automatic instance repairs

Automatic instance repairs in Azure Virtual Machine Scale Sets provide built-in health monitoring and self-healing for VM instances. When a VM is detected as unhealthy based on application health probes or instance status checks, the repair action automatically replaces it with a new healthy instance. This feature is bundled by default with automatic zone balancing in Azure VMSS, ensuring that instance-level health protection complements zone-level resilience. The repair workflow follows a create-before-delete approach to minimize service disruption. For cloud operators managing scale sets across availability zones, automatic instance repairs reduce manual intervention and help maintain application availability.