Grafana Loki – Log Aggregation

Loki is a horizontally scalable log aggregation system designed to be cost-effective and easy to operate — "like Prometheus, but for logs."

• GitHub: github.com/grafana/loki (25 000+ ⭐)
• License: AGPL-3.0
• Security: Grafana Labs-backed. No malware.

Environment Variables

Variable	Description
{{LOKI_URL}}	Base URL of the Loki instance

Usage Examples

Push log entries

curl -s -X POST "{{LOKI_URL}}/loki/api/v1/push" \
  -H "Content-Type: application/json" \
  -d '{"streams": [{"stream": {"app": "myapp"}, "values": [["'$(date +%s)000000000'", "Log message"]]}]}'

Query logs

curl -s "{{LOKI_URL}}/loki/api/v1/query_range" \
  --data-urlencode 'query={app="myapp"}' \
  --data-urlencode "start=$(date -d '1 hour ago' +%s)000000000"

AI Agent Tips

• Uses labels for indexing, not full-text — extremely cost-effective.
• LogQL query language is similar to PromQL.
• Native integration with Grafana dashboards.
• Pairs with Promtail, Alloy, or Fluentd for log collection.