Docker 部署 Python 服务

app.py

from flask import Flask
from redis import Redis, RedisError
import os
import socket
 
# Connect to Redis
redis = Redis(host="redis", db=0, socket_connect_timeout=2, socket_timeout=2)
 
app = Flask(__name__)
 
@app.route("/")
def hello():
    try:
        visits = redis.incr("counter")
    except RedisError:
        visits = "<i>cannot connect to Redis, counter disabled</i>"
 
    html = "<h3>Hello {name}!</h3>" \
           "<b>Hostname:</b> {hostname}<br/>" \
           "<b>Visits:</b> {visits}"
    return html.format(name=os.getenv("NAME", "world"), hostname=socket.gethostname(), visits=visits)
 
if __name__ == "__main__":
    app.run(host='0.0.0.0', port=80)

Dockerfile:

# 使用Python官方镜像作为镜像的基础
FROM python:2.7-slim
 
# 设置工作空间为/app
WORKDIR /app
 
# 把当前目录下的文件拷贝到 容器里的/app里
ADD . /app
 
# 安装requirements.txt中指定的依赖
RUN pip install -r requirements.txt
 
# 开放80端口
EXPOSE 80
 
# 设置 NAME 这个环境变量
ENV NAME World
 
# 当容器启动时，运行app.py
CMD ["python", "app.py"]

docker build -t flaskhello .

docker images

docker run -p 4000:80 flaskhello
后台运行,获得一个容器的ID
docker run -d -p 4000:80 flaskhello

看到缩短的容器ID:
docker ps

网页访问
http://localhost:4000

分享你的镜像

账号注册
test2018
aaaaaa

//登陆
docker login

给镜像打标签
docker tag flaskhello test2018/flaskapp:demo
推送到远端
docker push test2018/flaskapp:demo
随时随地都可以执行
docker run -p 4000:80 test2018/flaskapp:demo

创作不易，小小的支持一下吧！