Book Image

The Kubernetes Book

By : Nigel Poulton, Pushkar Joglekar
Book Image

The Kubernetes Book

By: Nigel Poulton, Pushkar Joglekar

Overview of this book

Kubernetes is the leading orchestrator of cloud-native apps. With knowledge of how to work with Kubernetes, you can easily deploy and manage applications on the cloud or in your on-premises data center. The book begins by introducing you to Kubernetes and showing you how to install it. You’ll learn how to use Kubernetes Services and bring stable and reliable networking to apps that are deployed on Kubernetes. You'll delve deep into the powerful storage subsystem of Kubernetes and learn how to leverage the variety of external storage backends in your applications. As the book progresses, it shows you how to use features such as DaemonSets, Helm, and RBAC to enhance your Kubernetes applications. You'll explore the six categories of identifying vulnerabilities and look at a few ways to prevent and mitigate them. You'll also look at ways to secure the software delivery pipeline by discussing some image-related best practices. The book ends by sharing with you some resources that’ll help take your Kubernetes knowledge to the next level. By the end of the book, you’ll have the confidence and skills to leverage all the features of Kubernetes to develop scalable applications.
Table of Contents (23 chapters)
Free Chapter
1
Chapter 1
3
Chapter 2
5
Chapter 3
7
Chapter 4
9
Chapter 5
11
Chapter 6
13
Chapter 7
15
Chapter 8
17
Chapter 9
19
Chapter 10
21
Chapter 11

Kubernetes from 40k Feet

At the highest level, Kubernetes is two things:

  • A cluster for running applications
  • An orchestrator of cloud-native microservices apps.

On the cluster front, Kubernetes is like any other cluster — a bunch of nodes and a control plane. The control plane exposes an API, has a scheduler for assigning work to nodes, and state is recorded in a persistent store. Nodes are where application services run.

Kubernetes is API-driven and uses standard HTTP RESTful verbs to view and update the cluster.

On the orchestrator front, "orchestrator" is just a fancy name for an application that's made from lots of small independent services that work together to form a useful app.

Let's look at a quick analogy.

In the real world, a football (soccer) team is made of individuals. No two are the same, and each has a different role to play in the team — some defend, some attack, some are great at passing, some tackle...