This is my setup on all my raspberrypis. I have not be been able to figure out how to monitor a cluster though. I saw that grafana free tier doesn’t allow a cluster of servers getting monitored. I have telegraf + influxdb + grafana installed on all my servers.

Could you expand on what you mean by:

> grafana free tier doesn’t allow a cluster of servers getting monitored.

Is there a particular aspect of the cluster you're missing? Is it that you don't want individual server metrics?

I have telegraf + influxdb + grafana-server installed on each of my Rpis giving me multiple dashboards. I want only one grafana-server dashboard where all the telegraf metrics could be seen.

vmagent + victoriametrics :)