All nodes that have discovered each other (see the section called “Location discovery”) are automatically part of a high availability cluster. No specific operator command is required to add a node to the cluster.
To host partitions on a node they must be defined and enabled on the node by the administrator, or using an API. Defining a partition is discussed in the section called “Defining partitions”. Enabling partitions is discussed in the section called “Enabling and disabling partitions”.