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Mastering Elastic Kubernetes Service on AWS

Mastering Elastic Kubernetes Service on AWS

By : Malcolm Orr, Yang-Xin Cao, Yang-Xin Cao (Eason)
4.9 (23)
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Mastering Elastic Kubernetes Service on AWS

Mastering Elastic Kubernetes Service on AWS

4.9 (23)
By: Malcolm Orr, Yang-Xin Cao, 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)
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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 Kubernetes volumes, the CSI driver, and storage on AWS

The basic storage object within Kubernetes is a volume, which represents a directory (with or without data) that can be accessed by containers in a Pod. You can have ephemeral volumes that persist over container restarts but are aligned to the lifetime of the Pod and are destroyed by the Kubernetes scheduler when the Pod is destroyed. Persistent volumes are not destroyed by Kubernetes and exist separately from the Pod or Pods that use them.

The simplest example of an ephemeral volume is an emptyDir volume type. An example is shown next, which mounts host storage inside the containers using the mountPath key. As both containers use the same volume, they see the same data despite the fact it’s mounted onto different mount points. When a Pod dies, crashes, or is removed from a node, the data in the emptyDir volume is deleted and lost:

apiVersion: v1
kind: Pod
metadata:
  name: empty-dir-example...

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