Regional-DR

Regional disaster recovery (Regional-DR) is composed of Red Hat Advanced Cluster Management for Kubernetes (RHACM) and IBM Fusion Data Foundation components to provide application and data mobility across OpenShift Container Platform clusters. It is built on Asynchronous data replication and hence could have a potential data loss but provides the protection against a broad set of failures.

Fusion Data Foundation is backed by Ceph as the storage provider, whose lifecycle is managed by Rook and it is enhanced with the ability to:

  • Enable pools for mirroring.

  • Automatically mirror images across RBD pools.

  • Provides csi-addons to manage per Persistent Volume Claim mirroring.

Regional-DR supports Multi-Cluster configuration that is deployed across different regions and data centers. For example, a 2-way replication across two managed clusters located in two different regions or data centers. This solution is entitled with Red Hat Advanced Cluster Management (RHACM) and Fusion Data Foundation Advanced SKUs and related bundles.

Prerequisites

  • Disaster Recovery features supported by Fusion Data Foundation require that Fusion subscription be active on both source and destination clusters in order to successfully implement a Disaster Recovery solution.
  • Ensure that the primary managed cluster (Site-1) is co-situated with the active RHACM hub cluster while the passive hub cluster is situated along with the secondary managed cluster (Site-2). Alternatively, the active RHACM hub cluster can be placed in a neutral site (Site-3) that is not impacted by the failures of either of the primary managed cluster at Site-1 or the secondary cluster at Site-2. In this situation, if a passive hub cluster is used it can be placed with the secondary cluster at Site-2.
    Note: Hub recovery is a Technology Preview feature and is subject to Technology Preview support limitations.

For detailed solution requirements, see Requirements for enabling Regional-DR and Install > Installing > Requirements and recommendations within Red Hat Advanced Cluster Management for Kubernetes product documentation.