Ensure the --audit-log-maxbackup argument is set to 10 or as appropriate

Error: The --audit-log-maxbackup argument is not set appropriately

Bridgecrew Policy ID: BC_K8S_69
Checkov Check ID: CKV_K8S_93
Severity: LOW

The --audit-log-maxbackup argument is not set appropriately

Description

Retain 10 or an appropriate number of old log files. 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. For example, 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.

Fix - Buildtime

Kubernetes

  • Kind: Pod
apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    component: kube-apiserver
    tier: control-plane
  name: kube-apiserver
  namespace: kube-system
spec:
  containers:
  - command:
+   - kube-apiserver
+   - --audit-log-maxbackup=15
    image: gcr.io/google_containers/kube-apiserver-amd64:v1.6.0
    ...

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