Ensure that the --cert-file and --key-file arguments are set as appropriate

Description:

Configure TLS encryption for the etcd service.

Rationale:

etcd is a highly-available key value store used by Kubernetes deployments for persistent storage of all of its REST API objects. These objects are sensitive in nature and should be encrypted in transit.

Client connections only over TLS would be served.

Follow the etcd service documentation and configure TLS encryption.

Then, edit the etcd pod specification file '/etc/kubernetes/manifests/etcd.yaml' on the master node and set the below parameters.

--cert-file=</path/to/ca-file>
--key-file=</path/to/key-file>
.