banned-key-template.yaml

# Copyright 2021 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
#
#     http://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.
# [START anthosconfig_ci_pipeline_unstructured_banned_key_template] 
apiVersion: templates.gatekeeper.sh/v1beta1
kind: ConstraintTemplate
metadata:
  name: k8sbannedconfigmapkeysv1
spec:
  crd:
    spec:
      names:
        kind: K8sBannedConfigMapKeysV1
        validation:
          openAPIV3Schema:
            properties:
              keys:
                type: array
                items:
                  type: string
  targets:
    - target: admission.k8s.gatekeeper.sh
      rego: |-
        package ban_keys

        violation[{"msg": sprintf("%v", [val])}] {
          keys = {key | input.review.object.data[key]}
          banned = {key | input.parameters.keys[_] = key}
          overlap = keys & banned
          count(overlap) > 0
          val := sprintf("The following banned keys are being used in the config map: %v", [overlap])
        }
# [END anthosconfig_ci_pipeline_unstructured_banned_key_template]