Kubelet HTTPS set to false

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Metadata

Id: kubernetes-kubelet-https-set-to-false

Platform: Kubernetes

Severity: Medium

Category: Networking and Firewall

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Description

When using kube-apiserver, the --kubelet-https flag should be set to true or omitted; it must not be set to false. This rule checks container and initContainer command arguments for kube-apiserver and reports when --kubelet-https=false is present. Setting the flag to false disables HTTPS to the kubelet and results in insecure communication; set it to true or remove the flag to enforce secure connections.

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-apiserver-amd64:v1.6.0
      command: ["kube-apiserver"]
  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-apiserver-amd64:v1.6.0
      command: ["kube-apiserver"]
      args: ["--kubelet-https=true"]
  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-apiserver-amd64:v1.6.0
      command: ["kube-apiserver"]
      args: ["--kubelet-https=false"]
  restartPolicy: OnFailure