How do you design Resilience Pipelines with Polly v8 integrated into .NET 8?

Short answer

Use Microsoft.Extensions.Resilience to combine Retry, Circuit Breaker, Timeout, and Rate Limiter strategies in a unified, flexible pipeline for network calls.

Explanation

Polly v8 was redesigned to be very fast with little extra allocation and officially integrated with .NET HTTP clients through AddResilienceHandler(). You can configure a pipeline with retries using Exponential Backoff and Jitter for unstable networks, a Circuit Breaker that protects your server when a dependency fails, and a maximum timeout for each attempt.

Code example

builder.Services.AddHttpClient("ExternalService")
    .AddStandardResilienceHandler(options => {
        options.Retry.MaxRetryAttempts = 3;
        options.CircuitBreaker.SamplingDuration = TimeSpan.FromSeconds(30);
    });

Common mistakes

• Retrying immediately without Jitter (random delay), causing simultaneous requests that take down a remote server (Thundering Herd Problem).

Follow-up questions

• What is .NET Aspire, and how does it simplify building and monitoring distributed Cloud-Native applications?

Sources

• Microsoft Learn — Build resilient HTTP apps: Key development patterns