Turn on Role Based Access Control. Rationale: Role Based Access Control (RBAC) allows fine-grained control over the operations that different entities can perform on different objects in the cluster. It is recommended to use the RBAC authorization mode. Impact: When RBAC is enabled you will need to ensure that appropriate RBAC settings (including Roles, RoleBindings and ClusterRoleBindings) are configured to allow appropriate access.
Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml on the Control Plane node and set the --authorization-mode parameter to a value that includes RBAC, for example: --authorization-mode=Node,RBAC Default Value: By default, RBAC authorization is not enabled.