I have integrated grafana v5.2.1 with nagioscore through pnp4nagios on centos6.9. I followed this link in order to setup grafana.
And add data source in grafana server:
Check the Basic Auth
Under Basic Auth Details populate the username and password (username / password)
Datasource is successfully added and working. But When I created Dashboard + Graph for localhost. It shown only blank graph panel no data shown on the graphs. Please guide me accordingly.