Book Image

The Kubernetes Bible

By : Nassim Kebbani, Piotr Tylenda, Russ McKendrick
4 (3)
Book Image

The Kubernetes Bible

4 (3)
By: Nassim Kebbani, Piotr Tylenda, Russ McKendrick

Overview of this book

With its broad adoption across various industries, Kubernetes is helping engineers with the orchestration and automation of container deployments on a large scale, making it the leading container orchestration system and the most popular choice for running containerized applications. This Kubernetes book starts with an introduction to Kubernetes and containerization, covering the setup of your local development environment and the roles of the most important Kubernetes components. Along with covering the core concepts necessary to make the most of your infrastructure, this book will also help you get acquainted with the fundamentals of Kubernetes. As you advance, you'll learn how to manage Kubernetes clusters on cloud platforms, such as Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP), and develop and deploy real-world applications in Kubernetes using practical examples. Additionally, you'll get to grips with managing microservices along with best practices. By the end of this book, you'll be equipped with battle-tested knowledge of advanced Kubernetes topics, such as scheduling of Pods and managing incoming traffic to the cluster, and be ready to work with Kubernetes on cloud platforms.
Table of Contents (28 chapters)
1
Section 1: Introducing Kubernetes
5
Section 2: Diving into Kubernetes Core Concepts
12
Section 3: Using Managed Pods with Controllers
17
Section 4: Deploying Kubernetes on the Cloud
21
Section 5: Advanced Kubernetes

Managing StatefulSet

To demonstrate how StatefulSet objects work, we will modify our nginx deployment and adapt it to be a StatefulSet. A significant part of the StatefulSet specification is the same as for Deployments. As we would like to demonstrate how automatic management of PVCs works in StatefulSet objects, we will use volumeClaimTemplates in the specification to create PVCs and PVs, which the Pods will consume. Each Pod will internally mount its assigned PV under the /usr/share/nginx/html path in the container filesystem, which is the default location of nginx files that are served over HTTP. In this way, we can demonstrate how the state is persisted, even if we forcefully restart Pods.

Important note

The example that we are going to use in this chapter is for demonstration purposes only and is meant to be as simple as possible. If you are interested in complex examples, such as deploying and managing distributed databases in StatefulSets, please take a look at the official...