What should a developer use to configure auto-healing and CPU-based scale-out actions for a web app?

Azure Monitor Alerts are the correct choice because they allow you to define rules based on metrics (like CPU utilization) or logs, and then trigger automated actions, including auto-healing (e.g., restarting an app) or scaling out resources. This directly addresses the requirement for CPU-based scale-out and auto-healing. Azure Functions are serverless compute services, primarily for executing small pieces of code in response to events, not for configuring monitoring and scaling rules. Azure App Insights is an Application Performance Management (APM) service for monitoring application performance and usage, but it doesn't directly configure auto-healing or scaling actions; it provides the data that Azure Monitor Alerts might use. Azure Logic Apps are cloud-based workflow automation services, useful for orchestrating tasks, but less direct for defining real-time, metric-driven auto-scaling and healing compared to Azure Monitor Alerts.