All 15 Health Checks questions
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How do you add pre-built health checks for common external dependencies like SQL Server, Redis, or a URL endpoint, using the community AspNetCore.Diagnostics.HealthChecks packages? How do health checks interact with dependency injection scoping, particularly for checks that need a scoped service like a DbContext? Why should the detailed /health endpoint (with full dependency status breakdown) generally not be exposed publicly on the internet, and how do you restrict access to it? How would you write an integration test verifying that your health check endpoint correctly reports Unhealthy when a dependency is down? How do you differentiate liveness and readiness health checks using tags, and why does Kubernetes treat these two probe types differently? How would you implement a health check that reports Degraded (rather than a binary Healthy/Unhealthy) based on a performance threshold, like elevated database query latency? How would you integrate health check results with the AspNetCore.HealthChecks.UI package to get a persistent, historical dashboard view of health status over time? How would you set a per-check timeout to prevent one slow or hanging dependency check from blocking the entire /health endpoint response indefinitely? How would you implement a startup-specific health check distinct from ongoing liveness/readiness, useful for slow-starting applications with lengthy initialization (like cache warming or large data loads)? How would you design a health check for a service with multiple independent downstream dependencies where you want the overall status to reflect the worst individual result, but also need each dependency's specific status individually visible for diagnostics?
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ASP.NET Core › Health Checks

How would you exclude health check endpoints from other cross-cutting middleware like authentication, logging, or rate limiting that shouldn't apply to frequent automated health polling?

Intermediate

Answer

Since health endpoints are typically polled very frequently by automated infrastructure (every few seconds by a load balancer or orchestrator), it's common to exclude them from middleware not relevant to that traffic -- achieved by ordering MapHealthChecks appropriately relative to other middleware registrations, or by explicitly checking and skipping the health check path within custom middleware, preventing noisy logs or unnecessary rate-limit consumption from routine health polling.
app.UseWhen(
    context => !context.Request.Path.StartsWithSegments("/health"),
    appBuilder => appBuilder.UseMiddleware<RequestLoggingMiddleware>()
);

app.MapHealthChecks("/health");
Real-world example A team notices their centralized logging system is flooded with thousands of routine health-check log entries per hour, and fixes it by wrapping their logging middleware in UseWhen to skip the /health path entirely, dramatically reducing log noise without losing any meaningful observability.

Common follow-ups: What other middleware commonly needs similar exclusion for health check paths (rate limiting, authentication)?;How do you balance excluding noise against still wanting to detect abnormal health-check-related traffic patterns?

ASP.NET Core Middleware & Request Pipeline;Logging
All 15 Health Checks questions