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 eagl...@gmail.com 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 prometheus-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/ebec1e70-d9d3-415d-970d-44bed596e9a9n%40googlegroups.com.
