solutions/kcc-namespaces/validation.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.
apiVersion: fn.kpt.dev/v1alpha1
kind: StarlarkRun
metadata: # kpt-merge: /validate-project-ns
  name: validate-project-ns
  annotations:
    config.kubernetes.io/local-config: 'true'
source: |
  def get_tenant_ns(resource_list):
    for resource in resource_list["items"]:
      if resource["kind"] == "Namespace":
        return resource["metadata"]["name"]
    fail("unable to find tenant project namespace")
  def get_projects_ns(resource_list):
    for resource in resource_list["items"]:
      # owner IAMPartialPolicy is expected to be in projects ns
      if resource["kind"] == "IAMPartialPolicy" and resource["metadata"]["name"].endswith("owners-permissions"):
        return resource["metadata"]["namespace"]
    fail("unable to find project owner IAMPartialPolicy")
  def get_mgmt_ns(resource_list):
    for resource in resource_list["items"]:
      # IAMServiceAccount is expected to be in management ns
      if resource["kind"] == "IAMServiceAccount" and resource["metadata"]["name"].startswith("kcc-"):
        return resource["metadata"]["namespace"]
    fail("unable to find project KCC SA")
  tenant_ns = get_tenant_ns(ctx.resource_list)
  projects_ns = get_projects_ns(ctx.resource_list)
  mgmt_ns = get_mgmt_ns(ctx.resource_list)
  if tenant_ns == projects_ns:
    fail("projects-namespace cannot be the same as tenant project")
  if tenant_ns == mgmt_ns:
    fail("management-namespace cannot be the same as tenant project")