cinder

October 6, 2026
in openstack, cinder, storage, netapp
11 min read

Demystifying NetApp Adaptive QoS in OpenStack Genestack

Configuring multi-tenant Quality of Service (QoS) for enterprise storage in OpenStack sounds straightforward on paper: define standard and high-performance tiers, specify IOPS per gigabyte, and let the storage backend handle enforcement. In practice, our journey implementing NetApp ONTAP Adaptive QoS (AQoS) across Rackspace OpenStack Flex and Genestack production environments revealed sharp discrepancies between early published deployment specifications and storage reality.

June 9, 2026
in openstack, compute, cinder, recovery
8 min read

Rescuing a Linux based Boot-From-Volume Instance in OpenStack

When an OpenStack instance backed by a persistent Cinder volume (Boot-From-Volume, or BFV) gets corrupted, misconfigured, or suffers a broken bootloader, recovery can be challenging. However, OpenStack control planes (introduced in Ussuri) support Stable Device Instance Rescue for volume-backed instances.

This guide provides a comprehensive guide to help analyze the storage layout and some basic commands to reapir a filesystem using nativ Linux tools.

April 8, 2026
in openstack, cinder, storage
4 min read

Fixing Cinder LVM Volume Deletion Failures Caused by Active iSCSI Sessions

In OpenStack environments using the Cinder LVM backend with tgt, a volume deletion can fail even after the instance side of the workflow appears complete. One common cause is that the iSCSI session on the block storage node is still active, preventing tgt from removing the target.