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

Information

etcd should be configured to make use of TLS encryption for peer connections.

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 and also amongst peers in the etcd clusters.

Solution

Follow the etcd service documentation and configure peer TLS encryption as appropriate for your etcd cluster.

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

--peer-client-file=</path/to/peer-cert-file>
--peer-key-file=</path/to/peer-key-file>

Impact:

etcd cluster peers would need to set up TLS for their communication.

See Also

https://workbench.cisecurity.org/benchmarks/26831

Item Details

Category: IDENTIFICATION AND AUTHENTICATION, SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|IA-5(1), 800-53|SC-28, 800-53|SC-28(1), CSCv7|14.4

Plugin: Unix

Control ID: 780c0fa9ba9003a1e163ac1d16218dda76d4ad5f895c6ee41a2a0781672404d3