Grafana Loki
ELI5 — The Vibe Check
Grafana Loki is log aggregation that doesn't cost a fortune. Unlike Elasticsearch which indexes every word, Loki only indexes metadata labels and stores raw logs cheaply. It's 'grep for your distributed system' — works great with Grafana dashboards. Think Prometheus, but for logs.
Real Talk
Grafana Loki is a horizontally-scalable, multi-tenant log aggregation system inspired by Prometheus. It indexes only metadata labels, not full log content, making it cost-effective at scale. Queries use LogQL, a Prometheus-inspired query language. Integrates natively with Grafana for visualization.
When You'll Hear This
"Loki cut our logging costs by 80% compared to Elasticsearch." / "LogQL queries feel just like PromQL — our team picked it up in a day."
Related Terms
Fluentd
Fluentd is a log router — it collects logs from everywhere and sends them wherever you want. Kubernetes? Send to Elasticsearch. Application logs?
Grafana
Grafana is the visualization layer for all your monitoring data.
Log Aggregation
Log Aggregation collects logs from all your servers, containers, and services into one searchable place.
Prometheus
Prometheus scrapes your services every 15 seconds asking 'how are you?' and stores the answers (metrics) as time series.