It's not clear what your requirements are. Is it possible that values after the double-dash might themselves contain a single dash, like mykub-test--another-test--test-123 and if so, what should happen?
Could there be additional double-dash separated sections like mykub-test--anothertest--test123--test456 and if so, what should happen? If you want mykub-test--a-a--b-b--c-c to become mykub-test--a-a, then you could try this (untested): - source_labels: [__meta_kubernetes_namespace] regex: (mykub-test--.*?)(--.*)? target_label: kubernetes_customer_env_name replacement: $1 action: replace .*? applies the "non-greedy" modifier to make the first .* match the smallest possible number of times, whereas (xxx)? means match the subexpression zero or one times. For more info see https://github.com/google/re2/wiki/Syntax If you need to do more complex multi-step processing then you can use temporary labels. Names starting __tmp_ are reserved for this purpose (i.e. are guaranteed not to clash with other prometheus-internal labels). The following will split the label into two, on the *first* instance of "--" which appears in the string, requiring at least one instance to occur: - source_labels: [__meta_kubernetes_namespace] regex: (.*?)--(.*) target_label: __tmp_nsprefix replacement: $1 action: replace - source_labels: [__meta_kubernetes_namespace] regex: (.*?)--(.*) target_label: __tmp_nssuffix replacement: $2 action: replace On Tuesday, 14 June 2022 at 18:38:55 UTC+2 [email protected] wrote: > Wonder if I can get some help. We are seeing an oddity here. Within my > configuration, we are using kubernetes_sd_configs and I have the following > in the relabel section of my scrape config: > > - source_labels: [__meta_kubernetes_namespace] > separator: ; > regex: (^mykub-test--[^-]*) > target_label: kubernetes_customer_env_name > replacement: $1 > action: replace > > This works fine if the namespace is just mykub-test--herenow but not for > namespaces like mykub-test--anothertest2--test123 . Basically, I want to > strip off the "--test123" (or ignore it) in the later example. Any > suggestions? > -- 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/ebec1e70-d9d3-415d-970d-44bed596e9a9n%40googlegroups.com.
