The Kubernetes API Server must be set to audit log max size.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-242462	CNTR-K8-003290	SV-242462r961863_rule		Medium

Description

The Kubernetes API Server must be set for enough storage to retain log information over the period required. When audit logs are large in size, the monitoring service for events becomes degraded. The function of the maximum log file size is to set these limits.

STIG	Date
Kubernetes Security Technical Implementation Guide	2024-08-22

Details

Check Text (C-45737r927135_chk)

Change to the /etc/kubernetes/manifests/ directory on the Kubernetes Control Plane. Run the command:
grep -i audit-log-maxsize *

If the setting "--audit-log-maxsize" is not set in the Kubernetes API Server manifest file or it is set to less than "100", this is a finding.

Fix Text (F-45695r927136_fix)

Edit the Kubernetes API Server manifest file in the /etc/kubernetes/manifests directory on the Kubernetes Control Plane.

Set the value of "--audit-log-maxsize" to a minimum of "100".