The IBM Power® Virtual Server Block CSI Driver is installed through the IBM Power® Virtual Server Block CSI Driver Operator and the operator is based on library-go
. The OpenShift Container Platform library-go
framework is a collection of functions that allows users to build OpenShift operators easily. Most of the functionality of a CSI Driver Operator is already available there. The IBM Power® Virtual Server Block CSI Driver Operator is installed by the Cluster Storage Operator. The Cluster Storage Operator installs the IBM Power® Virtual Server Block CSI Driver Operator if the platform type is Power Virtual Servers.
OpenShift Container Platform can provision persistent volumes (PVs) by using the Container Storage Interface (CSI) driver for IBM Power® Virtual Server Block Storage.
Familiarity with persistent storage and configuring CSI volumes is helpful when working with a CSI Operator and driver.
To create CSI-provisioned PVs that mount to IBM Power® Virtual Server Block storage assets, OpenShift Container Platform installs the IBM Power® Virtual Server Block CSI Driver Operator and the IBM Power® Virtual Server Block CSI driver by default in the openshift-cluster-csi-drivers
namespace.
The IBM Power® Virtual Server Block CSI Driver Operator provides two storage classes named ibm-powervs-tier1
(default), and ibm-powervs-tier3
for different tiers that you can use to create persistent volume claims (PVCs). The IBM Power® Virtual Server Block CSI Driver Operator supports dynamic volume provisioning by allowing storage volumes to be created on demand, eliminating the need for cluster administrators to pre-provision storage.
The IBM Power® Virtual Server Block CSI driver allows you to create and mount IBM Power® Virtual Server Block PVs.
Storage vendors have traditionally provided storage drivers as part of Kubernetes. With the implementation of the Container Storage Interface (CSI), third-party providers can instead deliver storage plugins using a standard interface without ever having to change the core Kubernetes code.
CSI Operators give OpenShift Container Platform users storage options, such as volume snapshots, that are not possible with in-tree volume plugins.