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Prometheus

Open-source metrics and time-series database.

What is Prometheus?

The metrics backbone of cloud-native systems. Prometheus scrapes your services on an interval, stores time-series data, and exposes a powerful query language (PromQL). In the bootcamp we instrument the agent capstones with custom Prometheus metrics so students see what production observability actually looks like.

Key Features

  • Pull-based scraping — no agent on every host
  • PromQL — powerful query language with rate(), histograms, joins
  • Alertmanager for routing alerts to Slack, PagerDuty, etc.
  • Exporters for every common system (node, database, JVM)
  • Federation for multi-cluster setups
  • High-cardinality friendly (with care)

FAQ

What metrics should I instrument for an AI agent? +

Request rate, p95 latency, token usage by model, cost per request, agent loop depth, tool-call success rate, retrieval recall, error rate by category. The bootcamp's observability module covers each one.

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