Feasibility of converting a cloud using local Nova storage to a Ceph RBD backend

Solution Unverified - Updated -

Issue

  • After initially deploying an overcloud environment with NovaEnableRbdBackend set to False, can it be changed to True to enable Ceph storage for Nova ephemeral root disks?
  • How does changing NovaEnableRbdBackend parameter affect the function of the overcloud?
  • Is it possible to change NovaEnableRbdBackend and switch the overcloud's Nova ephemeral storage option to and from Ceph?

Environment

  • Red Hat OpenStack Platform 8.0

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