how to docker - flask

README.md

how to python - flask

install docker on mac

• you'll need virtualbox: brew cask install virtualbox
• brew install docker
• install toolbox
  • https://www.docker.com/docker-toolbox
  • or with caskroom: brew cask install dockertoolbox
    • if you get an error: sudo chown -R <username>:staff ~/.docker

run docker

pop up the docker quickstart terminal. it'll start up the VM and you'll be all set up.

• it'll show text docker is configured to use the default machine with IP 192.168.99.100 ==> remember that IP address

set up app

create file app.py

from flask import Flask

app = Flask(__name__)

@app.route('/')
def main():
    return 'Hello World!'

if __name__ == '__main__':
    app.run('0.0.0.0')

and requirements.txt

flask==0.10.1

if you run python app.py locally you can visit localhost:5000 and you'll see "Hello world!".

dockerize the app

• create a Dockerfile.

FROM python:2.7

RUN mkdir /code
WORKDIR /code

ADD requirements.txt /code/
RUN pip install -r requirements.txt

ADD . /code/
EXPOSE 5000

now we run the app in docker.

• docker build -t flaskapp .
• docker run -p 5000:5000 flaskapp python app.py
• the app is now running on the VM. visit the app on the IP address from earlier, port 5000 (e.g. 192.168.99.100:5000)

all done.