Kubernetes on AWS (EKS) Deep Dive

1. Introduction

Amazon Elastic Kubernetes Service (EKS) is a managed Kubernetes service that simplifies Kubernetes cluster management. This lesson covers key concepts, definitions, and processes to efficiently deploy and manage Kubernetes on AWS using EKS.

2. EKS Architecture

EKS is built on the foundation of AWS infrastructure, allowing users to scale their applications easily. The architecture consists of:

• EKS Control Plane: Managed by AWS, responsible for the Kubernetes control layer.
• Worker Nodes: EC2 instances running your containerized applications.
• Networking: VPC and subnets to configure cluster networking.
• Load Balancing: Integration with AWS Elastic Load Balancer for traffic distribution.

3. Setup EKS

Follow these steps to set up an EKS cluster:

1. Install AWS CLI and kubectl.
2. Create an IAM role for EKS.
3. Use the following command to create a new EKS cluster:

aws eks create-cluster --name my-cluster --role-arn arn:aws:iam::123456789012:role/EKS-Cluster-Role --resources-vpc-config subnetIds=subnet-abcde123,subnet-fghij456,securityGroupIds=sg-0123456789
                    

4. Configure your kubeconfig file:

aws eks update-kubeconfig --name my-cluster
                    

5. Launch worker nodes using AWS CloudFormation or the AWS Management Console.
6. Verify the cluster is up and running:

kubectl get svc
                    

4. Best Practices

Implement the following best practices for optimal EKS usage:

• Use IAM roles for service accounts for fine-grained permissions.
• Regularly update your cluster and worker nodes for security.
• Utilize VPC CNI for better network performance.
• Monitor cluster health using CloudWatch and Prometheus.
• Use Helm for managing Kubernetes applications.

5. FAQ