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External Metrics Exporter

Open source project that discovers external dependencies of Kubernetes workloads and exposes a vendor-neutral Prometheus contract.

Observed problem

Teams deploy on Kubernetes without reliable visibility on external dependencies or comparable signals across vendors.

Context

Platform observability component — automatic discovery, Prometheus contract, vendor neutrality.

Etienne’s role

Author and maintainer

Decisions

  • Discover external dependencies from workloads, not manual inventories
  • Expose a vendor-neutral Prometheus contract
  • Reduce cognitive load with actionable signals

Design principles

  • Useful signals, not more dashboards
  • Vendor neutrality in the export contract
  • Automatic discovery rather than static inventory

What actually exists

  • Public repository Simplifi-ED/external-metrics-exporter
  • Prometheus / Kubernetes integration

Limits

  • No adoption metrics (stars, downloads) presented as main argument
  • No promise of exhaustive vendor coverage without up-to-date documentation

Learnings

  • Useful observability starts with ignored external dependencies
  • A neutral contract avoids platform governance lock-in

Current state

Production — published and maintained under Simplifi-ED.

Proof

  • GitHub — Simplifi-ED/external-metrics-exporter

    Repository public et documentation.

    Open