gcp_app_service_versions.yaml

# Copyright 2019 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.
#
apiVersion: templates.gatekeeper.sh/v1alpha1
kind: ConstraintTemplate
metadata:
  name: gcp-app-service-versions-v1
spec:
  crd:
    spec:
      names:
        kind: GCPAppEngineServiceVersionsConstraintV1
      validation:
        openAPIV3Schema:
          properties:
            max_versions:
              type: integer
              description: "The maximum number of simultaneous versions
               Defaults to 2"
  targets:
   validation.gcp.forsetisecurity.org:
      rego: | #INLINE("validator/app_service_versions.rego")
           #
           # Copyright 2019 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.
           #
           
           package templates.gcp.GCPAppEngineServiceVersionsConstraintV1
           
           import data.validator.gcp.lib as lib
           
           deny[{
           	"msg": message,
           	"details": metadata,
           }] {
           	constraint := input.constraint
           	params := lib.get_constraint_params(constraint)
           
           	# Restrict to App Engine services
           	asset := input.asset
           	asset.asset_type == "appengine.googleapis.com/Service"
           
           	# Check version count
           	max_versions := lib.get_default(params, "max_versions", 2)
           	version_count := count(asset.resource.data.split.allocations)
           	version_count > max_versions
           
           	message := sprintf("%v has more than %v versions (%v).", [asset.name, max_versions, version_count])
           	metadata := {
           		"constraint": params,
           		"resource": asset.name,
           	}
           }
           #ENDINLINE