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Concepts

Lumin is small on purpose. Five concepts and you have the whole product.

  • Projects & API keys — the tenancy boundary. One project owns all the data ingested with its keys; an API key only ever writes to its project.
  • Logs — structured rows with {timestamp, level, service, message, attributes, trace_id}, live-tailable over SSE. Anything else your logger emits, a browser session_id included, travels in attributes.
  • Metrics — Prometheus-shaped counters, gauges, and histograms scraped by the agent. The UI panels assume the canonical http.requests / http.latency_ms / http.errors schema.
  • Checks — HTTP uptime probes that run from Lumin’s servers, not from the agent. Up, degraded, or down every 30 s to 15 min, charted on the dashboard home.
  • Retention — how long Lumin keeps your data and how old data is dropped.

If you want the what-do-I-actually-type version, go to the Quickstart. If you want the how-does-it-fit-together version, read on.