1.2.21 Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate

[scfast]

Profile Applicability:
• Level 1 - Master Node

Description:
Rotate log files on reaching 100 MB or as appropriate.

Rationale:
Kubernetes automatically rotates the log files. Retaining old log files ensures that you
would have sufficient log data available for carrying out any investigation or correlation.
If you have set file size of 100 MB and the number of old log files to keep as 10, you
would approximate have 1 GB of log data that you could potentially use for your
analysis.

Impact:
None

Audit:
Run the following command on the Control Plane node:
ps -ef | grep kube-apiserver
Verify that the --audit-log-maxsize argument is set to 100 or as appropriate.

Default Value:
By default, auditing is not enabled.

References:

1. https://kubernetes.io/docs/admin/kube-apiserver/
2. https://kubernetes.io/docs/concepts/cluster-administration/audit/
3. API Audit Logging kubernetes/enhancements#22