telegraf problem about go-runtime-metrics HOT 2 OPEN

I forget to say that I'm starting grafana and influxdb with a docker-compose file:

version: "2"
services:
  grafana:
    image: grafana/grafana:4.1.0
    ports:
      - 9090:3000
  influxdb:
    image: influxdb
    ports:
      - 8086:8086

from go-runtime-metrics.

Ok, I just understand that the input in example is wrong. 6060 (or 9090 in my own install) should be 8086, that is the port for influxdb and not graphana. I didn't checked (because the lack of knowledge about telegraf).

Now... the only problem is that I really dont understand what does telegraf and how to configure grafana to use it :)

Could you please make precision in you example ?

Thanks a lot

from go-runtime-metrics.