Monitoring-Stack-with-Node-Exporter-Prometheus-and-Grafana

Monitoring Stack with Node Exporter, Prometheus, and Grafana 📊 Overview 🌍 This project sets up a monitoring stack using Node Exporter, Prometheus, and Grafana to collect and visualize system metrics from a Linux machine (or WSL) using Docker Compose.

Technologies Used: 🛠️ Node Exporter: Collects system metrics. 📈 Prometheus: Scrapes and stores metrics. 🧑‍💻 Grafana: Visualizes metrics in dashboards. 📉 Prerequisites ⚙️ Docker and Docker Compose installed. If not, follow the Docker installation guide. 🐋 WSL 2 (Windows Subsystem for Linux) if running on Windows with Ubuntu. WSL Installation Guide. 🖥️ Basic knowledge of Docker, Prometheus, and Grafana. 📚 Setup Instructions 🛠️

1. Install Node Exporter on Linux/WSL 🔧 Node Exporter collects system metrics and exposes them for Prometheus.

Download and Extract Node Exporter:

wget https://github.com/prometheus/node_exporter/releases/download/v1.9.1/node_exporter-1.9.1.linux-amd64.tar.gz tar xvfz node_exporter-1.9.1.linux-amd64.tar.gz cd node_exporter-1.9.1.linux-amd64 IMG IMG IMG

Run Node Exporter:

./node_exporter Node Exporter will be running on http://localhost:9100. 🌐 IMG Verify Metrics:

Open http://localhost:9100/metrics in your browser. 🌐 Or use curl to verify: curl http://localhost:9100/metrics IMG Note the WSL IP (if needed): If Prometheus is outside WSL, get the WSL IP using:

hostname -I Replace localhost with this IP in prometheus.yml later.

1. Set Up Prometheus & Grafana with Docker Compose 🚢 Prometheus scrapes metrics from Node Exporter and Grafana visualizes them.

Create docker-compose.yml: In your project directory, create the file docker-compose.yml with the following content:

version: ‘3’ services: prometheus: image: prom/prometheus ports: - “9090:9090” volumes: - ./prometheus.yml:/etc/prometheus/prometheus.yml grafana: image: grafana/grafana ports: - “3000:3000” Configure prometheus.yml: Create the file prometheus.yml with the following content:

global: scrape_interval: 15s scrape_configs:

• job_name: ‘node-exporter’ static_configs:
  • targets: [‘:9100'] # Replace with WSL IP if Prometheus is outside WSL Start Services: Run the following command to start Prometheus and Grafana with Docker Compose:

docker-compose up -d IMG 4. Verify Prometheus:

Open http://localhost:9090 in your browser. 🌐 Check that Node Exporter is UP under Status → Targets. ✅

1. Set Up Grafana Dashboard 📊 Grafana provides the visualization layer for metrics collected by Prometheus.

Access Grafana: Open http://localhost:3000 in your browser. 🌐

Default login: admin / admin IMG Add Prometheus Data Source:

Go to Configuration → Data Sources → Add Prometheus. Set the URL to http://prometheus:9090 (or use http://:9090 if Prometheus is not running in Docker). IMG Import Node Exporter Dashboard:

Go to Create (+) → Import → Dashboard ID 1860 IMG (or download the Node Exporter Full Dashboard). Select Prometheus as the data source and click Import. View Metrics: The imported dashboard will display CPU, memory, disk, and network metrics. 📉 IMG

Troubleshooting ⚠️ Docker Integration with WSL: If running on Windows with WSL, make sure Docker Desktop is integrated with your WSL distro. Follow the Docker WSL2 guide for setup. 🖥️ If you run Prometheus outside WSL, make sure to replace localhost with the WSL IP in the prometheus.yml file. 📡

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