Book Image

Mastering Elastic Kubernetes Service on AWS

By : Malcolm Orr, Yang-Xin Cao (Eason)
5 (1)
Book Image

Mastering Elastic Kubernetes Service on AWS

5 (1)
By: Malcolm Orr, Yang-Xin Cao (Eason)

Overview of this book

Kubernetes has emerged as the de facto standard for container orchestration, with recent developments making it easy to deploy and handle a Kubernetes cluster. However, a few challenges such as networking, load balancing, monitoring, and security remain. To address these issues, Amazon EKS offers a managed Kubernetes service to improve the performance, scalability, reliability, and availability of AWS infrastructure and integrate with AWS networking and security services with ease. You’ll begin by exploring the fundamentals of Docker, Kubernetes, Amazon EKS, and its architecture along with different ways to set up EKS. Next, you’ll find out how to manage Amazon EKS, encompassing security, cluster authentication, networking, and cluster version upgrades. As you advance, you’ll discover best practices and learn to deploy applications on Amazon EKS through different use cases, including pushing images to ECR and setting up storage and load balancing. With the help of several actionable practices and scenarios, you’ll gain the know-how to resolve scaling and monitoring issues. Finally, you will overcome the challenges in EKS by developing the right skill set to troubleshoot common issues with the right logic. By the end of this Kubernetes book, you’ll be able to effectively manage your own Kubernetes clusters and other components on AWS.
Table of Contents (28 chapters)
1
Part 1: Getting Started with Amazon EKS
7
Part 2: Deep Dive into EKS
13
Part 3: Deploying an Application on EKS
20
Part 4: Advanced EKS Service Mesh and Scaling
24
Part 5: Overcoming Common EKS Challenges

Understanding key Kubernetes concepts

Kubernetes clusters have two categories of users: service accounts managed by Kubernetes, and normal users (administrators, developers, etc.). Kubernetes (K8s) is extensible by design and supports multiple authentication plugins. We will focus on the most common one, client certificates, while discussing generic user authentication/authorization in Kubernetes.

Using the client certificates’ plugin, users are considered authenticated when they furnish a valid certificate signed by the cluster’s certificate authority (CA).

With a valid certificate, Kubernetes determines the username from the common name field in the Subject of the certificate (e.g., /CN=bob) while the group information is provided in the Organization field (e.g., /O=dev). From this point onwards, the role-based access control (RBAC) sub-system will determine whether the user is authorized to perform a particular operation on a resource.

The following diagram...