Admin: Deployment scenarios
Single stack (single node)
A single stack implementation is an initial node (installed on a single physical or virtual machine). By default, the initial node always supports the Node Manager role
Cluster (multiple nodes)
A cluster implementation contains an initial node plus a series of additional nodes. Each cluster node, including the initial node, exposes the Node Manager role.
At any given time, one of the nodes is acting as the “Master Node” and each node can contain one or more roles. However, all roles must be exposed at least once in the cluster. Refer to Roles for more information.