fix: update permission bits for kubelet-exec-start-conf

[Sparksssj]

Issue number: Closes #4173

Description of changes: Changed the mode code for configuration-files.kubelet-exec-start-conf, such that it will not generate error message.

Testing done: Required migration test was done.

Terms of contribution:

By submitting this pull request, I agree that this contribution is dual-licensed under the terms of both the Apache License, version 2.0, and the MIT license.

[bcressey]

Can you verify that the file permissions are not flagged by the CIS Kubernetes report (at either level)?

[Sparksssj]

Can you verify that the file permissions are not flagged by the CIS Kubernetes report (at either level)?

Sorry but I'm not quite understand what this means.

[bcressey]

Sorry but I'm not quite understand what this means.

On an image with your changes applied, run this command and check the output:

$ apiclient report cis-k8s -l 2
Benchmark name:  CIS Kubernetes Benchmark (Worker Node)
Version:         v1.8.0
Reference:       https://www.cisecurity.org/benchmark/kubernetes
Benchmark level: 1
Start time:      2024-09-25T21:04:00.514761119Z

[PASS] 4.1.1     Ensure that the kubelet service file permissions are set to 644 or more restrictive (Automatic)
...
Compliance check result: PASS

It needs to continue to say "PASS" for both the 4.1.1 check and the final result.

[bcressey]

It would also be good to check the journal before and after, to confirm that the warnings are no longer logged.

[Sparksssj]

I've confirmed the report shows PASS here.

[bcressey]

@Sparksssj can you also verify that the warnings from the related issue are no longer present?

[Sparksssj]

@Sparksssj can you also verify that the warnings from the related issue are no longer present?

Yes I confirm that this warning exist in previous version, and disappeared after the change.