Profile applicability: Level 1
Encrypt etcd key-value store.
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 at rest to avoid any disclosures.
 |
NoteBy default,
--encryption-provider-config is not set. |
Audit
Run the following command on the Control Plane node:
ps -ef | grep kube-apiserver
Verify that the
--encryption-provider-config argument is set to a EncryptionConfig file. Additionally, ensure that the EncryptionConfig file has all the desired resources covered especially any secrets.Remediation
Follow the Kubernetes documentation and configure a EncryptionConfig file. Then, edit
the API server pod specification file
/etc/kubernetes/manifests/kube-apiserver.yaml on the master node and set the --encryption-provider-config parameter to the path of that file: --encryption-provider-config=</path/to/EncryptionConfig/File>