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Complete Amazon EKS Cluster Build with Terraform & ALB

EKS Architecture

Creating a functional Amazon EKS cluster from scratch requires configuring VPC subnet discovery tags, managed node groups, VPC CNI prefix delegation, and the AWS Load Balancer Controller.

📁 Source Code: aws-eks-terraform / EKS-Cluster-ALB

📺 Video Walkthrough

What's Included

  • VPC: 2 private subnets for worker nodes and 2 public subnets with ELB discovery tags.
  • EKS Cluster: Kubernetes 1.31+ with API-only access authentication (EKS Access Entries).
  • Managed Node Group: Single Spot instance running optimized Bottlerocket OS.
  • VPC-CNI Add-on: Enabled with prefix delegation for high pod density.
  • AWS Load Balancer Controller: Deployed via Helm to provision ALBs in ip target mode.