Portworx CSI Release Notes

Portworx CSI (PX-CSI) is a lightweight storage orchestration solution that uses the Kubernetes Container Storage Interface (CSI) framework to integrate the Pure Storage storage solutions.

PX-CSI integrates with Kubernetes to directly access Pure Storage FlashArray Direct Access volumes (FADA) and FlashBlade Direct Access volumes (FBDA).

If you're setting up PX-CSI for the first time, see Install Portworx CSI. If you're already using PX-CSI, upgrade to the latest version. For upgrade instructions, see Upgrade Portworx CSI.

For information about supported versions, release numbering, and support phases, refer to the PX-CSI Life Cycle Support Policy.

PX-CSI 26.1.0

February 26, 2026

What's New

• FlashArray ActiveCluster support for high availability
  

  PX-CSI now supports FlashArray ActiveCluster for synchronous replication between two FlashArrays, enabling high availability and disaster recovery. Configure ActiveCluster by setting the pure_fa_pod_name parameter in the StorageClass to the stretched pod name. PX-CSI establishes multipath connections to both arrays, enabling automatic failover if one becomes unavailable. For more information, see Use FlashArray ActiveCluster for high availability.

• FlashBlade//EXA support
  PX-CSI now supports FlashBlade//EXA, Pure Storage's high-performance solution for AI and HPC workloads. FlashBlade//EXA uses node group–based provisioning instead of traditional size-based placement. To provision volumes on FlashBlade//EXA, specify the pure_fb_node_group parameter in your StorageClass. For more information, see Create and use FlashBlade PVCs.

• Subnet-aware iSCSI login for multi-subnet environments
  PX-CSI now supports subnet-aware iSCSI login, so that iSCSI initiator interfaces on Kubernetes nodes connect only to FlashArray target interfaces within the same subnet. This is useful when clusters span multiple network subnets and network policies restrict cross-subnet communication. To enable this feature, set the ENABLE_SUBNET_AWARE_ISCSI_LOGIN environment variable to true in your StorageCluster specification. For more information, see Configure subnet-aware iSCSI login.

• Static provisioning for importing existing volumes
  PX-CSI supports static provisioning, so you can import existing FlashArray and FlashBlade volumes into Kubernetes without provisioning new ones. This helps migrate existing data into Kubernetes and use volumes created outside of it. For more information, see Static Provisioning of Volumes.

• New FlashBlade StorageClass parameters
  PX-CSI now supports new StorageClass parameters for FlashBlade file systems, providing better control over file system configuration:

  • pure_fb_node_group: Specifies the node group name for FlashBlade//EXA deployments.
  • pure_fb_hard_limit_enabled: Enables or disables hard quota limits on the file system (default: true).
  • pure_fb_snapshot_directory_enabled: Enables or disables the snapshot directory (default: false).
  • pure_fb_nfsv3_enabled: Enables or disables the NFSv3 protocol (default: false).
  • pure_fb_nfsv4_1_enabled: Enables or disables the NFSv4.1 protocol (default: true).

  For more information, see StorageClass reference.

• Nvidia GPU Direct Storage support for FlashBlade
  PX-CSI now supports Nvidia GPU Direct Storage (GDS) with FlashBlade by mounting NFSv3 file share with RDMA. This support enables high performance, low latency storage access for GPU workloads, AI/ML training, and HPC applications. To use GDS, specify proto=rdma in the StorageClass mount options.

Resolved Issues

Issue Number	Issue Description	Severity
PWX-50861	Telemetry registration with Pure1 failed because a required header was missing when a proxy was configured using the PX_HTTP_PROXY or PX_HTTPS_PROXY environment variable.	Minor
PWX-50855	During NodeUnstageVolume, multipath device flush failures could result in incomplete device cleanup, leaving stale multipath devices on the node.	Minor
PWX-50391	When using the NVMe protocol, pods might get stuck in the ContainerCreating state with the multipath device not found error after restarting on the same node.	Minor
PWX-51355	Telemetry pods crashed when call-home requests failed with some network errors, such as ERR_TOO_MANY_REDIRECTS, instead of connection refused errors.	Minor
PWX-49846	Volumes failed to unmount after upgrading to PX-CSI 25.8.0 when using containerd as the container runtime.	Minor
PWX-49579	When many PVCs were created simultaneously, they could get stuck in the pending state due to FlashArray API rate limiting. The CSI provisioner sent excessive parallel requests to the backend array, causing provisioning failures. The provisioner now includes throttling to prevent API rate limit errors.	Minor
PWX-48903	Kubelet volume metrics (kubelet_volume_stats_*) were not available for PX-CSI volumes, preventing monitoring of volume capacity and usage through standard Kubernetes metrics endpoints. This affected integration with Kubernetes monitoring tools and dashboards. For more information about available metrics, see Monitor PX-CSI.	Minor
PWX-48887	Telemetry pods failed to collect controller logs when PX-CSI was installed in a custom namespace.	Minor
PWX-48518	Node-level environment variable overrides specified in the StorageCluster specification were not applied, preventing per-node customization for features like concurrency settings and timeouts. For more information about node-specific configuration, see StorageCluster CRD reference.	Minor

Known Issues

• PWX-51697: When you add custom annotations to the StorageClasses that the Portworx Operator creates, it removes them during reconciliation loops. Integrations that rely on these annotations (for example, external tool addding annotations or GitOps system managed StorageClass annotations) might not detect the intended StorageClasses.
  Note: This issue does not affect KubeVirt StorageClasses deployed by the Operator

  Workaround: Create custom StorageClasses with the required annotations instead of modifying StorageClasses created by the Portworx Operator.

  Affected version: Portworx Operator 25.6.0