Chapter 5. Developer previews This section describes the developer preview features introduced in Red Hat OpenShift Data Foundation 4.15. Important Developer preview feature is subject to Developer preview support limitations. Developer preview releases are not intended to be run in production environments. The clusters deployed with the developer preview features are considered to be development clusters and are not supported through the Red Hat Customer Portal case management system. If you need assistance with developer preview features, reach out to the ocs-devpreview@redhat.com mailing list and a member of the Red Hat Development Team will assist you as quickly as possible based on availability and work schedules. 5.1. Multicloud Object Gateway support STS for clients Multicloud Object Gateway (MCG) provides support to a security token service (STS) similar to the one provided by Amazon Web Services. To allow other users to assume the role of a certain user, it is necessary to assign a role configuration to the user using MCG command line interface. For more information, see the knowledgebase article, Use the Multi-Cloud Object Gateway's Security Token Service to assume the role of another user . 5.2. Support RADOS namespace for external mode The RADOS block device (RBD) storage class created in the OpenShift Data Foundation cluster uses a namespace for provisioning storage instead of the complete pool. The newly created namespace has restricted permissions. For more information, see the knowledgebase article, Adding RADOS namespace for external mode cluster . 5.3. OpenShift Data Foundation deployed across three vSphere clusters with vSphere IPI OpenShift Data Foundation supports OpenShift deployment stretched across vSphere installer provisioned infrastructure clusters managed by one vCenter. This support enables you to deploy OpenShift Container Platform and OpenShift Data Foundation across Availability Zones (AZ) with each replica having affinity to an AZ. This helps to survive failure of any single zone as a minimum of three zones are required for the deployment. For more information, see Installing a cluster on vSphere with customizations . 5.4. User capabilities for CephObjectStoreUser With this release, user capabilities (caps) for RADOS gateway (RGW) by using CephObjectStore CRD is supported. Enabling these caps such as user, bucket, and so on gives administrator like capabilities through REST API similar to radosgw-admin commands. For more information, see the knowledgeabase article, User capabilities in CephObjectStoreUser . 5.5. Ceph-CSI built-in capability to find and clean stale subvolumes OpenShift Data Foundation 4.15 introduces an inbuilt script to delete stale volumes on a OpenShift Data Foundation cluster that have RADOS block device (RBD) images or CephFS subvolumes without the parent PVC. For more information, see the knowledgebase article, Listing and cleaning stale subvolumes . 5.6. Complete bucket policy elements in Multicloud Object Gateway With this release, bucket policies can be updated to allow lists in Multicloud Object Gateway. For example, policy definition created for a bucket can be such that read access is granted to all the directories whereas only one specific directory has the write access. For more information, see the knowledgebase article, Support for additional elements to the S3 BucketPolicy in Multicloud Object Gateway . 5.7. Recovery to replacement Cluster with Regional DR When there is a failure with the primary cluster, options are either to repair or wait for the recovery of the existing cluster or replace the cluster entirely if the cluster is irredeemable. The failed primary cluster can be replaced with a new cluster and fallback (relocate) can be enabled to this new cluster. For more information, contact Red Hat Customer Support . 5.8. Support IPv6 for external mode With this release, IPv6 is supported in Openshift Data foundation external mode deployments.

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