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

Understanding IRSA

Firstly, let’s look at how IAM role assignment works for standard EC2 instances. In AWS IAM, roles are used to allocate permissions (using one or more policies). A role can be assigned to an EC2 instance using an instance profile, which is simply a container for the IAM role that’s attached to a specific EC2 instance.

Figure 13.1 – EC2 role assignment

Figure 13.1 – EC2 role assignment

When an EC2 instance is created and assigned a role, the AWS platform will automatically create an instance profile. When that instance boots up, it will make a network call to the instance metadata service (IMDS), which runs in the VPC at the well-known address, 169.254.169.254, and query what (if any) instance profile (or role) is assigned to that instance. If one has been assigned, it can retrieve the access credentials, an example of which is shown next. These credentials consist of the access and secret keys, which are used for all AWS API calls and identify the...