Prometheus : Visualize on Grafana

	Web UI is included in Prometheus but it's also possible to visualize time series data on Grafana.
[1]	Install Grafana, refer to here. It's OK to install it on any Node. (install it on Prometheus server Node on this example)
[2]	Access to Grafana Dashboard and Open [Configuration] - [Data Sources] on the left menu.

[3]	Click [Add data source].

[4]	Click [Prometheus].

[5]	Input Prometheus Server endpoint URL on [URL] field and Click [Save & Test] button which is bottom of the page. If you enabled authentication or HTTPS, set parameters for them, too.

[6]	The message [Data source is working] is shown if that's OK.

[7]	Next, Open [Dashboard] - [New dashboard] on the left menu.

[8]	Click [Add a new panel].

[9]	Select a query you'd like to visualize data on [Metrics] field.

[10]	After selecting a query, visualized graph is shown. To save [Dashboard], Click [Save] button.

[11]	Set any Dashboard name and Click [Save] button.

[12]	To add more queries, it's possible to put more Graphs on a Dashboard.