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

Summary

In this chapter, we explored the basic concept of networking and the network model in native Kubernetes and how EKS differs. We described how EKS comes configured with the AWS VPC CNI, which integrates with the AWS VPC to assign ENIs and IP addresses to Pods from the VPC.

We also learned that Pods in EKS are native VPC citizens and traffic can use VPC network devices such as Internet Gateway, Transit Gateway, and NAT Gateway, and can be controlled using VPC network controls such as SGs and/or NACLs. However, this can come with some challenges such as VPC IP exhaustion. We discussed a few ways to handle IP exhaustion, including non-routable subnets, prefix addressing, and IPv6.

Finally, we talked about performing common tasks such as managing and upgrading the CNI, disabling CNI source NAT so you can use external NAT devices such as the AWS NATGW, and configuring custom networking so Pods can use other SGs or subnets to the main worker node to help with security or IP...