Information
Ensure that the controller-manager.conf file has permissions of 644 or more restrictive.
Rationale:
The controller-manager.conf file is the kubeconfig file for the Controller Manager. You should restrict its file permissions to maintain the integrity of the file. The file should be writable by only the administrators on the system.
Solution
Run the below command (based on the file location on your system) on the master node. For example,
chmod 644 /etc/kubernetes/controller-manager.conf
Impact:
None
Default Value:
By default, controller-manager.conf has permissions of 640.
References:
https://kubernetes.io/docs/admin/kube-controller-manager/