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
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