Book Image

Mastering Kubernetes - Third Edition

By : Gigi Sayfan
Book Image

Mastering Kubernetes - Third Edition

By: Gigi Sayfan

Overview of this book

The third edition of Mastering Kubernetes is updated with the latest tools and code enabling you to learn Kubernetes 1.18’s latest features. This book primarily concentrates on diving deeply into complex concepts and Kubernetes best practices to help you master the skills of designing and deploying large clusters on various cloud platforms. The book trains you to run complex stateful microservices on Kubernetes including advanced features such as horizontal pod autoscaling, rolling updates, resource quotas, and persistent storage backend. With the two new chapters, you will gain expertise in serverless computing and utilizing service meshes. As you proceed through the chapters, you will explore different options for network configuration and learn to set up, operate, and troubleshoot Kubernetes networking plugins through real-world use cases. Furthermore, you will understand the mechanisms of custom resource development and its utilization in automation and maintenance workflows. By the end of this Kubernetes book, you will graduate from an intermediate to advanced Kubernetes professional.
Table of Contents (19 chapters)
17
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18
Index

Understanding cluster federation

Cluster federation is conceptually simple. You aggregate multiple Kubernetes clusters and treat them as a single logical cluster. There is a federation control plane that presents to clients a single unified view of the system.

The following diagram demonstrates the big picture of the Kubernetes Cluster Federation. The pink box is a host cluster that runs the federation APIs and the green boxes are member clusters:

Figure 11.1: The Kubernetes Cluster Federation

The federation control plane consists of a federation API server and a federation controller manager that collaborate with each other. The federated API server forwards requests to all the clusters in the federation. In addition, the federated controller manager performs the duties of the controller manager across all of the clusters by routing requests to the individual federation cluster members' changes. In practice, cluster federation is not trivial and...