Portal | Level: L2: Operations | Topics: Prometheus, Kubernetes Networking | Domain: DevOps & Tooling

Symptoms: Grafana Dashboard Empty, Prometheus Scrape Blocked by NetworkPolicy

File	Purpose
symptoms.md	Problem statement and observable symptoms
questions.md	Diagnostic questions to work through
investigation.md	Full investigation path across domains
remediation.md	Cross-domain fix and verification
grading.md	Self-assessment rubric

Cross-domain incident study — see cross-domain index for context.

Pages that link here

• API Gateways & Ingress - Primer
• Alerting Rules - Skill Check
• Alerting Rules Drills
• Capacity Planning - Primer
• Cilium & eBPF Networking - Primer
• Cross-Domain Incident Case Studies
• Grading Rubric
• Kubernetes Networking - Primer
• Kubernetes Services & Ingress - Primer
• Log Analysis & Alerting Rules (PromQL / LogQL) - Primer
• OpenTelemetry - Primer
• Ops Archaeology: The 5% That Can't Resolve
• Primer
• Primer
• Production Readiness Review: Answer Key

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Prerequisites

• Observability Deep Dive (Topic Pack, L2)

Related Content

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• Capacity Planning (Topic Pack, L2) — Prometheus
• Case Study: CNI Broken After Restart (Case Study, L2) — Kubernetes Networking
• Case Study: Canary Deploy Routing to Wrong Backend — Ingress Misconfigured (Case Study, L2) — Kubernetes Networking
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