Service account private key file not defined

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Metadata

Id: ccc98ff7-68a7-436e-9218-185cb0b0b780

Cloud Provider: Kubernetes

Platform: Kubernetes

Severity: Medium

Category: Encryption

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Description

When kube-controller-manager is used, the --service-account-private-key-file flag should be set. This rule checks the containers and initContainers command fields for kube-controller-manager and verifies the presence of the --service-account-private-key-file flag. Setting this flag ensures the controller manager has a private key to sign service account tokens.

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: ["--service-account-private-key-file=/path/to/key/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","--service-account-private-key-file=/path/to/key/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