Rel Notes 4.21 Storage

modules/rn-ocp-release-notes-deprecated-removed-tables.adoc

@@ -215,7 +215,7 @@
 |Shared Resources CSI Driver Operator
 |Removed
 |Removed
-|
+|Removed
 |====
 
 

modules/rn-ocp-release-notes-new-features.adoc

@@ -306,13 +306,77 @@ For more information, see xref:../scalability_and_performance/cnf-provisioning-l
 [id="ocp-release-notes-storage_{context}"]
 == Storage
 
-////
-Instructions: Add entries in the following format:
+Volume Attributes Classes is generally available::
++
+Volume Attributes Classes provide a way for administrators to describe "classes" of storage they offer. Different classes might correspond to different quality-of-service levels. Volume Attributes Classes was introduced in {product-title} 4.19, and is now generally available in 4.21.
++
+Volume Attributes Classes is available only with AWS Elastic Block Storage (EBS) and Google Cloud Platform (GCP) persistent disk (PD) Container Storage Interface (CSI).
++
+You can apply a Volume Attributes Classes to a persistent volume claim (PVC). If a new Volume Attributes Class becomes available in the cluster, you can update the PVC with the new Volume Attributes Classes if needed.
++
+Volume Attributes Classes have parameters that describe volumes belonging to them. If a parameter is omitted, the default is used at volume provisioning. If a user applies the PVC with a different Volume Attributes Class with omitted parameters, the default value of the parameters might be used depending on the CSI driver implementation. For more information, see the related CSI driver documentation.
++
+For more information, see xref:../storage/understanding-persistent-storage.adoc#storage-persistent-storage-pvc-volumeattributesclass_understanding-persistent-storage[Volume Attributes Classes]. 
 
-Item description::
+Azure File CSI supporting snapshots feature is generally available::
 +
-Detailed information.
-////
+A snapshot represents the state of the storage volume in a cluster at a particular point in time. Volume snapshots can be used to provision a new volume.
++
+{product-title} 4.17 introduced volume snapshot support for the Microsoft Azure File Container Storage Interface (CSI) Driver Operator as a Technology Preview feature. In 4.21, this feature is generally available. Also, Azure File snapshots now supports Network File System (NFS) in addition to Server Message Block (SMB).
++
+For more information, see xref:../storage/container_storage_interface/persistent-storage-csi.adoc#csi-drivers-supported_persistent-storage-csi[CSI drivers supported by OpenShift Container Platform] and xref:../storage/container_storage_interface/persistent-storage-csi-snapshots.adoc[CSI volume snapshots].
+
+Azure File CSI supporting volume cloning feature is generally available::
++
+Volume cloning duplicates an existing persistent volume (PV) to help protect against data loss in {product-title}. You can also use a volume clone just as you would use any standard volume.
++
+{product-title} 4.16 introduced volume cloning for the Microsoft Azure File Container Storage Interface (CSI) Driver Operator as a Technology Preview feature. In 4.21, this feature is generally available. Also, Azure File cloning now supports Network File System (NFS) in addition to Server Message Block (SMB).
++
+For more information, see xref:../storage/container_storage_interface/persistent-storage-csi-azure-file.adoc[Azure File CSI Driver Operator] and xref:../storage/container_storage_interface/persistent-storage-csi-cloning.adoc[CSI volume cloning].
+
+oVirt CSI Driver Operator is removed from {product-title} 4.21::
++
+Red Hat Virtualization (RHV) as a host platform for {product-title} was deprecated in version 4.14 and is no longer supported. In {product-title} 4.21, the oVirt CSI Driver Operator is removed.
+
+CIFS/SMB CSI Driver Operator supports IBM Power::
++
+In {product-title} 4.21, the CIFS/SMB CSI Driver Operator supports IBM Power (ppc64le).
++
+For more information, see xref:../storage/container_storage_interface/persistent-storage-csi-smb-cifs.adoc[CIFS/SMB CSI Driver Operator].
+
+Introduction of new field to track the status of volume resize attempts::
++
+{product-title} 4.19 introduced resizing recovery that stops the expansion controller from indefinitely attempting to expand a volume to an unsupported size request. This feature allows you to recover and provide another smaller resize value for the persistent volume claim (PVC). The new value must be larger than the original volume size.
++
+{product-title} 4.21 introduces the `pvc.Status.AllocatedResourceStatus` field, which shows the status of volume resize attempts. If a user changes the size of their PVCs, this new field allows resource quota to be tracked accurately.
++
+For more information about resizing volumes, see xref:../storage/expanding-persistent-volumes.adoc[Expanding persistent volumes].
++
+For more information about recovering when resizing volumes, see xref:../storage/expanding-persistent-volumes.adoc#expanding-recovering-from-failure_expanding-persistent-volumes[Recovering from failure when expanding volumes].
+
+Mutable CSI node allocatable property (Technical Preview)::
++
+This feature allows for dynamically updating the maximum number of storage volumes a node can handle. Without this feature, volume limits are essentially immutable when a node first joins the cluster. If the environment changes—for example, if you attach a new network interface (ENI) that shares a hardware "slot" with your storage—{product-title} does not recognize it has fewer slots available for disks, leading to pods becoming stuck.
++
+This feature is only supported on AWS Elastic Block Storage (EBS).
++
+Mutable CSI node allocatable property is supported in {product-title} 4.21 as a Technical Preview feature. To enable this feature, you need to enable Feature Gates.
++
+For more information about enabling Technical Preview features, see xref:../nodes/clusters/nodes-cluster-enabling-features.adoc[Feature Gates].
+
+Reducing permissions while using the GCP PD CSI Driver Operator is generally available::
++
+The default installation allows the Google Cloud Platform (GCP) persistent disk (PD) Container Storage Interface (CSI) Driver to impersonate any service account in the Google Cloud project. You can reduce the scope of permissions granted to the GCP PD CSI Driver service account in your Google Cloud project to only the required node service accounts.
++
+For more information about this feature, see xref:../storage/container_storage_interface/persistent-storage-csi-gcp-pd.adoc#persistent-storage-csi-gcp-pd-reduce-permissions_persistent-storage-csi-gcp-pd[Reducing permissions while using the GCP PD CSI Driver Operator].
+
+Volume group snapshots API updated (Technical Preview)::
++
+The API for the Container Storage Interface (CSI) volume group snapshot feature is updated from `v1beta1` to `v1beta2`.
++
+This feature is supported at the Technical Preview level.
++
+For more information, see xref:../storage/container_storage_interface/persistent-storage-csi-group-snapshots.adoc[CSI volume group snapshots].
 
