Promtool should support openmetrics

[roidelapluie]

Promtool should support openmetrics, next to the text format.

Maybe via --format=openmetrics

[ide-rea]

Hi, does this mean check openmetrics format like check prom text format, could you tell me?

[roidelapluie]

This issue is to add support for promtool check metrics --format=openmetrics

[ide-rea]

Thanks, i would like to try if not anybody is working on this.

[ide-rea]

Hi, i'm a little confused about the check rule. Do we parse the text wire openmetrics format into prometheus MetricFamily, and then encoded the metrics into bytes stream, at last use promlint package to do the check? need your help, thanks :) @roidelapluie

[roidelapluie]

This issue would require a openmetrics text parser in go, which does not exist at the moment. We only have a textformat parser in go.

[roidelapluie]

Here is the textparser in go: https://github.com/prometheus/common/blob/main/expfmt/text_parse.go
We should have one openmetrics parser in go for this issue. It should be developed next to the text parser, in the prometheus/common repository.

[ide-rea]

Thanks, i'm understanding the issue better!