build_info metric does not work with OpenTelemetry tracker

[brettimus]

We will need to wait for an upstream fix to the opentelemetry-python project's prometheus metric reader.

There is an open PR to fix this in the opentelemetry-python repo: open-telemetry/opentelemetry-python#3306

[emschwartz]

If the main issue is that it reports it as a counter instead of a gauge, couldn't we just let it be a counter in the meantime? I think all the queries will still work correctly as long as the value of the counter remains at 1

[brettimus]

that's a fair point. what seems to happen though is no build_info metric is defined. only build_info_total

[emschwartz]

Ah, oh course. That's annoying

[brettimus]

opentelemetry-python v1.20 includes the fix for this! i will open a PR that mentions this in the README (that versions before that do not work with build info)

[brettimus]

closed with #92