What is Grafana

• Grafana is a free and open source visualization tool mostly used with Prometheus to which monitor metrics.
• Grafana provides various dashboards, charts, graphs, alerts for the particular data source.
• Grafana allows us to query, visualize, explore metrics and set alerts for the data source which can be a system, server, nodes, cluster, etc.
• We can also create our own dynamic dashboard for visualization and monitoring.
• We can save the dashboard and can even share with our team members which is the main advantage of Grafana
• By default it uses port 3000

What is Node Exporter

• Node exporter is one of the Prometheus exporters which is used to expose servers or system OS metrics.
• With the help of Node exporter we can expose various resources of the system like RAM, CPU utilization, Memory Utilization, disk space.
• Node exporter runs as a system service which gathers the metrics of your system and that gathered metrics is displayed with the help of Grafana visualization tool.
• By default it uses port 9100

Setup a Prometheus Server on Ubuntu

Prequisite

• Any System OS as server.
• Root user account with sudo privilege.
• Sufficient storage on your system and good internet connectivity.
• Any Web Browser.
• Open Port:-
  • 9090 (Prometheus)
  • 3000 (Grafana)
  • 9100 (Node Exporter)