The following storage configuration tasks are mandatory:
You must configure a default storage class for your cluster. Otherwise, the cluster cannot receive automated boot source updates.
You must configure storage profiles if your storage provider is not recognized by CDI. A storage profile provides recommended storage settings based on the associated storage class.
The following storage configuration tasks are optional:
By default, 5.5% of a file system PVC is reserved for overhead, reducing the space available for VM disks by that amount. You can configure a different overhead value.
You can configure local storage for virtual machines by using the hostpath provisioner (HPP). When you install the OpenShift Virtualization Operator, the HPP Operator is automatically installed.
You can configure RBAC roles to enable users to clone data volumes between namespaces.
You can perform the following Containerized Data Importer (CDI) configuration tasks:
You can configure CDI to import, upload, and clone VM disks into namespaces that are subject to CPU and memory resource restrictions.
CDI requires scratch space (temporary storage) to complete some operations, such as importing and uploading VM images. During this process, CDI provisions a scratch space PVC equal to the size of the PVC backing the destination data volume (DV).
You can perform the following data volume configuration tasks:
CDI can preallocate disk space to improve write performance when creating data volumes. You can enable preallocation for specific data volumes.
Data volume annotations allow you to manage pod behavior. You can add one or more annotations to a data volume, which then propagates to the created importer pods.
You can perform the following boot source update configuration task:
Boot sources can make virtual machine (VM) creation more accessible and efficient for users. If automatic boot source updates are enabled, CDI imports, polls, and updates the images so that they are ready to be cloned for new VMs. By default, CDI automatically updates Red Hat boot sources. You can enable automatic updates for custom boot sources.