Knowledge Share
Technical articles, tutorials, and insights
Open Source Project #195: OpenTelemetry Demo (Astronomy Shop) — The Official Distributed Observability Sandbox: 12 Languages, 17 Microservices, 13 Fault Switches, Used by 50+ Cloud Vendors for Integration Demos
OpenTelemetry's official demo system — a real e-commerce microservice app called Astronomy Shop that demonstrates Traces/Metrics/Logs across 17 services in 12 languages (.NET/Go/Java/Kotlin/Python/Rust/Ruby/PHP/C++/TypeScript/JavaScript/Elixir). 13 toggleable fault scenarios (memory leaks, CPU spikes, unreachable services, Kafka backlog). Full visualization stack: Grafana + Jaeger + Prometheus. Datadog, Elastic, AWS, GCP, New Relic, and 50+ more vendors use this as their OTel integration demo base. Docker or Helm deploy. 3.3k Stars, Apache-2.0.
Open Source Project of the Day (#156): OpenDataLoader PDF — The #1 Ranked Open-Source PDF Parser, Built for RAG
OpenDataLoader PDF by Hancom and veraPDF developers scores 0.907 overall and 0.928 on table extraction across 200 real-world PDFs — top of open-source benchmarks. XY-Cut++ reading order algorithm, built-in AI safety filtering, automatic accessibility tagging. LangChain native integration, runs locally with no GPU. 26.8k Stars, Apache-2.0.