A Self-Healing AWS ECS Monitoring System with Slack Alerts Using Terraform

Modern cloud applications need more than monitoring they need self-healing infrastructure. Waiting for humans to react to failures increases downtime and risks user impact. In this guide, I’ll show you how to build a system that automatically detects ECS service failures, notifies your team on Slack, and restores the service all using Terraform. Why This Project Matters In containerized environments, services can fail due to application crashes, resource exhaustion, or deployment issues. Traditional monitoring tools detect failures, but manual intervention is slow. A self-healing system solves this by: Detecting failures automatically Restarting services without human intervention Sending alerts to teams in real-time Architecture Overview Here’s how the system works: ECS service health degrades (task crashes, reduced running count) CloudWatch monitors ECS metrics and triggers an alarm when RunningTaskCount < desired count 3.EventBridge captures the alarm state change Lambda executes