Hello hello,

I would like to monitor our production kamailio cluster (5.3) with prometheus and I was in the beginning so happy to spot the xhhtp_prom module.
But when we enabled it, the output was in view of prometheus malformed in combination with the usrloc module, we got the following output:

kamailio_usrloc_location-contacts 0 1597934423943
kamailio_usrloc_location-expires 0 1597934423943
kamailio_usrloc_location-users 0 1597934423943

Prometheus only accepts “_”   instead of “-“. So unfortunately I get "strconv.ParseFloat: parsing "-contacts": invalid syntax” on the prometheus primary node, when I activated the scraper.
This has been issued in the master branch of kamailio with a sanatize function for that problem. But I would like to avoid compiling modules by myself, because this can be messy from time to time.
That´s why my question, is there maybe another way of fixing this?

I really appreciate any comments here and thanks for your time,
Tim Unkrig
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