Prometheus, Node Exporter & Grafana Explained | Monitoring Stack for Linux Servers

In this video, I explain what Prometheus, Node Exporter, and Grafana actually do and why they are essential for monitoring Linux servers.
If you’ve ever set up the monitoring stack but wondered how these tools work together, this video will give you the complete picture.

Node Exporter – Collects raw Linux system metrics (CPU, memory, disk, network).
Prometheus – Scrapes and stores metrics as time-series data, with PromQL for querying.
Grafana – Visualises metrics with dashboards, graphs, and alerts.
Systemd – Ensures your monitoring stack stays alive by auto-starting on boot and restarting on crash.

Think of it like a car: Node Exporter = sensors, Prometheus = black box recorder, Grafana = dashboard, and Systemd = pit crew keeping everything running.

By the end of this video, you’ll understand:
✔ Why monitoring is essential in production
✔ How Node Exporter, Prometheus, and Grafana fit together
✔ Why running them as systemd services is critical for reliability

▬▬▬▬▬▬▬ Timestamps ▬▬▬▬▬▬▬
00:00 - Introduction
00:20 - Why Monitoring is Essential (Real-World Example)
00:47 - Node Exporter Explained (Linux Metrics)
01:15 - Prometheus Explained (Time Series & Scraping)
01:41 - Grafana Explained (Dashboards & Alerts)
02:18 - Why Systemd Services Matter in Monitoring
02:52 - How the Full Monitoring Stack Works Together
03:27 - Conclusion & Next Steps

For 1:1 mentorship, consultations, or career guidance, you can book a session with me here: https://topmate.io/nikhil_kumar811/

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