LOKI-GRAFANA

Low-cost label-indexed log aggregator.

Definition

Loki architecture: Distributor (ingest), Ingester (write S3/GCS), Querier (LogQL), Compactor, Ruler. LogQL syntax inspired by PromQL. Promtail (deprecated 2024) → Grafana Alloy collector. Loki v3 (August 2024) introduces Bloom Filters for rapid lookup.

Origin

Announced by Grafana Labs at KubeCon 2018 ; v1.0 released November 2019.

Example in context

A DevOps team ingests 100 TB of Kubernetes logs per day into Loki on S3 with $500/month cost (vs $15K Elasticsearch).

Related terms

• Mimir — metrics twin.