structured-logging

To implement JSON structured logging with correlation IDs in FastAPI, add the CorrelationIdMiddleware to your application. This enforces machine-readable JSON output and automatically propagates correlation IDs to trace requests across services.

Correlation IDs are needed for frontend and backend observability to trace a single user interaction across your full stack. By propagating this unique identifier, you can pinpoint related logs from both the frontend Logger class and backend structlog instances to quickly find an issue's exact cause.

The best way to standardize log levels for full stack request tracing is to enforce consistent ERROR, WARNING, INFO, and DEBUG severities across both frontend and backend applications. This ensures clear communication of event severity during debugging and monitoring.

Sensitive data redaction in JSON structured logging works by providing specific middleware and logger configuration guidelines that prevent logging confidential information like passwords and API keys. This ensures consistent output and safe data handling across your stack.

Yes, you can use structlog for backend debugging alongside a frontend Logger class. This combination enforces JSON-structured logging with contextual metadata, facilitating consistent observability and effective debugging across your full stack.