Observability Engineering

A book-shaped table of contents for observability engineering: foundations through architecture, metrics, logging, tracing, profiling, OpenTelemetry, instrumentation, Kubernetes/cloud, data platforms, visualization, alerting, SRE integration, cost, security, platform engineering, AI-driven operations, and MAANG interview preparation — cross-linking existing prometheus/grafana-cloud/kubernetes/sre/platform-engineering notes instead of duplicating them.

2 — Multi Tenancy

Covers the isolation guarantees a shared observability platform must enforce so one tenant can never read another’s telemetry.

3 — Data Privacy

Covers the privacy obligations that apply to telemetry data specifically, distinct from the privacy obligations on the underlying application data.

4 — PII Redaction

Covers how PII ends up in telemetry by accident (log lines, span attributes, user IDs) and where in the pipeline to catch it.

6 — Audit Logging

Covers the query audit log — who ran what query against what data — as security telemetry about the platform itself.