[Kubernetes Practical Lab] Rolling Update Project

Hello, Kubernetes learners! In this Kubernetes lab, we’ll explore one of the pivotal features of Kubernetes: Rolling Updates. If you’ve ever wanted to seamlessly deploy new versions of your applications with zero downtime, this guide is for you!

TL;DR — What is a Rolling Update?

A rolling update is a method of deploying new versions of an application without downtime. Instead of stopping the entire application to deploy the new version, Kubernetes replaces old Pods with new ones gradually.

Rolling Update (Source: https://hub.qovery.com/docs/using-qovery/deployment/deployment-strategies/)

Step-by-Step Practical Lab:

Step 1: Deploying the Initial Version of the Application

1. Defining the Deployment: Let’s deploy a simple nginx version 1.16.

k create deployment nginx --image=nginx:1.16

Step 2: Making Changes and Deploying with a Rolling Update

1. Modifying the Deployment: Update the nginx image version to 1.17

kubectl set image deployment nginx nginx=nginx:1.17