Production Validation Before Public Rollout: Zero-Downtime Deployments on ECS

This approach solves a critical deployment challenge: validating new releases in a production environment before exposing them to customers, while maintaining zero-downtime deployments. By using ALB-based IP routing instead of traditional CodeDeploy orchestration, teams can catch production-specific issues during internal testing rather than after public release. The Terraform-based implementation offers a reusable pattern that simplifies deployment workflows while eliminating the need for separate staging infrastructure.