Unfortunately, it's not bounded. I think what we'll likely do is update the application to add another label with the correctly-formatted values before publishing. Seems a bit silly, but doesn't seem like there's much an alternative.
On Tuesday, August 23, 2022 at 5:17:06 AM UTC-4 Brian Candler wrote: > 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/8d6dc206-c823-40a4-a171-6ff7f0dad0dcn%40googlegroups.com.
