Project: docker_django

This is a bare minimum Django server app that is wrapped in a Docker image. It is based upon a PyTexas demo by Mark Adams.

Installation

Install Docker Git clone this repo

Create the image

docker build -t demoapp .

Create the Dockerfile

The contents of the Dockerfile build script will start with python 3.4

FROM python:3.4

# Set PYTHONUNBUFFERED so output is displayed in the Docker log
ENV PYTHONUNBUFFERED=1

EXPOSE 8000
WORKDIR /usr/src/app

# Install dependencies
COPY requirements.txt requirements.txt
RUN pip install -r requirements.txt

# Copy the application's code
COPY . /usr/src/app

# Run the app
RUN chmod +x ./run_app.sh
CMD ["./run_app.sh"]

Create and run a container from the image. This will build a container with the tag "demoapp" and the dot indicates the Dockerfile location.

docker build -t demoapp .

View the image on your machine

docker images

Run and test your image in a container

The -ti for "terminal interactive" allows you to use ^C to kill the process. The -p 8000:8000 options indicate the exposedPort:internalPort accessiblility. The express-helloworld option indicates the image name to create a container.

docker run -d -p 8000:8000 demoap

Switch to your browser and get: http://127.0.0.1:8000/

Clean up

Kill the running process

docker kill [containerId]

List container instances to be removed

docker ps -a

Remove container instances docker rm

docker rm ea0ea

Remove images

docker rmi demoapp

Bonus

Add to your github repo

git init
git add .
## create your github repo
git remote add origin https://github.com/chrispauley/docker_django.git
git push origin master

Deploy to a Docker Host

Login to your server host. At a terminal window

git clone https://github.com/chrispauley/docker_django.git
cd docker-express
docker build -t demoapp .
docker run -ti -p 8000:8000 demoapp

Make sure your server host port 8000 is accessible and test it: http://192.168.0.84:8000/ Update a cname record on your domain and your up.

Clean Up

Remember to clean up your containers and images!

Deploy to Docker Hub

First tag your image with your hub.docker.com user account name:

docker tag a234b052333a chrispauley/guestbook
docker images

Next, login and push to Docker hub

docker push chrispauley/guestbook

Now you can deploy using a docker pull command on a docker host server. Switch to the docker host machine.

docker run -ti -d -p 8000:8000 chrispauley/guestbook

Test it from your browser and enjoy.

Docker Compose

• docker-compose build
• docker-compose up
• docker-compose kill [containerId]
• docker-compose stop [containerId]
• docker-compose rm [containerId]
• docker-compose env

Docker Machine

• docker-machine create [hostId]

• creates a new docker host (like on AWS, Rackspace, etc.)

• docker-machine ls
• docker-machine ssh [hostId]

• connects to the host using ssh

• docker-machine rm [hostId]
  • destroys a host

Supported Providers

• amazonec2
• azure
• digitalocean
• exoscale
• google
• openstack
• rackspace
• softlayer
• virtualbox
• vmwarecloudair
• vmwarevsphere