host-network.yaml

# Copyright 2024 Google LLC
#
# This is “Software” that is licensed under the “General Software” section of
# the Service Specific Terms (https://cloud.google.com/terms/service-terms) for
# usage in accordance with the following “Scope of Use”: This file may only be
# used on an Anthos cluster, including any associated ci/cd use. “Anthos
# cluster” is defined as “A Cluster (of any kind) registered to a fleet project
# where the Anthos API is enabled”.
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sPSPHostNetworkingPorts
metadata:
  name: nsa-cisa-k8s-v1.2-host-network
  labels:
    policycontroller.gke.io/bundleName: nsa-cisa-k8s-v1.2
  annotations:
    policycontroller.gke.io/bundleVersion: "202312.1"
    policycontroller.gke.io/constraintData: |-
      "{
        bundleName: 'nsa-cisa-k8s-v1.2',
        bundleDisplayName: 'NSA CISA Kubernetes Hardening Guide v1.2',
        bundleLink: 'https://cloud.google.com/anthos-config-management/docs/how-to/using-nsa-cisa-k8s-v1.2',
        bundleVersion: '202312.1',
        bundleDescription: 'Use the NSA CISA Kubernetes Hardening Guide v1.2 policy bundle with Policy Controller to evaluate the compliance of your cluster resources against some aspects of the NSA CISA Kubernetes Hardening Guide v1.2.',
        controlNumbers: '[]',
        severity: 'Low',
        description: 'Restricts containers from running with the `hostNetwork` flag set to `true`.',
        remediation: 'Containers cannot run with `hostNetwork` set to `true`. Remove `hostNetwork: true` from your containers.',
        minimumTemplateLibraryVersion: '1.11.1',
        constraintHash: '0a5a8fab505744697e9c36858e534c6204888d96e7c81e8d04279f4e0f7287d7'
      }"
spec:
  enforcementAction: dryrun
  match:
    kinds:
    - apiGroups:
      - ""
      kinds:
      - Pod
    excludedNamespaces:
    - kube-system
  parameters:
    hostNetwork: false
    min: 1
    max: 65535