> cd ~
> mkdir docker-test
> cd docker-test
- Dockerfile
# Dockerfile
FROM python:2.7-slim
WORKDIR /app
ADD . /app
RUN pip install --trusted-host pypi.python.org -r requirements.txt
ENV NAME World
CMD ["python", "app.py"]
- 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
# requirements.txt
Flask
Redis
> docker build -t my-python .
> docker images
# REPOSITORY TAG IMAGE ID CREATED SIZE
# my-python latest <Image ID> 14 minutes ago 131MB
> docker run -p 8001:80 my-python