1.https://www.percona.com/blog/2016/05/26/monitoring-with-percona-app-for-grafana/
http://pmmdemo.percona.com/
2.https://www.percona.com/blog/2016/02/29/graphing-mysql-performance-with-prometheus-and-grafana/
https://prometheus.io/docs/instrumenting/exporters/
3.https://github.com/grafana