Chapter 5. Developer previews

Adds initial support for Two Nodes Fencing (TNF), enabling deployment of highly available two‑node OpenShift clusters. This enhancement removes a key adoption barrier by providing a storage path that aligns with OpenShift’s upcoming two‑node capabilities, helping customers benefit from an integrated Red Hat compute‑and‑storage solution.

For more information, see Deploying OpenShift Data Foundation on a Two‑Node OpenShift Cluster with Fencing and DRBD.

This update introduces automatic storage‑level fencing for nodes marked with the Kubernetes out‑of‑service taint during non‑graceful shutdowns. When such a taint is applied, OpenShift Data Foundation ensures volumes attached through Ceph‑CSI are safely fenced from the unreachable node, allowing pods to be rescheduled on healthy nodes without risk of data corruption. This improves high availability and significantly reduces recovery time during unexpected node or zone outages.

For more information, see Configuring Non-Graceful Node Shutdown Handling in OpenShift Data Foundation.