SMI Bare Metal Stacked Cluster

In SMI Bare Metal deployment, a stacked cluster is defined as a cluster containing three Bare Metal control plane nodes with a primary control plane, OAM, and other applications hosted on the same three nodes. A healthy stacked cluster needs at least two working control plane nodes to perform all the functions. When the two control plane nodes fail, the entire cluster fails and you must redeploy the entire cluster. You can run the K8s cluster synchronization from the current Active node of the Cluster Manager HA.

The subsequent sections provide information about handling the stacked cluster in the event of a Bare Metal node failure (unplanned) or planned maintenance.