[kube-prometheus-stack] Feature to update the default prometheusrules, like CPUThrottlingHigh value

[sambitr]

Is your feature request related to a problem ?

Hi There, we are using Kube-prometheus-stack Helm chart to create prometheus rules and all. During this process, CRD: prometheusrules.monitoring.coreos.com creates prometheusrules. We deploy these changes through GitOps(Flux)

The prometheusrules can be changed manually only. What we want to do is to do it from GitOps repository. But The only way to do is to put the whole prometheusrules file and there change the specific section of alert that needs to be changed. If we keep only one, which needs to be updated, once it gets applied, it removes rest of the default rules. This is not ideal.

I would like to have a feature that would patch the specific rules from prometheusrules and update only that rule only.

Describe the solution you'd like.

Provide editable prometheus rules to update those sections, when needed. Something in line with : additionalPrometheusRulesMap, where we will be able to update the default rules

Describe alternatives you've considered.

I have put the whole prometheusrules file and there change the specific section of alert that needs to be changed. If we keep only one, which needs to be updated, once it gets applied, it removes rest of the default rules.

Additional context.

No response

[LeoQuote]

It can be done by disable the specific alert rule and redefine it in

helm-charts/charts/kube-prometheus-stack/values.yaml

Line 194 in f29a258

additionalPrometheusRulesMap: {}

unfortunately those rules are generated by a script, if you want to provide such feature, you can try to edit the script and generate relating rules.