[tor-relays] tor prometheus metrics -> expected label value, got "INVALID"

Hej,

I just found out about the integrated prometheus exporter in tor - yay, thanks for that!

I can scrape it with curl:

$ curl http://<ip>:9035/metrics # HELP tor_hs_rdv_num_total Total number of rendezvous circuit created # TYPE tor_hs_rdv_num_total counter tor_hs_rdv_num_total{onion=<onionv3adr>} 4 # HELP tor_hs_app_write_bytes_total Total number of bytes written to the application # TYPE tor_hs_app_write_bytes_total counter tor_hs_app_write_bytes_total{onion=<onionv3adr>,port=80} 15211 # HELP tor_hs_intro_num_total Total number of introduction received # TYPE tor_hs_intro_num_total counter tor_hs_intro_num_total{onion=<onionv3adr>} 4 # HELP tor_hs_rdv_established_count Total number of established rendezvous circuit # TYPE tor_hs_rdv_established_count gauge tor_hs_rdv_established_count{onion=<onionv3adr>} 1 # HELP tor_hs_app_read_bytes_total Total number of bytes read from the application # TYPE tor_hs_app_read_bytes_total counter tor_hs_app_read_bytes_total{onion=<onionv3adr>,port=80} 319667 # HELP tor_hs_intro_established_count Total number of established introduction circuit # TYPE tor_hs_intro_established_count gauge tor_hs_intro_established_count{onion=<onionv3adr>} 18

Which looks like proper data for me. Unfortunately prometheus thinks otherwise. In the prometheus webGUI under "/targets" it complains:

expected label value, got "INVALID"

The Prometheus config part is:

- job_name: tor_metrics metrics_path: /metrics static_configs: - targets: - <server1>:9035 - <server2>:9035

Servers are running Debian 11, Prometheus 2.32.1 and tor 0.4.6.9-1~d11.bullseye+1

I searched the relays mailinglist and tried to find something in the internet, unfortunately not very successfully.

Any ideas?

Thanks a lot!

fran