pythonDocker.txt

1) sudo nano 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
COPY . /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"]


2) sudo nano requirements.txt
Flask
Redis

3) sudo nano requirements.txt

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)



4) docker build -t friendlyhello .

5) docker run -p 4000:80 friendlyhello

6)curl http://localhost:4000

7)sudo docker images ls -a

8)sudo docker tag 6edf906dcc81  andalike/friendlyhello

9)sudo docker build -t andalike/friendlyhello .

10)sudo docker run -p 4000:80 andalike/friendlyhello

11)sudo docker tag 6edf906dcc81 andalike/friendlyhello

12)sudo docker push andalike/friendlyhello