cluster_binary_authorization.rego

# Copyright 2022 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# METADATA
# title: Enable binary authorization in the cluster
# description: GKE cluster should enable for deploy-time security control that ensures only trusted container images are deployed to gain tighter control over your container environment.
# custom:
#   group: Management
#   severity: Low
#   recommendation: >
#     Enable Binary Authorization API on the cluster project.
#     Next, navigate to the GKE page in Google Cloud Console and select the name of the cluster. Under Security, in the row for "Binary Authorization", click the edit icon.
#     Select the "Enable Binary Authorization" checkbox and click "Save changes".
#   externalURI: https://cloud.google.com/binary-authorization/docs/setting-up
#   sccCategory: BINARY_AUTHORIZATION_DISABLED
#   cis:
#     version: "1.4"
#     id: "5.10.5"
#   dataSource: gke
package gke.policy.cluster_binary_authorization

import future.keywords.if
import future.keywords.contains

default valid := false

valid if {
  count(violation) == 0
}

violation contains msg if {
  not input.data.gke.binary_authorization.enabled
  msg := "Cluster is not configured with binary authorization"
}