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Cost Optimization

EC2 Cost Savings​

1. Use Reserved Instances

  • 1-year or 3-year commitment
  • Up to 72% savings vs on-demand
  • Good for steady-state workloads

2. Use Spot Instances

  • Up to 90% discount
  • Good for fault-tolerant workloads
  • Can be interrupted

3. Right-Sizing

# Use AWS Compute Optimizer
aws compute-optimizer get-ec2-instance-recommendations

EKS Cost Optimization​

1. Use Fargate for Variable Workloads

  • Pay only when pods run
  • No idle node costs

2. Use Spot Instances for Worker Nodes

# eksctl config for spot instances
nodeGroups:
  - name: spot-workers
    instancesDistribution:
      instanceTypes: ["t3.medium", "t3.large"]
      onDemandBaseCapacity: 0
      onDemandPercentageAboveBaseCapacity: 0
      spotInstancePools: 2

3. Set Resource Limits

resources:
  requests:
    memory: "256Mi"
    cpu: "250m"
  limits:
    memory: "512Mi"
    cpu: "500m"

Optimize AWS costs with reserved instances, spot instances, and proper resource sizing!