 [id="ocp-release-notes-support-sigstore_{context}"]
 == Support for sigstore bring your own PKI (BYOPKI) image validation

modules/rn-ocp-release-notes-technology-preview.adoc

@@ -635,97 +635,102 @@ In the following tables, features are marked with the following statuses:
 |AWS EFS One Zone volume
 |Not Available
 |General Availability
-|
+|General Availability
 
 |Automatic device discovery and provisioning with Local Storage Operator
 |Technology Preview
 |Technology Preview
-|
+|Technology Preview
+
+|Azure File CSI cloning support
+|Technology Preview
+|Technology Preview
+|General Availability
 
 |Azure File CSI snapshot support
 |Technology Preview
 |Technology Preview
-|
+|General Availability
 
 |Azure File cross-subscription support
 |General Availability
 |General Availability
-|
+|General Availability
 
 |Azure Disk performance plus
 |Not Available
 |General Availability
-|
+|General Availability
 
 |Configuring fsGroupChangePolicy per namespace
 |Not Available
 |General Availability
-|
+|General Availability
 
 |Shared Resources CSI Driver in OpenShift Builds
 |Technology Preview
 |Technology Preview
-|
+|Technology Preview
 
 |{secrets-store-operator}
 |General Availability
 |General Availability
-|
+|General Availability
 
 |CIFS/SMB CSI Driver Operator
 |General Availability
 |General Availability
-|
+|General Availability
 
 |VMware vSphere multiple vCenter support
 |General Availability
 |General Availability
-|
+|General Availability
 
 |Disabling/enabling storage on vSphere
 |General Availability
 |General Availability
-|
+|General Availability
 
 |Increasing max number of volumes per node for vSphere
 |Technology Preview
 |Technology Preview
-|
+|Technology Preview
 
 |RWX/RWO SELinux mount option
 |Developer Preview
 |Technology Preview
-|
+|Technology Preview
 
 |Migrating CNS Volumes Between Datastores
 |General Availability
 |General Availability
-|
+|General Availability
 
 |CSI volume group snapshots
 |Technology Preview
 |Technology Preview
-|
+|Technology Preview
 
 |GCP PD supports C3/N4 instance types and hyperdisk-balanced disks
 |General Availability
 |General Availability
-|
+|General Availability
 
 |OpenStack Manila support for CSI resize
 |General Availability
 |General Availability
-|
+|General Availability
 
 |Volume Attribute Classes
 |Technology Preview
 |Technology Preview
-|
+|General Availability
 
 |Volume populators
 |Technology Preview
 |General Availability
-|
+|General Availability
 |====