rustfs/.docker/observability/README.md

RustFS Observability Stack

This directory contains the comprehensive observability stack for RustFS, designed to provide deep insights into application performance, logs, and traces.

Components

The stack is composed of the following best-in-class open-source components:

• Prometheus (v2.53.1): The industry standard for metric collection and alerting.
• Grafana (v11.1.0): The leading platform for observability visualization.
• Loki (v3.1.0): A horizontally-scalable, highly-available, multi-tenant log aggregation system.
• Tempo (v2.5.0): A high-volume, minimal dependency distributed tracing backend.
• Jaeger (v1.59.0): Distributed tracing system (configured as a secondary UI/storage).
• OpenTelemetry Collector (v0.104.0): A vendor-agnostic implementation for receiving, processing, and exporting telemetry data.

Architecture

1. Telemetry Collection: Applications send OTLP (OpenTelemetry Protocol) data (Metrics, Logs, Traces) to the OpenTelemetry Collector.
2. Processing & Exporting: The Collector processes the data (batching, memory limiting) and exports it to the respective backends:
   • Traces -> Tempo (Primary) & Jaeger (Secondary/Optional)
   • Metrics -> Prometheus (via scraping the Collector's exporter)
   • Logs -> Loki
3. Visualization: Grafana connects to all backends (Prometheus, Tempo, Loki, Jaeger) to provide a unified dashboard experience.

Features

• Full Persistence: All data (Metrics, Logs, Traces) is persisted to Docker volumes, ensuring no data loss on restart.
• Correlation: Seamless navigation between Metrics, Logs, and Traces in Grafana.
  • Jump from a Metric spike to relevant Traces.
  • Jump from a Trace to relevant Logs.
• High Performance: Optimized configurations for batching, compression, and memory management.
• Standardized Protocols: Built entirely on OpenTelemetry standards.

Quick Start

Prerequisites

• Docker
• Docker Compose

Deploy

Run the following command to start the entire stack:

docker compose up -d

Access Dashboards

Service	URL	Credentials	Description
Grafana	http://localhost:3000	admin / admin	Main visualization hub.
Prometheus	http://localhost:9090	-	Metric queries and status.
Jaeger UI	http://localhost:16686	-	Secondary trace visualization.
Tempo	http://localhost:3200	-	Tempo status/metrics.

Configuration

Data Persistence

Data is stored in the following Docker volumes:

• prometheus-data: Prometheus metrics
• tempo-data: Tempo traces (WAL and Blocks)
• loki-data: Loki logs (Chunks and Rules)
• jaeger-data: Jaeger traces (Badger DB)

To clear all data:

docker compose down -v

Customization

• Prometheus: Edit prometheus.yml to add scrape targets or alerting rules.
• Grafana: Dashboards and datasources are provisioned from the grafana/ directory.
• Collector: Edit otel-collector-config.yaml to modify pipelines, processors, or exporters.

Troubleshooting

• Service Health: Check the health of services using docker compose ps.
• Logs: View logs for a specific service using docker compose logs -f <service_name>.
• Otel Collector: Check http://localhost:13133 for health status and http://localhost:1888/debug/pprof/ for profiling.