ECS Service Discovery: Cloud Map, Service Connect, or an Internal Load Balancer? (opens in new tab)

ECS Service Discovery: Cloud Map vs Service Connect Originally published at Cloud Map, Service Connect, or an internal ALB? A practical decision framework for ECS Fargate teams — with the July 2025 blue/green unblock, real cost math, and Terraform snippet. Guide TL;DR AWS docs say "We recommend Service Connect" for new ECS-to-ECS traffic — built-in retries, metrics, and mTLS without extra config. Blue/green + Service Connect shipped July 17, 2025. The main reason teams stayed on Cloud Map is ...