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

Information

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.

Solution

Edit the `/etc/kubernetes/apiserver` file on the master node and set the `KUBE_API_ARGS` parameter to `'--audit-log-maxsize=100'`: `KUBE_API_ARGS='--audit-log-maxsize=100'`

Based on your system, restart the `kube-apiserver` service. For example: `systemctl restart kube-apiserver.service`

Impact:

None

See Also

https://workbench.cisecurity.org/files/1738

Item Details

Category: AUDIT AND ACCOUNTABILITY

References: 800-53|AU-4, CSCv6|6.3

Plugin: Unix

Control ID: e2434a9b9959104323acebf3ea1465ff35fe604cd5d066880a551541d176d07f