用python制作网页镜像文件

第一步：初始化操作，用可用镜像源：

mkdir -p /etc/docker

tee /etc/docker/daemon.json <<-'EOF'

{

  "registry-mirrors": ["https://hub.docker-alhk.dkdun.com/"]

}

EOF

systemctl daemon-reload

systemctl restart docker

第二步：制作镜像前操作

mkdir /mydocker

cd /mydocker

Dockerfile:指令解释详情看前一篇

FROM python:2.7-slim
WORKDIR /app
ADD . /app
RUN pip install --trusted-host pypi.python.org -r requirements.txt
EXPOSE 80
ENV NAME World
ENV AUTHOR psl
CMD ["python","app.py"]

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)

requirements.txt:

 第三步：制作镜像并基于该镜像启动容器

docker build -t myapp:1.0 制作镜像取名myapp:1.0

docker run -d -p 6379:6379 --name redis-1 redis 容器启用redis数据库（需要有redis镜像文件，因为初始化操作已经设置了可用源，拉取镜像直接docker pull redis就可以）

docker run -d -p 5081:80 --name myapp-2 --link redis-1:redis myapp:1.0（指定容器占用5081端口，连接redis-1容器内的redis数据库，给容器取名myapp-2）

去浏览器输入docker1主机ip地址:5081查看网页效果