EKS Cluster with Karpenter - Multi-Architecture Support

This Terraform configuration deploys an Amazon EKS cluster with Karpenter autoscaling, supporting both x86 and ARM64 (Graviton) instances with Spot and On-Demand pricing.

Prerequisites

• AWS CLI configured with appropriate permissions
• Terraform >= 1.13
• kubectl installed
• Helm installed

Quick Start

1. Initialize and Deploy

# Initialize Terraform
terraform init

# Review the deployment plan
terraform plan

# Deploy the infrastructure
terraform apply

2. Configure kubectl

# Update kubeconfig (replace with your region and cluster name)
aws eks update-kubeconfig --region us-west-2 --name opsfleet-eks

# Verify cluster access
kubectl get nodes

Running Pods on x86 Instances

To deploy a workload specifically to x86 (AMD64) nodes:

kubectl apply -f examples/x86-deployment.yaml

This deployment uses nodeSelector to target x86 nodes:

• kubernetes.io/arch: amd64
• karpenter.sh/nodepool: x86-nodepool

Running Pods on ARM64 (Graviton) Instances

To deploy a workload specifically to ARM64 (Graviton) nodes:

kubectl apply -f examples/arm64-deployment.yaml

This deployment uses nodeSelector to target ARM64 nodes:

• kubernetes.io/arch: arm64
• karpenter.sh/nodepool: arm64-nodepool

Architecture

• EKS Cluster: Latest version (1.28+) in a dedicated VPC
• Karpenter: Node autoscaler with two NodePools (x86 and ARM64)
• Spot & On-Demand: Both instance types supported for cost optimization
• Multi-AZ: High availability across multiple availability zones

Configuration

Key variables can be customized in terraform.tfvars:

• cluster_name: Name of the EKS cluster
• kubernetes_version: Kubernetes version
• aws_region: AWS region for deployment
• vpc_cidr: CIDR block for VPC

Cleanup

# Remove workloads first
kubectl delete -f examples/

# Destroy infrastructure
terraform destroy

Example Deployments

The examples/ directory contains:

• x86-deployment.yaml: Deploy to x86 nodes
• arm64-deployment.yaml: Deploy to ARM64/Graviton nodes
• mixed-architecture-deployment.yaml: Allow any architecture

Key Features

• Latest EKS version
• Karpenter with x86 and ARM64 node pools
• Spot instance support with interruption handling
• Dedicated VPC with proper networking
• Production-ready security configuration