Go Custom Prometheus Exporter

A production-ready Prometheus exporter in Go that collects system and application metrics.

• System: CPU, Memory, Disk, Network
• App: HTTP request count, latency (histogram)
• Fully containerized with Docker + Prometheus + Grafana

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Live Dashboard

Real-time monitoring
View Live Grafana Snapshot

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Features

• prometheus/client_golang integration
• gopsutil for accurate system metrics
• Simulated HTTP traffic for demo
• Multi-stage Docker build (~15MB final image)
• Ready-to-import Grafana dashboard
• /health endpoint
• Clean, testable, GitHub-ready code

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Quick Start

git clone https://github.com/irvaniamirali/go-prometheus-exporter.git
cd go-prometheus-exporter
docker-compose up -d

Access

Service	URL
Exporter	http://localhost:9091/metrics
Prometheus	http://localhost:9090
Grafana	http://localhost:3000 (admin/admin)

Grafana: Import grafana/dashboard.json → + → Import

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Architecture

[Go Exporter] → /metrics → [Prometheus] → [Grafana Dashboard]

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Collector Pattern (Describe/Collect)

• Counter → Request count
• Gauge → System stats
• Histogram → Latency distribution

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Project Structure

.
├── main.go
├── metrics/
│   ├── system.go     # CPU, RAM, Disk, Network
│   └── app.go        # HTTP requests, latency
├── Dockerfile
├── docker-compose.yml
├── prometheus/prometheus.yml
└── grafana/dashboard.json

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Contributing

1. Fork the repo
2. Create branch: git checkout -b feat/new-feature
3. Commit: git commit -m 'feat: add new feature'
4. Push & open PR