Grafana PostgreSQL Datasource - Native Plugin

Grafana ships with a built-in PostgreSQL data source plugin that allows you to query and visualize data from a PostgreSQL compatible database.

##Adding the data source

Open the side menu by clicking the Grafana icon in the top header.
In the side menu under the Dashboards link you should find a link named Data Sources.
Click the + Add data source button in the top header.
Select PostgreSQL from the Type dropdown.

http://docs.grafana.org/features/datasources/postgres/