Docker Tutorial - Python App

The intention of this project is to teach you the basics of building a docker app.

Notes

A Dockerfile is a simple text file that contains a list of commands that the Docker client calls while creating an image. It's a simple way to automate the image creation process. The best part is that the commands you write in a Dockerfile are almost identical to their equivalent Linux commands. This means you don't really have to learn new syntax to create your own dockerfiles.

Steps

1.Build The docker image

docker build -t yourusername/catnip:1.0.0 .

2. Now check that the docker image has been built and exists locally

docker image ls

3. Try run this container

docker run -p 8888:5000 yourusername/catnip:1.0.0
# check that its running
docker ps

Once running try to access the application at http://localhost:8888/

This docker image exist locally in the docker engine if you want to share it with others or use it as part of automation or a deployment to cloud it must be stored on a publicly available registry so that it can be accessed.

4. Push to docker hub

Note this could just as easily be a private coporate reposiroty instead of the public docker hub

docker login
docker push yourusername/catnip

Now log on to Docker Hub and see that your image is there you can now pull this image