Prometheus
Time-series metrics for cloud-native
Observability / Metrics · Apache-2.0 · 66.7k
Reviewed 2026-08-19 · last push 2026-10-21 · repo checked 2026-10-21
What's Good
Pull-based collection simplifies service discovery. PromQL enables powerful queries. The exporters ecosystem covers everything. CNCF graduated project means long-term support.
The Catch
Single-node storage limits scale. PromQL has a learning curve. High cardinality labels cause problems.
Verdict
The foundation of cloud-native metrics.
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- BeszelMIT lightweight server + Docker monitoring — PocketBase hub, tiny agents, alerts
- node_exporterApache-2.0 official Prometheus host-metrics exporter
- NetdataGPL-3.0 per-second monitoring agent with auto-discovery, alerts and ML anomaly detection