Book Image

50 Kubernetes Concepts Every DevOps Engineer Should Know

By : Michael Levan
Book Image

50 Kubernetes Concepts Every DevOps Engineer Should Know

By: Michael Levan

Overview of this book

Kubernetes is a trending topic among engineers, CTOs, CIOs, and other technically sound professionals. Due to its proliferation and importance for all cloud technologies, DevOps engineers nowadays need a solid grasp of key Kubernetes concepts to help their organization thrive. This book equips you with all the requisite information about how Kubernetes works and how to use it for the best results. You’ll learn everything from why cloud native is important to implementing Kubernetes clusters to deploying applications in production. This book takes you on a learning journey, starting from what cloud native is and how to get started with Kubernetes in the cloud, on-premises, and PaaS environments such as OpenShift. Next, you’ll learn about deploying applications in many ways, including Deployment specs, Ingress Specs, and StatefulSet specs. Finally, you’ll be comfortable working with Kubernetes monitoring, observability, and security. Each chapter of 50 Kubernetes Concepts Every DevOps Engineer Should Know is built upon the previous chapter, ensuring that you develop practical skills as you work through the code examples in GitHub, allowing you to follow along while giving you practical knowledge. By the end of this book, you’ll be able to implement Kubernetes in any environment, whether it’s an existing environment, a greenfield environment, or your very own lab running in the cloud or your home.
Table of Contents (14 chapters)
Part 1: First 20 Kubernetes Concepts – In and Out of the Cloud
Part 2: Next 15 Kubernetes Concepts – Application Strategy and Deployments
Part 3: Final 15 Kubernetes Concepts – Security and Monitoring

Upgrading Kubernetes apps

Throughout this chapter, you learned some very important lessons:

  • How to deploy an app
  • How to deploy different types of apps on Kubernetes
  • How to ensure apps are properly scaled
  • How to ensure apps are running as you expected

Once you get an application to where you’d like it to be, it’s a great accomplishment. Then, before you know it, it’s time to upgrade or update the application and you have to start on the journey all over again. You must test out the new version of the app, get it deployed without taking down the entire production environment, and retest all the components to ensure it’s running as expected.

There may also be times, which is extremely common, when you must roll back an update or upgrade to a previous application version. Perhaps it wasn’t properly tested in the staging environment, or something popped up that the QA/regression testing didn’t catch. In any case, you...