So, you know you want to run your application in Kubernetes but don’t know where to start. Or maybe you’re getting started but still don’t know what you don’t know. In this blog you’ll walk through how to containerize an application and get it running in Kubernetes.

This walk-through assumes you are a developer or at least comfortable with the command line (preferably bash shell).

What we’ll do

  1. Get the code and run the application locally
  2. Create an image and run the application in Docker
  3. Create a deployment and run the application in Kubernetes


Containerizing an application

In this section you’ll take some source code, verify it runs locally, and then create a Docker image of the application. The sample application used is a very simple Flask web application; if you want to test it locally, you’ll need Python installed. Otherwise, you can skip to the “Create a Dockerfile” section.

Get the application code

Use git to clone the repository to your local machine:

git clone

Change to the app directory:

cd hello-python/app

There are only two files in this directory. If you look at the file, you’ll see the application prints out a hello message. You can learn more about Flask on the Flask website.

from flask import Flask
app = Flask(__name__)

def hello():
    return "Hello from Python!"

if __name__ == "__main__":'')

The requirements.txt file contains the list of packages needed by the and will be used by pip to install the Flask library.

#python #kubernetes

Get Started with Kubernetes (using Python)
1.40 GEEK