IBM Storage Scale container native cluster and node maintenance

The following section provides information on changing the IBM Storage Scale cluster configuration.

Limitations

While a configuration change is in progress, do not perform the following actions:

• Do not upgrade IBM Storage Scale container native.
• Do not attempt to add a node to the cluster.
• Do not upgrade Red Hat OpenShift.

Updating existing cluster configuration

The Cluster resource controls IBM Storage Scale cluster configuration.

To edit the configuration for an existing cluster:

oc edit cluster.scale

When a core pod configuration requires an update, the IBM Storage Scale operator cordons, drains, reboots (if necessary), and uncordons the node, which is performed one node at a time. When the drain is complete, the core pod is updated with the new configuration.

If the node was previously cordoned before the update, the operator does not uncordon the node.

Updating cluster configuration by upgrade

An upgrade of IBM Storage Scale container native is also considered an update of the cluster configuration, as the upgrade likely introduces changes to pod specification, for example update of container images.

For more information about how IBM Storage Scale Operator orchestrates an upgrade, see Upgrading.