Integration Cheatsheet 10 — Observability Stack
Cheatsheet: structlog with trace IDs, OTEL auto-instrumentation, Prometheus, slow-query log.
Observability
FastAPI Cheatsheet 10 — Observability: structlog, OTEL, Prometheus
Cheatsheet: structlog with contextvars, OTEL auto-instrumentation, custom spans, Prometheus middleware, /metrics.
FastAPI Textbook Ch. 11 — Observability: Logging, Tracing, and Metrics
Production observability: structlog with contextvars, OTEL tracing, Prometheus metrics, log/trace correlation, and the patterns that pay back.
Kubernetes Cheatsheet 13 — Observability
Cheatsheet: kube-prometheus-stack, Loki, traces, alerts.
Observability Cost Control in 2026 — Cardinality, Sampling, and the Bills That Surprise You
Practical observability cost cuts: cardinality discipline, log sampling, trace tail-sampling, retention tiers, and self-hosting tradeoffs.
Distributed Tracing in 2026 — OpenTelemetry, Trace Context, and What Actually Helps Debugging
Practical distributed tracing: OTEL setup, span design, context propagation across services, head/tail sampling, and the operational realities.
LLM Observability in 2026 — Tracing, Evals, and the Things You Can't Skip
Practical LLM observability: tracing every call, eval harnesses, regression detection, prompt versioning, and how to debug the model in production.
Log Aggregation in 2026 — Loki, ClickHouse, OpenSearch, or Datadog
Picking a log aggregator in 2026: Loki for cheap storage, ClickHouse for query power, OpenSearch for full-text, Datadog when you can pay. Decision matrix and patterns.
Observability 2.0 — SLOs, Wide Events, and the End of Three Pillars
What changed in observability since 2020. Wide events vs three-pillars, SLOs as the unit of conversation, OTel’s role, and how to actually find problems in production.
LLM Observability in 2026 — LangSmith, Langfuse, Helicone, and OpenTelemetry
What to track in LLM apps, the tooling landscape (LangSmith, Langfuse, Helicone, Phoenix), the OTel GenAI conventions, and the metrics-and-traces playbook for production AI.