Chapter 4. Technology previews

This section provides an overview of Technology Preview features introduced or updated in this release of Red Hat Ceph Storage.


Technology Preview features are not supported with Red Hat production service level agreements (SLAs), might not be functionally complete, and Red Hat does not recommend to use them for production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process.

For more information on Red Hat Technology Preview features support scope, see

4.1. Block Devices (RBD)

Mapping RBD images to NBD images

The rbd-nbd utility maps RADOS Block Device (RBD) images to Network Block Devices (NBD) and enables Ceph clients to access volumes and images in Kubernetes environments. To use rbd-nbd, install the rbd-nbd package. For details, see the rbd-nbd(7) manual page.

4.2. Object Gateway

Object Gateway archive site

With this release an archive site is supported as a Technology Preview. The archive site allows you to have a history of versions of S3 objects that can only be eliminated through the gateways associated with the archive zone. Including an archive zone in a multizone configuration allows you to have the flexibility of an S3 object history in only one zone while saving the space that the replicas of the versions S3 objects would consume in the rest of the zones.