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Deploy a Web Application Over Kubernetes Using Kro

Free

PROJECT

Deploy a Web Application Over Kubernetes Using Kro

In this project, we’ll containerize a Flask app, push it to Docker Hub, and deploy it to a Kubernetes cluster using Kro. Kro is a tool that simplifies Kubernetes resource management through graph-based configuration.

You will learn to:

Create and build a Docker image for our Flask app.

Define a Resource Graph in Kro to manage our app’s Deployment and Service.

Create and apply a Kro instance to launch our app on Kubernetes.

Test and access the running application through a Kubernetes Service.

Skills

Docker Containers

Docker Hub

Docker Images

Kubernetes

Prerequisites

Basic knowledge of Docker and Docker images

Basic knowledge of Docker Hub and its usage

Basic knowledge of Kubernetes

Technologies

Docker

Kubernetes

Project Description

In this project, we will deploy a containerized web application to a Kubernetes cluster using Kro, a CLI tool that simplifies Kubernetes deployments. Instead of manually writing and managing complex Kubernetes YAML files, Kro allows us to define our application’s deployment using a single declarative configuration file.

We’ll start with a simple Flask-based web application, containerize it using Docker, and push the image to a container registry. Then, we’ll define a reusable ResourceGraphDefinition using Kro. In the end, we’ll create an instance of this graph to deploy our application with a single command.

This project provides hands-on experience with:

Docker containerization.
Kubernetes resource management.
Declarative infrastructure using Kro.
Automating deployments with a streamlined CLI.

By the end of the project, we’ll understand how to turn a local app into a live, scalable service running in a Kubernetes cluster, without writing traditional Kubernetes YAML manifests.

Project Tasks

Get Started

Task 0: Explore the Application

Task 1: Set Up Kro

Containerize the Application

Task 2: Create a Dockerfile

Task 3: Create a Docker Image

Deploy using Kro

Task 4: Create a ResourceGraphDefinition Skeleton

Task 5: Add a Deployment Resource to the Graph

Task 6: Add a Service Resource to the Graph

Task 7: Create an Application Instance

Task 8: Access the Application

Congratulations!

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"This was an excellent lesson. I learned a lot working through the process. I enjoyed it so much that I rebuilt it my AWS account to see how hard it would be to deploy to a production environment."

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Senior Software Engineer

Relevant Courses

Use the following content to review prerequisites or explore specific concepts in detail.