Cozystack 1.3: Storage-Aware Scheduling, LINSTOR GUI, and VM Default Images

Thu, 23 Apr 2026 00:00:00 +0000

Cozystack 1.3: Storage-Aware Scheduling, LINSTOR GUI, and VM Default Images

Cozystack v1.3.0 is now available. The release also rolls up every fix shipped in the v1.2.1 → v1.2.4 patch line.

This cycle pushes the platform forward in five clear directions: smarter storage placement, a managed UI for LINSTOR, a built-in catalog of VM base images, deeper application-level observability, and a complete cross-namespace VM backup-restore experience.

Main highlights

Storage-aware scheduling via the LINSTOR extender

The cozystack-scheduler now consults a LINSTOR scheduler extender when placing pods that declare both a SchedulingClass and LINSTOR-backed PVCs. Pods are preferentially scheduled to nodes where their volume replicas already live, cutting cross-node replication traffic and lowering I/O latency for storage-heavy workloads — databases, object stores, VMs.

Virtualization on Cozystack

Cozystack 1.3: Storage-Aware Scheduling, LINSTOR GUI, and VM Default Images