Lab 8 - T.Shekhmametyev

[Littlepr1nce]

Goal

Add Prometheus and Grafana to the Lab 6 stack, provision a Golden Signals dashboard, and configure a sustained high-error-rate alert with a runbook.

Changes

• Added Prometheus scraping for QuickNotes metrics
• Added Grafana with provisioned datasource and dashboard
• Added Golden Signals dashboard (Traffic, Error Ratio, Latency Proxy, Saturation)
• Added High Error Rate alert (>5% for 5m)
• Added severity=page label and runbook annotation
• Added docs/runbook/high-error-rate.md
• Updated submissions/lab8.md

Testing

• Prometheus target is up
• Grafana provisions datasource and dashboard automatically
• Golden Signals dashboard displays metrics correctly
• Alert transitioned Normal → Pending → Firing
• Alert includes severity=page and runbook URL
• Screenshots included in submissions/lab8.md

Checklist

• Lab 8 tasks completed
• Title is a clear sentence (≤ 70 chars)
• Commits are signed (git log --show-signature)
• submissions/lab8.md updated