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

Launching a node with Amazon Linux

In this section, we will discuss what is needed to launch a single EC2 instance and connect it to a cluster. We will then build on this as we discuss managed node groups.

Prerequisites for launching a node with Amazon Linux

A worker node is simply an EC2 instance that is used by EKS to actually host the Pods deployed on the cluster. Any EC2 instance will need the following:

  • An Identity and Access Management (IAM) role that allows it to talk to the AWS API (EKS, EC2, and so on)
  • A security group that, at a minimum, allows communication to the EKS control plane
  • An operating system image that has the Kubernetes agents (kubelet, and so on) installed
  • An init/boot script to register with a specific EKS cluster

IAM role and permissions

Each worker node and EC2 instance requires an IAM role to be attached to it that allows communication with the AWS EKS API, Elastic Container Registry (ECR), and the EC2 API. There are three...