EnsureCluster either returns an existing cluster instance or starts up a new one.

EnsureSingleInstance either returns an existing server instance or starts up a new one.

StopCluster stops the cluster.

StopSingleInstance stops the server.

Follower role.

Leader role.

ReadReplica role.

Cluster holds information about the cluster.

ClusterMember holds information about a single server in the cluster.

SingleInstance holds information about the single instance server.

ClusterMemberRole is the type of the server that's part of the causal cluster.