As per RFE 2035334, this BZ is tracking the implementation of preallocated disks for the worker nodes only. It is a pre-requisite for implementing the control plane part of the RFE. This implementation exposes 3 options in the machine set configuration. (See https://docs.openshift.com/container-platform/4.8/machine_management/creating_machinesets/creating-machineset-rhv.html for details.) - clone: creates virtual machines that are cloned from the template instead of linking it to the original. (Default so far was: false) - sparse: creates a thin-provisioned disk. (Default so far was: true) - format: lets users switch disk formats. Can be "raw" or "cow". Raw disks don't support backups, but may be better for sparse provisioning on the underlying storage system. (Default so far was: "cow") The default machine set is created on installation and can be configured using the install-config. Suggestion for default values in this BZ is welcome. Note: the default values will only be applied to newly created install-configs and machine sets, old versions will not be changed. Changing the value on the machine set will not reprovision the worker nodes, but newly created worker nodes will pick up the changes.
Verified by automation.
OCP version: 4.11.0-0.nightly-2022-05-18-053037 Platform: RHV 4.5.0.6-0.7.el8ev
New Documentation PR https://github.com/openshift/openshift-docs/pull/47113
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Important: OpenShift Container Platform 4.11.0 bug fix and security update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2022:5069