InformationEnsure that the controller-manager.conf file has permissions of 644 or more restrictive.
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.
SolutionRun the below command (based on the file location on your system) on the master node. For example,
chmod 644 /etc/kubernetes/controller-manager.conf
By default, controller-manager.conf has permissions of 640.