I second the Thanos link, but if you want to only use Prometheus, I would look into federation: https://www.robustperception.io/scaling-and-federating-promethe

I second the Thanos link, but if you want to only use Prometheus, I would look into federation: https://www.robustperception.io/scaling-and-federating-prometheus https://www.robustperception.io/scaling-and-federating-prome... https://prometheus.io/docs/prometheus/latest/federation/ https://prometheus.io/docs/prometheus/latest/federation/ You can set up a new "cold storage" Prometheus with a longer retention that scrapes select metrics from your regular 30d Prometheus to store for longer periods of time.