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

Choosing the right load balancer for your needs

One of the key characteristics of a modern, cloud-based application is to be able to scale horizontally (adding more instances to meet demand or recover from failure). In Chapter 4, we looked at how you can use deployments to create and manage multiple Pods, but you also need to distribute user traffic over those Pods. This is what an LB does, and we will work with two main types in EKS: the Application Load Balancer (ALB) and the Network Load Balancer (NLB), which are both types of ELB. In the next two sections, we will consider two key concepts that can be applied to any LB.

Concept 1 – understanding Layer 4 and Layer 7 load balancer networking

When we talk about layers in a networking context, we are talking about the Open Systems Interconnection (OSI) model, which was developed in the 1980s to simplify interconnection between different networks. The OSI model describes a seven-layer model in which the top layer, Layer...