Why Logging Matters
Logging in web applications is more than just printing debug messages. It’s your application’s way of communicating what’s happening, especially when things go wrong.
The Challenge
FastAPI applications face unique logging challenges:
- Async Context: Traditional logging can block async operations
- Framework Integration: Uvicorn has its own logging that needs coordination
- Production Scale: Development logging doesn’t scale to production environments
- Observability: Modern apps need structured logs for monitoring tools
What We’ll Build
This tutorial covers three progressive approaches:
- Basic Logging: Using Python’s standard logging module with custom formatting
- Loguru Integration: Modern logging library with cleaner syntax and better features
- Production Setup: Environment-based configuration with external services
Each approach builds on the previous one, showing you how to evolve your logging as your application grows.
Key Benefits
By the end of this tutorial, you’ll have:
- Consistent log formatting across your application
- Proper integration with FastAPI and Uvicorn
- Environment-specific configurations
- External service integration for monitoring
- Non-blocking log shipping for production
Let’s start with the basics and work our way up to a production-ready solution.