Root CA file not defined

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Metadata

Id: 05fb986f-ac73-4ebb-a5b2-7faafa93d882

Cloud Provider: k8s

Platform: Kubernetes

Severity: Medium

Category: Encryption

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Description

Containers (including initContainers) that run kube-controller-manager should include the --root-ca-file flag. This flag specifies the path to the root CA certificate used to validate TLS certificates; without it the controller manager may not validate certificates correctly. The rule reports a MissingAttribute when the --root-ca-file flag is not present in the container’s command.

Compliant Code Examples

apiVersion: v1
kind: Pod
metadata:
  name: command-demo
  labels:
    purpose: demonstrate-command
spec:
  containers:
    - name: command-demo-container
      image: gcr.io/google_containers/kube-controller-manager-amd64:v1.6.0
      command: ["kube-controller-manager"]
      args: ["--root-ca-file=/path/to/ca/file.pem"]
  restartPolicy: OnFailure

apiVersion: v1
kind: Pod
metadata:
  name: command-demo
  labels:
    purpose: demonstrate-command
spec:
  containers:
    - name: command-demo-container
      image: gcr.io/google_containers/kube-controller-manager-amd64:v1.6.0
      command: ["kube-controller-manager","--root-ca-file=/path/to/ca/file.pem"]
      args: []
  restartPolicy: OnFailure

Non-Compliant Code Examples

apiVersion: v1
kind: Pod
metadata:
  name: command-demo
  labels:
    purpose: demonstrate-command
spec:
  containers:
    - name: command-demo-container
      image: gcr.io/google_containers/kube-controller-manager-amd64:v1.6.0
      command: ["kube-controller-manager"]
      args: []
  restartPolicy: OnFailure