Installing Prometheus, Victoriametrics, Grafana
Install Prometheus with node_exporter
For CENTOS7 https://www.fosslinux.com/10398/how-to-install-and-configure-prometheus-on-centos-7.htm
For CENTOS8 https://www.linuxtechi.com/install-prometheus-monitoring-tool-centos-8-rhel-8/ or https://computingforgeeks.com/how-to-install-prometheus-on-rhel-8/
node_exporter metrics are at: http://graf:9100/metrics
prometheus metrics are at: http://graf:9090/metrics
Inpect your prometheus targets by pointing web browser to: http://graf:9090/targets
Install VictoriaMetrics
Follow steps here https://copr.fedorainfracloud.org/coprs/antonpatsev/VictoriaMetrics/
VictoriMetrics exposes its own metrics at http://graf:8428/metrics
Install Grafana
For CENTOS7 https://www.fosslinux.com/8328/how-to-install-and-configure-grafana-on-centos-7.htm
For CENTOS8: https://computingforgeeks.com/how-to-install-grafana-on-rhel-8/
Grafana exposes its own metrics at http://graf:3000/metrics
More Prometheus Exporters
https://prometheus.io/docs/instrumenting/exporters/