homelab-optimized/docs/services/individual/node-exporter.md

Node Exporter

🟢 Monitoring Service

📋 Service Overview

Property	Value
Service Name	node_exporter
Host	homelab_vm
Category	Monitoring
Difficulty	🟢
Docker Image	prom/node-exporter:latest
Compose File	homelab_vm/prometheus_grafana_hub/docker-compose.yml
Directory	homelab_vm/prometheus_grafana_hub

🎯 Purpose

node_exporter is a monitoring and observability tool that helps track system performance and health.

🚀 Quick Start

Prerequisites

• Docker and Docker Compose installed
• Basic understanding of REDACTED_APP_PASSWORD
• Access to the host system (homelab_vm)

Deployment

# Navigate to service directory
cd homelab_vm/prometheus_grafana_hub

# Start the service
docker-compose up -d

# Check service status
docker-compose ps

# View logs
docker-compose logs -f node_exporter

🔧 Configuration

Docker Compose Configuration

container_name: node_exporter
image: prom/node-exporter:latest
ports:
- 9100:9100
restart: unless-stopped

Environment Variables

No environment variables configured.

Port Mappings

Host Port	Container Port	Protocol	Purpose
9100	9100	TCP	Service port

Volume Mappings

No volumes mounted.

🌐 Access Information

Service ports: 9100:9100

🔒 Security Considerations

• ⚠️ Consider adding security options (no-new-privileges)
• ⚠️ Consider running as non-root user

📊 Resource Requirements

No resource limits configured

Recommended Resources

• Minimum RAM: 512MB
• Recommended RAM: 1GB+
• CPU: 1 core minimum
• Storage: Varies by usage

Resource Monitoring

Monitor resource usage with:

docker stats

🔍 Health Monitoring

⚠️ No health check configured Consider adding a health check:

healthcheck:
  test: ["CMD", "curl", "-f", "http://localhost:PORT/health"]
  interval: 30s
  timeout: 10s
  retries: 3

Manual Health Checks

# Check container health
docker inspect --format='{{.State.Health.Status}}' CONTAINER_NAME

# View health check logs
docker inspect --format='{{range .State.Health.Log}}{{.Output}}{{end}}' CONTAINER_NAME

🚨 Troubleshooting

Common Issues

Service won't start

• Check Docker logs: docker-compose logs service-name
• Verify port availability: netstat -tulpn | grep PORT
• Check file permissions on mounted volumes

Can't access web interface

• Verify service is running: docker-compose ps
• Check firewall settings
• Confirm correct port mapping

Performance issues

• Monitor resource usage: docker stats
• Check available disk space: df -h
• Review service logs for errors

Metrics not collecting

• Check target endpoints are accessible
• Verify configuration syntax
• Check network connectivity

Useful Commands

# Check service status
docker-compose ps

# View real-time logs
docker-compose logs -f node_exporter

# Restart service
docker-compose restart node_exporter

# Update service
docker-compose pull node_exporter
docker-compose up -d node_exporter

# Access service shell
docker-compose exec node_exporter /bin/bash
# or
docker-compose exec node_exporter /bin/sh

📚 Additional Resources

• Official Documentation: Check the official docs for node_exporter
• Docker Hub: prom/node-exporter:latest
• Community Forums: Search for community discussions and solutions
• GitHub Issues: Check the project's GitHub for known issues

🔗 Related Services

Services REDACTED_APP_PASSWORD node_exporter:

• Grafana
• Prometheus
• Uptime Kuma
• Node Exporter

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This documentation is auto-generated from the Docker Compose configuration. For the most up-to-date information, refer to the official documentation and the actual compose file.

Last Updated: 2025-11-17
Configuration Source: homelab_vm/prometheus_grafana_hub/docker-compose.yml