Admission webhook prevents using remoteWrite.messageVersion in Prometheus (through config map)

[pbriet]

Hello,

When upgrading to Openshift 4.18, I was expecting to the new remoteWrite.messageVersion in the Prometheus configuration, which is described in the documents.

The Prometheus CRD does have this new attribute. But the admission webhook "monitoringconfigmaps.openshift.io" prevents me to set it in the monitoring config map.

admission webhook "monitoringconfigmaps.openshift.io" denied the request: the user workload monitoring configuration in "config.yaml" could not be parsed: error unmarshaling JSON: while decoding JSON: json: unknown field "messageVersion"

This is kinda frustrating ;)

kind: ConfigMap
apiVersion: v1
metadata:
  name: user-workload-monitoring-config
  namespace: openshift-user-workload-monitoring
data:
  config.yaml: |
    prometheus:
       (...)
      remoteWrite:
      - url: http://some-url:some-port/api/v1/write
        messageVersion: V2.0

Thanks,