Auto-healing means the automatic detection and recovery of failed or unhealthy resources (like servers, containers, or applications) — without human intervention.
⚙️ How Auto-Healing Works:
1. Monitoring:
AWS services (like CloudWatch, Elastic Load Balancing, or Auto Scaling) constantly monitor the health of resources.
2. Detection:
When a resource (like an EC2 instance) becomes unhealthy or stops responding, it’s detected automatically.
3. Replacement / Recovery:
The system terminates the unhealthy instance and launches a new one to maintain performance and availability.
🧩 Example in AWS:
🖥️ Auto Scaling Group (ASG)
• An ASG manages a group of EC2 instances.
• If one instance fails (due to hardware or OS crash),
👉 Auto Scaling automatically terminates the failed one and creates a new instance.
• This ensures your application stays healthy and available at all times.
📍This is auto-healing in action.