Longhorn v1.11.3 focuses on hardening the storage control plane and improving data movement reliability. Key improvements include fixes for iSCSI-related volume stalls, stability during replica rebuilds, and more robust volume migration workflows. Note that this release requires Kubernetes v1.34+ due to updated CSI components.

Kubernetes v1.34 requirement for CSI compatibility — This is a critical requirement. Before updating to this version, you must ensure your Kubernetes cluster is at v1.34 or higher, or storage provisioning will fail due to the new CSI external provisioner compatibility.

Resiliency for V1 volumes after iSCSI restarts — Prevents administrative tasks like PVC resizing from hanging or failing if the host iSCSI service restarts, ensuring volume operations remain reliable during host maintenance.

Elimination of panics during replica rebuilds — Eliminates a crash scenario in the instance manager, making the system significantly more stable when rebuilding replicas after a disk or node failure.

Fix for interrupted volume migrations during node transitions — Ensures that volume migrations between nodes are not prematurely interrupted, preventing potential data availability issues during cluster rebalancing or node maintenance.

Resolution for recurring trim job deadlocks — Avoids background maintenance failures that could lead to inefficient disk space usage or stalled storage cleanup tasks.