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

Setting Load Balancing for Applications on EKS

In Chapter 4, we looked at how you can use a NodePort, Ingress, and/or AWS Load Balancer (LB) to expose a simple application. In this chapter, we will dive into more detail on how to scale and provide greater resilience in your application using AWS Elastic Load Balancers (ELBs).

In most modern web or cloud-native applications, you want to ensure that the application is available to its client (resilient) and copes as the Kubernetes scheduler scales your application by replacing, removing, and adding Pods when necessary. Placing an LB in front of your application allows these Kubernetes actions to be hidden from the client, which has a consistent endpoint to access the application regardless of the location or number of Pods. Hence, specifically, we will cover the following topics in this chapter:

  • What LBs are available in AWS, and how to choose the right one for your needs
  • How EKS can create and use AWS LBs