[kube-prometheus-stack] enableOTLPReceiver is not passed through to the CRD

[KarstenB]

Is your feature request related to a problem ?

There is now a enableOTLPReceiver field in the Prometheus CRD, but the kube-prometheus-stack doesn't pass that through unfortunately.

Describe the solution you'd like.

Pass

prometheus:
  prometheusSpec:
    enableOTLPReceiver: true

down to the Prometheus CRD

Describe alternatives you've considered.

This works, but I don't see why a supported flag in the CRD should not be passed through.

prometheus:
  prometheusSpec:
    additionalArgs:
     # This is a workaround for the enableOTLPReceiver: true line which would actually be supported in the prometheus spec
      - name: "web.enable-otlp-receiver"

Additional context.

No response

[Mason0920]

I need this feature too.

[dprotaso]

I notice this error now

  - lastTransitionTime: "2025-06-19T02:18:08Z"
      message: 'making statefulset failed: make StatefulSet spec: can''t set arguments
        which are already managed by the operator: web.enable-otlp-receiver'

[jkroepke]

please create a PR that do this.