +x /usr/local/bin/docker-compose

2.docker compose demo 使用

1.创建一个目录

mkdir composetest

2.在这个目录创建 app.py 文件

import time

import redis
from flask import Flask

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

@app.route('/')
def index():
    count = cache.get('hits')
    return 'You are get: {} times.\n'.format(count)

@app.route('/incr')
def incr():
    count = cache.incr('hits')
    return 'You are incr: {} times.\n'.format(count)

@app.route('/decr')
def decr():
    count = cache.decr('hits')
    return 'You are decr: {} times.\n'.format(count)

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

3.创建requirements.txt 文件

文件内容如下：

flask
redis

4.创建一个Dockerfile。

FROM python:3.4-alpine
ADD . /code
WORKDIR /code
RUN pip install -r requirements.txt
CMD ["python", "app.py"]

5.创建 docker-compose.yml 文件。

version: '3'
services:
  web:
    build: .
    ports:
     - "5000:5000"
  redis:
    image: "redis:alpine"

6.使用compose构建应用程序

docker-compose up  -d