How to Monitor Libvirt with Prometheus, Nacos, and Grafana – A Step‑by‑Step Guide

Deploy libvirt‑exporter service

Download the pre‑built libvirt‑exporter binary, make it executable, and start it listening on port 9177.

$ sudo wget https://github.com/srkaviani/prometheus_exporters/raw/main/libvirt_exporter/prometheus-libvirt-exporter
$ sudo chmod +x prometheus-libvirt-exporter
$ ./prometheus-libvirt-exporter -web.listen-address :9177

Register libvirt‑exporter to Nacos

Use a POST request to register the exporter instance with Nacos so that it can be discovered by Prometheus.

$ curl -d 'username=jiaxzeng' \
     -d 'password=' \
     -d 'namespaceId=46f891fb-c1a2-4b67-a0cb-b9d3888ac9be' \
     -d 'serviceName=libvirt-exporter' \
     -d 'ip=172.139.20.1' \
     -d 'port=9177' \
     -d 'ephemeral=false' \
     -X POST 'http://172.139.20.100:8848/nacos/v2/ns/instance'
{ "code":0, "message":"success", "data":"ok" }

Expose Nacos monitor discovery to Prometheus

If the Nacos discovery service has not been deployed, refer to the article “From Static to Dynamic Monitoring: Prometheus + Nacos for Intelligent Operations” for deployment instructions.

Add libvirt monitoring panel in Grafana

Import the provided Grafana dashboard to visualize libvirt metrics collected by Prometheus.

Conclusion

Monitoring the Libvirt service is not only a technical task but also a critical safeguard for business continuity and system stability; mastering these steps equips you with the ability to keep virtualized infrastructures reliable and resilient.