What happens when multiple StorageClass are marked as default in OpenShift?

Solution Verified - Updated -

Issue

  • Following the Documentation of OCP3 and OCP4, it's possible to change the default StorageClass in OpenShift, even as is designed Kubernetes it's also possible to mark two different StorageClass as the default one, but what happens when two or more StorageClass are marked as default?
  • The alert MultipleDefaultStorageClasses is shown in OCP 4.

Environment

  • Red Hat OpenShift Container Platform (RHOCP)
    • 3
    • 4

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