ASPNET Custom Health Checks — Building Application Health Probes

DodaTech Updated 2026-06-28 1 min read

In this tutorial, you'll learn about ASPNET Health Checks Custom. We cover key concepts, practical examples, and best practices to help you understand and apply this topic effectively.

Custom health checks in ASP.NET Core let you validate specific service dependencies like databases, external APIs, and cache stores.

public class RedisHealthCheck : IHealthCheck
{
    private readonly IConnectionMultiplexer _redis;
    public RedisHealthCheck(IConnectionMultiplexer redis) => _redis = redis;

    public async Task<HealthCheckResult> CheckHealthAsync(
        HealthCheckContext context,
        CancellationToken cancellationToken = default)
    {
        try
        {
            var db = _redis.GetDatabase();
            await db.PingAsync();
            return HealthCheckResult.Healthy("Redis is responsive");
        }
        catch (Exception ex)
        {
            return HealthCheckResult.Unhealthy("Redis is unavailable", ex);
        }
    }
}

// Registration
// builder.Services.AddHealthChecks().AddCheck<RedisHealthCheck>("redis");
// app.MapHealthChecks("/health", new HealthCheckOptions { ... });

Health checks enable load balancers and orchestrators to route traffic away from unhealthy instances automatically.

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