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(Timescale-Prometheus team lead here) I'd suggest using Timescale-Prometheus to connect Prometheus with TimescaleDB.

Repo: https://github.com/timescale/timescale-prometheus Design Doc: https://tsdb.co/prom-design-doc

You can use Prometheus on top of TimescaleDB. Timescale builds connector and entire workflow to run Prometheus on top of TimescaleDB and support Grafana in flexible way. Sorry for the promo :) check for details in https://github.com/timescale/timescale-prometheus

Thanks!

Prometheus is a monitoring system (it collects metrics and evaluates alerts on them), while TimescaleDB is a database. While it is possible to use TimescaleDB as a remote storage for Prometheus, I'd recommend taking a look at other remote storage integrations as well [1]. Some of them natively support PromQL (like VictoriaMetrics, m3db, Cortex), others may be easier to setup and operate. For instance, VictoriaMetrics works out of the box without complex configuration. Disclaimer: I work for VictoriaMetrics :).

[1] https://prometheus.io/docs/operating/integrations/#remote-en...