Book Image

50 Kubernetes Concepts Every DevOps Engineer Should Know

By : Michael Levan
5 (1)
Book Image

50 Kubernetes Concepts Every DevOps Engineer Should Know

5 (1)
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)
1
Part 1: First 20 Kubernetes Concepts – In and Out of the Cloud
6
Part 2: Next 15 Kubernetes Concepts – Application Strategy and Deployments
9
Part 3: Final 15 Kubernetes Concepts – Security and Monitoring

Exploring networking and system components

Networking in a Kubernetes cluster, aside from the Kubernetes API itself, is what makes Kubernetes truly tick. Networking comes into play in various ways, including the following:

  • Pod-to-Pod communication
  • Service-to-Service communication
  • How nodes talk to each other inside of the cluster
  • How users interact with your containerized applications

Without networking, Kubernetes wouldn’t be able to perform any actions. Even from a control plane/worker node perspective, worker nodes can’t successfully communicate with control planes unless proper networking is set up.

This section could be, at the very least, two chapters in itself. Because we only have one section to hammer this knowledge down, let’s talk about the key components.

kube-proxy

When you first start to learn about how networking works inside of Kubernetes and how all resources communicate with each other, it all starts with kube...