Self-healing

The platform notices failed instances and replaces them without human action. Combined with redundancy, a crash becomes a non-event instead of an incident.

Where it shows up in real systems

  • Auto-scaling group

    Instances are added when CPU exceeds the target and removed when it falls. New instances need a warm-up period before taking traffic, so sudden spikes still hurt: keep enough minimum capacity. Failed instances are replaced automatically.

    In production: AWS Auto Scaling groups, Azure VM Scale Sets, GCP Managed Instance Groups, Kubernetes HPA

  • Container service

    Each replica gets a slice of CPU and memory, so you scale in small steps. The orchestrator restarts crashed replicas and spreads them across zones.

    In production: Kubernetes Deployment, Amazon ECS on Fargate, Google Cloud Run, Azure Container Apps

See it break, then fix it

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