AggregationRule describes how to locate ClusterRoles to aggregate into the ClusterRole

ClusterRole is a cluster level, logical grouping of PolicyRules that can be referenced as a unit by a RoleBinding or ClusterRoleBinding.

ClusterRoleBinding references a ClusterRole, but not contain it. It can reference a ClusterRole in the global namespace, and adds who information via Subject.

ClusterRoleBindingList is a collection of ClusterRoleBindings

ClusterRoleList is a collection of ClusterRoles

PolicyRule holds information that describes a policy rule, but does not contain information about who the rule applies to or which namespace the rule applies to.

Role is a namespaced, logical grouping of PolicyRules that can be referenced as a unit by a RoleBinding.

RoleBinding references a role, but does not contain it. It can reference a Role in the same namespace or a ClusterRole in the global namespace. It adds who information via Subjects and namespace information by which namespace it exists in. RoleBindings in a given namespace only have effect in that namespace.

RoleBindingList is a collection of RoleBindings

RoleList is a collection of Roles

RoleRef contains information that points to the role being used

Subject contains a reference to the object or user identities a role binding applies to. This can either hold a direct API object reference, or a value for non-objects such as user and group names.