Is the number of characters to replace bounded, e.g. a maximum of 4? Then you can just use label_replace 4 times (or repeat the whole rewriting rule 4 times).
Otherwise, I think getting the labels right at the exporter is the right answer. On Tuesday, 23 August 2022 at 08:45:36 UTC+1 [email protected] wrote: > Hi, > > I have a prometheus metric that contains a label with a value that > contains a character I’d like to replace with another. Specifically, the > label can look like this (omitting irrelevant labels): > *some_metric{destination_job=”us-east-1/foo-bar/prod/some_job}” * > > or like this: > *some_metric{destination_job=”us-east-1/foo-bar-baz/prod/some_job}”} * > > Note the variable number of hyphens in the second segment (*foo-bar* vs > *foo-bar-baz*). > > I’d like to replace this character with an underscore, so that: > > *some_metric{destination_job="us-east-1/foo-bar/prod/some_job"}* > > becomes: > > *some_metric{destination_job="us-east-1/foo_bar/prod/some_job}"* > > and > > *some_metric{destination_job=”us-east-1/foo-bar-baz/prod/some_job}”}* > > becomes: > > *some_metric{destination_job=”us-east-1/foo_bar_baz/prod/some_job}”}* > > I attempted to use *label_replace*, but the problem is that we’re using a > variable number of hyphens, so I couldn’t use something like *(.+)-(.+)* to > capture the segment and then use *$1_$2* (or whatever numbers the capture > groups end up being), since some cases I’d need to do $*1_$2_$3*, etc. > > Is there a way to do this? I’m attempting to do this at query time, but > also happy to use *metric_relabel_configs* - but that appears to suffer > from the same limitation. > > I might be missing something simple, in which case I apologize in advance. > As a last resort, we can update our application code to publish a separate > (or modified label) value, but I’d prefer to avoid that if possible. > > Thanks! > > - Yuriy > > -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/8bc6cfd4-8590-493b-80ff-b214c493b6a5n%40googlegroups.com.
