Ensure that the --bind-address argument is set to 127.0.0.1

Description:

Do not bind the scheduler service to non-loopback insecure addresses.

Rationale:

The Scheduler API service which runs on port 10251/TCP by default is used for health and metrics information and is available without authentication or encryption. As such it should only be bound to a localhost interface, to minimize the cluster's attack surface.

Edit the Scheduler pod specification file '/etc/kubernetes/manifests/kube-scheduler.yaml' on the master node and ensure the correct value for the '--bind-address' parameter.