Aspire Service Defaults

Aspire Service Defaults

When to Use This Skill

Use this skill when:

• Building Aspire-based distributed applications
• Need consistent observability (logging, tracing, metrics) across services
• Want shared health check configuration
• Configuring HttpClient resilience and service discovery

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What is ServiceDefaults?

ServiceDefaults is a shared project that provides common configuration for all services in an Aspire application:

• OpenTelemetry - Logging, tracing, and metrics
• Health Checks - Readiness and liveness endpoints
• Service Discovery - Automatic service resolution
• HTTP Resilience - Retry and circuit breaker policies

Every service references this project and calls AddServiceDefaults().

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Project Structure

src/
  MyApp.ServiceDefaults/
    Extensions.cs
    MyApp.ServiceDefaults.csproj
  MyApp.Api/
    Program.cs  # Calls AddServiceDefaults()
  MyApp.Worker/
    Program.cs  # Calls AddServiceDefaults()
  MyApp.AppHost/
    Program.cs

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ServiceDefaults Project

Project File