安装docker-compos并使用python flask redis进行部署站点测试

冷不防 2023-06-24 08:13 11阅读 0赞

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**docker-compose练习**

**一、首先安装docker-compose**

推荐使用daocloud给的加速进行安装，否则会遇到各种问题，我踩过坑：

curl -L https://get.daocloud.io/docker/compose/releases/download/1.25.0/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
    chmod +x /usr/local/bin/docker-compose

可以根据自己的对应的compose版本进行修改url中的版本

**二、安装完后构建一个python文件：命名为app.py,代码如下：**

import  time
    import  redis
    from flask import Flask
    app = Flask(__name__)
    cache = redis.Redis(host='redis',port=6379)
    def get_hit_count():
        retries = 5
        while True:
            try:
                return  cache.incr('hits')
            except redis.exceptions.ConnectionError  as exc:
                if retries == 0:
                    raise  exc
                retries -=1
                time.sleep(0.5)
    @app.route('/')
    def hello():
        count = get_hit_count()
        return  'Hello World! I  have  been seen {} times. \n'.format(count)
    if __name__ =='__main__':
        app.run(host='0.0.0.0',debug=True)

**三、构建一个Dockerfile，**

**vim  Dockerfile**

FROM python:3.6-alpine
    ADD . /code
    WORKDIR /code
    RUN pip install redis flask
    CMD ["python","app.py"]

指定python版本为3.6轻量级别的，新增运行目录为 /code  安装依赖的redis  flask  执行命令为 python  app.py

**四、构建docker-compose.yml文件**

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

注意缩进

文件构建完成后，docker-compose  up，会默认去执行 docker-compose.yml文件

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在浏览器中执行  http://0.0.0.0:5000

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