policies/constraints/iam_restrict_domain.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
#
#     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.
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apiVersion: constraints.gatekeeper.sh/v1alpha1
kind: GCPIAMAllowedPolicyMemberDomainsConstraintV2
metadata:
  name: only_my_domain
  annotations:
    bundles.validator.forsetisecurity.org/forseti-security: v2.26.0
    bundles.validator.forsetisecurity.org/healthcare-baseline-v1: security
    description: Only allow members from my domain to be added to IAM roles
spec:
  severity: high
  match:
    target: # {"$ref":"#/definitions/io.k8s.cli.setters.target_fldr_trusted"}
    - "organizations/**"
    exclude: []
  parameters:
    domains:
    - DOMAIN # {"$ref":"#/definitions/io.k8s.cli.setters.domain"}
    - gserviceaccount.com # also allow service accounts