在空目录创建Dockerfile

# Use an official Python runtime as a parent image
FROM python:2.7-slim

# Set the working directory to /app
WORKDIR /app

# Copy the current directory contents into the container at /app
ADD . /app

# Install any needed packages specified in requirements.txt
RUN pip install --trusted-host pypi.python.org -r requirements.txt

# Make port 80 available to the world outside this container
EXPOSE 80

# Define environment variable
ENV NAME World

# Run app.py when the container launches
CMD ["python", "app.py"]

创建requirements.txt

Flask
Redis

创建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)

构建app

docker build -t friendlyhello .

运行app

docker run -p 4000:80 friendlyhello

代理服务器

当应用隐藏在proxy server之后时，可以设置代理服务器的主机与端口

ENV http_proxy host:port
ENV https_proxy host:port

DNS配置

如果修改DNS配置，可以修改/etc/docker/daemon.json

{
  "dns": ["your_dns_address", "8.8.8.8"]
}

共享镜像

登录cloud.docker.com

docker login

标记镜像

docker tag friendlyhello gordon/get-started:part2

推送镜像

docker push username/repository:tag

【参考】

1。docker-ce：快速入门：https://docs.docker.com/get-started/part2/\#conclusion-of-part-two