Docker/Flask
< Docker
Dockerfile
edit# Configures a Flask web server and copies the current folder content
# to use as app root.
# Use the following commands to build and run the server.
# docker build -t flask-server .
# docker run -d -p 5000:5000 --name=flask-server flask-server
# Then open a web browser and connect to http://localhost:5000 .
# References:
# https://code.visualstudio.com/docs/containers/quickstart-python
# https://aka.ms/vscode-docker-python
# https://runnable.com/docker/python/dockerize-your-flask-application
# https://docs.docker.com/develop/develop-images/dockerfile_best-practices/
FROM python:alpine
RUN python -m pip install flask
WORKDIR /usr/src/app
COPY . .
EXPOSE 5000
CMD ["python", "app.py"]
app.py
edit# Displays "Hello world!"
#
# References:
# https://en.wikiversity.org/wiki/Flask/Hello_World
import flask
app = flask.Flask(__name__)
@app.route('/')
def root():
return "Hello world!"
if __name__ == "__main__":
app.run(host='0.0.0.0', port=5000)
Try It
editOnline Free
edit- Use Play with Docker. Create an account and/or log in.
- Start an interactive session and add a new instance.
- In the terminal window, enter the following commands:
touch Dockerfile
touch app.py
- Use the
Editor
button to edit both files and save the contents above into each respective file. - Run the following commands:
docker build -t flask-server .
docker run -d -p 5000:5000 --name=flask-server flask-server
- In the top window, select the
5000
button to connect to the running server.
On Your Own System
edit- Install Docker Desktop or the Docker Engine.
- Save the files above into a new
Docker Flask
folder:Dockerfile
app.py
- At a command prompt, change to the
Docker Flask
folder and then run the following commands:docker build -t flask-server .
docker run -d -p 5000:5000 --name=flask-server flask-server
- Open a web browser to connect to the running server: