Dockerizing Python Projects
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This document discusses how to use Docker to containerize and deploy Python web applications. It provides steps to install Docker, build a sample Flask application into a Docker image, run the container locally, and deploy the containerized application to AWS. Key points covered include using Dockerfiles to create images, the Docker index for sharing images, and port mapping when running containers.
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Dockerizing Python Projects
- 1. Shipping Python Projects by Docker Wei-Ting Kuo
- 2. Outline • Introduction to Docker • define our sample web app • Build/Run Docker Images • Docker Index • Deploy to AWS
- 4. The Matrix From Hell
- 6. The Matrix From Hell
- 7. Solution: Intermodal Shipping Container
- 8. Docker is a shipping container system for code
- 9. Docker eliminates the matrix from hell
- 11. Installation (Ubuntu14.04) • $ sudo apt-get update • $ sudo apt-get install docker.io • $ sudo ln -sf /usr/bin/docker.io /usr/local/bin/docker
- 12. Pull a Base Image • docker pull ubuntu
- 13. List Docker Images • docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE ubuntu 13.10 5e019ab7bf6d 3 weeks ago 180 MB ubuntu saucy 5e019ab7bf6d 3 weeks ago 180 MB ubuntu 12.04 74fe38d11401 3 weeks ago 209.6 MB ubuntu precise 74fe38d11401 3 weeks ago 209.6 MB ubuntu 12.10 a7cf8ae4e998 3 weeks ago 171.3 MB ubuntu quantal a7cf8ae4e998 3 weeks ago 171.3 MB ubuntu 14.04 99ec81b80c55 3 weeks ago 266 MB ubuntu latest 99ec81b80c55 3 weeks ago 266 MB ubuntu trusty 99ec81b80c55 3 weeks ago 266 MB ubuntu raring 316b678ddf48 3 weeks ago 169.4 MB ubuntu 13.04 316b678ddf48 3 weeks ago 169.4 MB
- 14. Run Something • docker run <image> <command … > • docker run ubuntu ls -l /root drwxr-xr-x 2 root root 12288 Apr 16 20:36 bin drwxr-xr-x 2 root root 4096 Apr 10 22:12 games drwxr-xr-x 2 root root 4096 Apr 16 20:36 include drwxr-xr-x 26 root root 4096 Apr 16 20:36 lib drwxr-xr-x 10 root root 4096 Apr 16 20:35 local drwxr-xr-x 2 root root 4096 Apr 24 16:17 sbin drwxr-xr-x 52 root root 4096 Apr 16 20:36 share drwxr-xr-x 2 root root 4096 Apr 10 22:12 src
- 15. Simple Flask App • https://github.com/waitingkuo/flask-sample • flask-sample - app.py - requirements.txt - Dockerfile
- 16. app.py from flask import Flask app = Flask(__name__) ! @app.route("/") def hello(): return "Hello World!" ! if __name__ == "__main__": app.run(‘0.0.0.0’, port=5000)
- 18. Install and Run flask-sample Locally • sudo apt-get install -y python-setuptools • sudo easy_install pip • sudo pip install -r requirements.txt • python app.py * Running on http://0.0.0.0:5000/
- 19. How to build a Docker Image • Dockerfile http://docs.docker.io/reference/builder/
- 20. Dockerfile FROM ubuntu ! # Install Python Setuptools RUN apt-get install -y python-setuptools ! # Install pip RUN easy_install pip ! # Install requirements.txt ADD requirements.txt /src/requirements.txt RUN cd /src; pip install -r requirements.txt ! # Add the Flask App ADD . /src ! # EXPOSE PORT EXPOSE 5000 ! # Run the Flask APP CMD python src/app.py
- 21. Build a Image • docker build -t <image name> <Dockerfile PATH> • docker build -t myapp . Uploading context 76.29 kB Uploading context Step 0 : FROM ubuntu ---> 99ec81b80c55 Step 1 : RUN apt-get install -y python-setuptools ---> Using cache ---> d651a6cb230c Step 2 : RUN easy_install pip ---> Using cache ---> ecf1474da849 Step 3 : ADD requirements.txt /src/requirements.txt ---> Using cache ---> 274c84b5415e ! … (ignore) … ! Successfully built b4c78de4abc1
- 22. Check Your new Image • docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE myapp latest b4c78de4abc1 2 minutes ago 302.7 MB ubuntu 13.10 5e019ab7bf6d 3 weeks ago 180 MB ubuntu saucy 5e019ab7bf6d 3 weeks ago 180 MB ubuntu 12.04 74fe38d11401 3 weeks ago 209.6 MB ubuntu precise 74fe38d11401 3 weeks ago 209.6 MB ubuntu 12.10 a7cf8ae4e998 3 weeks ago 171.3 MB ubuntu quantal a7cf8ae4e998 3 weeks ago 171.3 MB ubuntu 14.04 99ec81b80c55 3 weeks ago 266 MB ubuntu latest 99ec81b80c55 3 weeks ago 266 MB ubuntu trusty 99ec81b80c55 3 weeks ago 266 MB ubuntu raring 316b678ddf48 3 weeks ago 169.4 MB ubuntu 13.04 316b678ddf48 3 weeks ago 169.4 MB
- 23. Run It! • docker run -d -p 5000:5000 myapp -d detached mode -p port forwarding
- 24. How to check the Running Docker Process? • docker ps CONTAINER ID IMAGE COMMAND … PORTS 6294c5a5e9be myapp:latest /bin/sh -c 'python s … 0.0.0.0:5000->5000/tcp • To kill the process, use docker kill <CONTAINER ID>
- 25. Docker Index • https://index.docker.io/ • You might think it as the GitHub For Docker Image • You can pull mysql, mongodb, hadoop, … etc • You can hook your docker index repository on to your own repository on GitHub!!! -> Build images automatically once you push something to Github
- 26. The Repository for our flask-sample • https://index.docker.io/u/waitingkuo/flask-sample/
- 27. Deploy! • Use whatever you want to login to your production server (ssh, fabric, capistrano, chef, puppet, ….) • docker pull waitingkuo/flask-sample • docker run -d -p 5000:5000 waitingkuo/flask- sample
- 28. • Thank you :)