We want to customize the --event-ttl duration setting through KAS-O and OpenShift APIs. Currently the default in OpenShift is set to 3h via the defaultconfig.yaml in KAS-O.

There's no validation on Kubernetes side, setting it to 0 will not set a TTL via a lease in etcd - meaning the event will stay forever/until deleted manually.
We should settle on a meaningful minimum in this case, 5m / 10m / 15m?

Currently able to set via KubeAPIServer CRD as a config override:

  unsupportedConfigOverrides:
    apiServerArguments:
      event-ttl:
        - 1h

[UPSTREAM]
https://kubernetes.io/docs/reference/command-line-tools-reference/kube-apiserver/

[OpenShift]
https://github.com/openshift/cluster-kube-apiserver-operator/blob/main/bindata/assets/config/defaultconfig.yaml#L113-L114