You can't put a metric "inside" __tmp_keep; rather, it's a label added to
the label set of the existing metric.
For example, it would change
mymetric{foo="bar"} 123.4
to
mymetric{foo="bar",__tmp_keep="true"} 123.4
Labels which start with double-underscore are silently removed at the end
of the relabelling phase, and labels starting with __tmp are guaranteed not
to clash with any labels used by prometheus internally.
On Friday, 16 June 2023 at 15:43:26 UTC Edoardo Beltramo wrote:
> Hi Brian,
>
> thanks for the answer,
>
> according to your script I should be able to save the metric I need inside
> *'**__tmp_keep**'* and then being able to use it anyhow I need right?
>
>
> On Wednesday, 14 June 2023 at 12:39:24 UTC+2 Brian Candler wrote:
>
>> Sorry, "target" probably should be "targetLabel" in your k8s setup (it's
>> "target_label" in regular prometheus)
>>
>> On Wednesday, 14 June 2023 at 11:24:45 UTC+1 Brian Candler wrote:
>>
>>> The solution should be the same as this recent thread:
>>> https://groups.google.com/g/prometheus-users/c/gy510HjV-Sw
>>>
>>> 1. Set a label like __tmp_keep to any string, for those metrics you want
>>> to keep
>>>
>>> *- sourceLabels: [__name__] ** regex: **kube_namespace_created**
>>> replacement: 'true'** target: __tmp_keep*
>>>
>>>
>>> 2. Then only drop those for which __tmp_keep is empty (unset)
>>>
>>> *- sourceLabels: [namespace,__tmp_keep] ** regex: 'z{3,6};'** action:
>>> drop*
>>>
>>> On Wednesday, 14 June 2023 at 11:00:40 UTC+1 Edoardo Beltramo wrote:
>>>
>>>> Hello,
>>>>
>>>> I’m facing an issue where I can’t properly save a metric;
>>>> Inside a k8s cluster I have a rule inside a *servicemonitor.yaml* file
>>>> that drops any metric coming from namespaces that match a specific regex,
>>>> something like:
>>>> * - sourceLabels: [namespace] ** regex: z{3,6} ** action: drop*
>>>>
>>>> this works, but now I have to implement a way to save a single metric,
>>>> specifically *kube_namespace_created* before dropping all the others,
>>>> only for those namespace that match the regex.
>>>>
>>>> Can someone give me an heads up? Thanks
>>>>
>>>
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