Logs for API server audits should be retained for 30 days
Set up the kubernetes integration.
Description
Retain the logs for at least 30 days or as appropriate.
Rationale
Retaining logs for at least 30 days ensures that you can go back in time and investigate or correlate any events. Set your audit log retention period to 30 days or as per your business requirements.
Audit
Run the following command on the master node:
ps -ef | grep kube-apiserver
Verify that the --audit-log-maxage argument is set to 30 or as appropriate.
Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml on the master node and set the --audit-log-maxage parameter to 30 or as an appropriate number of days: --audit-log-maxage=30
Impact
None
Default value
By default, auditing is not enabled.
References
- https://kubernetes.io/docs/admin/kube-apiserver/
- https://kubernetes.io/docs/concepts/cluster-administration/audit/
- https://github.com/kubernetes/features/issues/22
CIS controls
Version 6 6.3 Ensure Audit Logging Systems Are Not Subject To Loss (i.e. rotation/archive) Ensure that all systems that store logs have adequate storage space for the logs generated on a regular basis, so that log files will not fill up between log rotation intervals. The logs must be archived and digitally signed on a periodic basis. Version 7 6.4 Ensure adequate storage for logs Ensure that all systems that store logs have adequate storage space for the logs generated.
