MetricsPort produces no output

[jarl]

I try to use the metrics port, because i need to know how many sockets tor uses.
In my torrc i added

MetricsPort relay_ip:9035 prometheus
MetricsPortPolicy accept prometheus_ip

The connection seems to work since i get the following when debug logs are enabled:

tor-relay Tor[1352]: connection_handle_listener_read(): Connection accepted on socket 18 (child of fd 6).
tor-relay Tor[1352]: connection_handle_listener_read(): New metrics connection opened from prometheus_ip.
tor-relay Tor[1352]: connection_add_impl(): new conn type Metrics, socket 18, address prometheus_ip, n_conns 9.

But neither prometheus nor wget get any data. It is just an empty response.

Any suggestions where to look next?

[gus]

What’s your Tor version?
Before trying Prometheus, can you try to get manually the data?

Add in your torrc:

MetricsPort 127.0.0.1:9035
MetricsPortPolicy accept 127.0.0.1

And then:

wget http://127.0.0.1:9035/metrics -O /tmp/output.txt

[jarl]

Tor Version: 0.4.6.9

Same behaviour:

--2022-02-22 17:58:33--  http://127.0.0.1:9035/metrics
Connecting to 127.0.0.1:9035... connected.
HTTP request sent, awaiting response... 200 OK
Length: 0 [text/plain]
Saving to: ‘/tmp/output.txt’

/tmp/output.txt                   [ <=>                                            ]       0  --.-KB/s    in 0s      

2022-02-22 17:58:33 (0,00 B/s) - ‘/tmp/output.txt’ saved [0/0]

[GeKo]

jarl via Tor Project Forum:

Tor Version: 0.4.6.9

Same behaviour:

--2022-02-22 17:58:33--  http://127.0.0.1:9035/metrics
Connecting to 127.0.0.1:9035... connected.
HTTP request sent, awaiting response... 200 OK
Length: 0 [text/plain]
Saving to: ‘/tmp/output.txt’

/tmp/output.txt                   [ <=>                                            ]       0  --.-KB/s    in 0s

2022-02-22 17:58:33 (0,00 B/s) - ‘/tmp/output.txt’ saved [0/0]

You need an Tor alpha version for that right now to work, alas.

[jarl]

Is it ok to run an alpha version on the network or will it get rejected by the authorities?

[GeKo]

jarl via Tor Project Forum:

Is it ok to run an alpha version on the network or will it get rejected by the authorities?

It’s perfectly legit.