使用Python + Flask + Docker来运行Web应用程序

1 年 ago

宇, 华

2 minutes

摘要

在EC2实例上安装并运行docker和docker-compose的方法备忘录
操作系统：amazonLinux2

文档

https://flask.palletsprojects.com/en/2.0.x/tutorial/
https://flask.palletsprojects.com/en/2.0.x/installation/
https://flask.palletsprojects.com/en/2.0.x/quickstart/

以下是网址链接：
https://flask.palletsprojects.com/en/2.0.x/tutorial/
https://flask.palletsprojects.com/en/2.0.x/installation/
https://flask.palletsprojects.com/en/2.0.x/quickstart/

安装Docker

安装 -> 启动 -> 调整权限以使ec2-user可以运行

$ sudo su -
# yum update -y
# amazon-linux-extras install -y docker
# systemctl enable docker
# systemctl start docker
# usermod -aG docker ec2-user

安装docker-compose

如果能够显示版本信息就可以了，需要根据需要调整docker-compose的版本。

# curl -L https://github.com/docker/compose/releases/download/1.24.1/docker-compose-Linux-x86_64 -o /usr/local/bin/docker-compose
# chmod 755 /usr/local/bin/docker-compose
# docker-compose -v
docker-compose version 1.24.1, build 4667896b

创建一个 Python 容器并进行访问确认。

请使用ec2-user进行操作。

$ mkdir project
$ cd project/
$ mkdir -p docker/python

$ vi docker/python/Dockerfile
$ vi docker-compose.yml
$ vi docker/python/app.py 
$ vi docker/python/templates/index.html

$ docker-compose up -d

from flask import Flask, render_template

app = Flask(__name__)

@app.route('/')
def index():
    return render_template('index.html')

if __name__ == "__main__":
    app.run(debug=True, host='0.0.0.0', port=5000)

version: "3"

services:
  python:
    build: ./docker/python
    ports:
      - 80:5000

FROM python:3.9
WORKDIR /app
ADD . /app
RUN pip install Flask
EXPOSE 5000
CMD ["python", "app.py"]

<html>
    <title>hogehoge</title>
    <head>
    </head>

    <body>
        hogehoge
    </body>
</html>

达到目标

只要通过公共IP的80端口访问，出现显示”hogehoge”的页面就可以。

补充

在我的本地环境下运行这篇文章中提到的内容。

from flask import Flask, render_template
import numpy as np
from matplotlib.figure import Figure
import base64
from io import BytesIO

app = Flask(__name__)

@app.route('/')
def index():
    np.random.seed(1)
    x = np.arange(10)
    y = np.random.randint(1, 1000, 10)

    fig = Figure()
    ax = fig.subplots()
    ax.plot(x, y)

    buf = BytesIO()
    fig.savefig(buf, format="png")

    data = base64.b64encode(buf.getbuffer()).decode("ascii")
    return render_template('index.html', data=data)

if __name__ == "__main__":
    app.run(debug=True, host='0.0.0.0', port=5000)

FROM python:3.9
WORKDIR /app
ADD . /app
RUN pip install Flask\
    & pip install numpy\
    & pip install matplotlib
EXPOSE 5000
CMD ["python", "app.py"]

<html>
  <title>hogehoge</title>
  <head>
  </head>

  <body>
    <img src="data:image/png;base64,{{data}}"/>
  </body>
</html>