1.3.4 Ensure that the --service-account-private-key-file argument is set as appropriate

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Information

Explicitly set a service account private key file for service accounts on the controller manager.

Rationale:

To ensure that keys for service account tokens can be rotated as needed, a separate public/private key pair should be used for signing service account tokens. The private key should be specified to the controller manager with --service-account-private-key-file as appropriate.

Impact:

You would need to securely maintain the key file and rotate the keys based on your organization's key rotation policy.

Solution

Edit the Controller Manager pod specification file /etc/kubernetes/manifests/kube-controller-manager.yaml on the master node and set the --service-account-private-key-file parameter to the private key file for service accounts.

--service-account-private-key-file=<filename>

Default Value:

By default, --service-account-private-key-file it not set.

See Also

https://workbench.cisecurity.org/files/2968