Dockerize that Django app!

But... what is Docker?

Docker helps you test and deploy your apps in isolated environments.

Each app is sandboxed within its a "Docker Container".

A Container is...

  • Based on a Docker Image: base Linux OS, modified base, base with additional tools e.g. Postgresql
  • Uses LXC and AuFS
  • Behaves like a real dedicated OS
  • Used to isolate apps, databases, messaging queues, ...

Docker Containers vs VMs

Why is Docker Awesome?

  • True App isolation
  • SMALL footprint!
  • Great flexibility
  • Supports multiple linux OSs
  • DB and other toolsets can abstracted out
  • Provisioning tools
  • Amazing PaaS possibilities

Let's Dockerize that Django app!

Let's Dockerize that Django app!

Now let's create a container

Step 1.

We need a base image!

You can use a base OS one:

  • Ubuntu
  • CentOS
  • Debian
  • ...

You can use a modified base e.g.:

  • Ubuntu 14.04 base with PostgreSQL 9
  • CentOS base with RabbitMQ
  • Debian with MongoDB
  • ...

Docker Hub

Grab your repos!

Step 2.

Fire the image up in a container

Example Dockerfile

 
FROM ubuntu
MAINTAINER You! "you@email.com"

ADD . /home/docker/app

RUN apt-get -qq update
RUN apt-get install -y python-dev python-setuptools supervisor git-core
RUN easy_install pip
RUN pip install -r /home/docker/app/requirements.txt
RUN (cd /home/docker/app/ && python manage.py syncdb --noinput)
RUN (cd /home/docker/app/ && python manage.py collectstatic --noinput)
EXPOSE 8000
CMD ["python", "manage.py", "runserver", "0.0.0.0:8000"]

Thank you!