Fargate vs EC2 for EKS

Quick Comparison

AspectFargateEC2 (MNG)
ManagementFully managedPartially managed
PricingPer-pod vCPU/memoryEC2 instance hours
ScalingAutomatic per podNode group scaling
GPU supportNoYes
EBS supportNoYes
SSH accessNoYes
Spot instancesNoYes

When to Use Fargate

  • Stateless workloads
  • Sporadic or unpredictable traffic
  • Short-running jobs
  • Microservices with low compute needs
  • When you want zero node management

When to Use EC2

  • Statefull workloads requiring EBS
  • GPU workloads
  • Cost-sensitive large-scale workloads
  • Need for Spot instances
  • Applications requiring SSH/debug access
  • Windows containers

Cost Comparison

Fargate pricing is typically higher per vCPU-hour but eliminates idle capacity costs.

For bursty workloads: Fargate often cheaper. For steady-state workloads: EC2 Spot often cheaper.

References