📊 Monitoring a Node with Grafana & Prometheus

Monitor blockchain nodes with real-time charts and alerts.

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🔹 What You'll Monitor

Metric	Importance	Prometheus Query
CPU Usage	Avoid overload	node_cpu_seconds_total{mode!="idle"}
RAM Usage	Detect memory pressure	node_memory_MemAvailable_bytes
Disk Space	Prevent sync/storage failure	node_filesystem_avail_bytes
Network I/O	Check if syncing and broadcasting	node_network_receive_bytes_total

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🔹 Step 1: Install Prometheus

sudo apt update
sudo apt install prometheus

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🔹 Step 2: Configure Prometheus

sudo nano /etc/prometheus/prometheus.yml

Edit:

global:
  scrape_interval: 15s

scrape_configs:
  - job_name: 'node'
    static_configs:
      - targets: ['localhost:9100']

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🔹 Step 3: Install Node Exporter

sudo apt install prometheus-node-exporter

📍 Metrics available at:

http://<your-vps-ip>:9100/metrics

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🔹 Step 4: Install Grafana

sudo apt install -y software-properties-common
sudo add-apt-repository "deb https://packages.grafana.com/oss/deb stable main"
sudo apt update && sudo apt install grafana -y

sudo systemctl start grafana-server
sudo systemctl enable grafana-server

Access Grafana at:

http://<your-vps-ip>:3000

Login: admin / admin

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🔹 Step 5: Connect Grafana to Prometheus

1. Go to Configuration > Data Sources
2. Add Prometheus
3. Set URL: http://localhost:9090
4. Click Save & Test

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🔹 Step 6: Import Node Dashboard

1. Go to Create > Import
2. Use ID 1860 for Node Exporter Full
3. Select your Prometheus data source
4. Click Import

🎉 Now you're monitoring everything in Grafana!