Metric name to lower case

[GGonzalezGomez]

Hi everyone,

Apologies for the question, I'm starting to use the opentelemetry collector and some of the features are unknown to me. I have some metrics that are being received with a name containing multiple casing. I've seen a processor named "metricstransform" that can use some regexp but as far as I know it doesn't allow change the case.
Is there any processor (or any way to achieve this) so my metric name remains in lower case?

Thank you all for your help!

[edmocosta]

Hi @GGonzalezGomez, you can use the transform processor for that (see it in action here):

processors:
  transform/metric_names_lowercase:
    metric_statements:
      - set(metric.name, ToLowerCase(metric.name))

OTTL has several functions that can be used to manipulate/transform data. It also accepts conditions in case you need to apply it only to specific metrics.

[GGonzalezGomez]

Thank you @edmocosta, that was exactly what I was looking for. I had it just in front of me and didn't see it :)