Description
Monitor system resources and services with systemd, journalctl, node_exporter, and actionable alerts.
Objective
Give administrators early warning of resource exhaustion and service failures on Linux hosts.
Solution
Inspect the host
- 1Identify critical services, resource limits, and normal operating ranges.
- 2Use systemctl, journalctl, top, and df to establish a baseline.
Collect and visualize metrics
- 1Install node_exporter and expose CPU, memory, disk, and filesystem metrics.
- 2Create dashboards and alerts for host and service health.
- 3
bash
systemctl --failed journalctl -u nginx --since today df -h
Respond to failures
- 1Document diagnostic commands and safe restart procedures.
- 2Test alerts by stopping a non-critical service and confirming notification delivery.
Tool Stack Used
- 🔧Linux
- 🔧Systemd
- 🔧Journalctl
- 🔧Node Exporter