Cloudflare Workers Observability Production-grade observability for Cloudflare Workers: logging, metrics, tracing, and alerting. Quick Start Critical Rules 1. Always use structured JSON logging - Plain text logs are hard to parse and aggregate 2. Include request context - Request ID, method, path in every log entry 3. Never log sensitive data - Redact tokens, passwords, PII from logs 4. Use appropriate log levels - ERROR for failures, WARN for recoverable issues, INFO for operations 5. Sample high-volume logs - Use 1-10% sampling for request logs in production Observability Components | Compo…