Are you using Prometheus metrics? And do you already have an instance of Grafana running? If so, the best way to integrate with Grafana is to configure Grafana to query M3DB directly by following
these instructions, setting M3DB as a datasource in Grafana. From there, you can query M3DB via Grafana dashboards. Also, if you are already exposing Prometheus metrics endpoints, then you can add Prometheus remote read/write to your configs in order to send metrics to M3DB.