Loki

Loki. Is Grafana Labs’ horizontally scalable log aggregation system inspired by Prometheus labels.

Summary

What it is: Log ingest (Promtail, Alloy, or OTel), label-based indexing, LogQL queries in Grafana.

When to use: Grafana-centric observability stack; cost-aware log retention with object storage backends.

When to skip: Full-text SIEM requirements (Splunk, Elasticsearch). Teams without label discipline on logs.

Key features: LogQL, multi-tenancy, boltdb/TSDB schema evolution, Grafana correlations with metrics and traces.

Details

References

• Loki documentation