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How do you implement health checks?

Senior ASP.NET Web API
Quick Answer Health checks: AddHealthChecks() with checks for DB, Redis, message queues, external APIs. MapHealthChecks("/health/ready") and MapHealthChecks("/health/live"). HealthCheckPublisher for pushing metrics to monitoring systems. UI: add AspNetCore.HealthChecks.UI for a visual dashboard. Tag checks (db, cache) and filter by tag in separate endpoints for different probe types.

Answer

Health checks monitor service and dependency availability.

  • Use Microsoft.Extensions.Diagnostics.HealthChecks.
  • Expose a /health endpoint.
  • Check database connections, external APIs, disk, cache, etc.
  • Integrate with monitoring tools (Kubernetes, Azure, AWS, Prometheus).
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