# 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.
#########
# Since we are using GKE Workload Identity we must complete the following steps outlined in
# [Implementing Policy Controller Metrics](https://cloud.google.com/anthos-config-management/docs/how-to/policy-controller-metrics)
# to implement Policy Controller Metrics and avoid numerous IAM errors on the Config Controller instance.
#########
# GCP SA
# AC-3(7) - Creates lower priv service account for Policy Controller metrics
apiVersion: iam.cnrm.cloud.google.com/v1beta1
kind: IAMServiceAccount
metadata:
  name: gatekeeper-admin-sa
  namespace: config-control # kpt-set: ${management-namespace}
  annotations:
    cnrm.cloud.google.com/project-id: management-project-id # kpt-set: ${management-project-id}
    cnrm.cloud.google.com/ignore-clusterless: "true"
spec:
  displayName: gatekeeper-admin-sa
---
# Grant GCP role Metrics Writer to gatekeeper-admin SA on KCC Project
# AC-3(7) - RBAC role to account with required permissions for Policy Controller metrics
apiVersion: iam.cnrm.cloud.google.com/v1beta1
kind: IAMPolicyMember
metadata:
  name: gatekeeper-admin-sa-metric-writer-permissions
  namespace: config-control # kpt-set: ${management-namespace}
  annotations:
    cnrm.cloud.google.com/project-id: management-project-id # kpt-set: ${management-project-id}
    cnrm.cloud.google.com/ignore-clusterless: "true"
spec:
  resourceRef:
    apiVersion: resourcemanager.cnrm.cloud.google.com/v1beta1
    kind: Project
    external: management-project-id # kpt-set: ${management-project-id}
  role: roles/monitoring.metricWriter
  member: "serviceAccount:gatekeeper-admin-sa@management-project-id.iam.gserviceaccount.com" # kpt-set: serviceAccount:gatekeeper-admin-sa@${management-project-id}.iam.gserviceaccount.com
---
# K8S SA
apiVersion: iam.cnrm.cloud.google.com/v1beta1
kind: IAMPartialPolicy
metadata:
  name: gatekeeper-admin-sa-workload-identity-binding
  namespace: config-control # kpt-set: ${management-namespace}
  annotations:
    cnrm.cloud.google.com/project-id: management-project-id # kpt-set: ${management-project-id}
    cnrm.cloud.google.com/ignore-clusterless: "true"
spec:
  resourceRef:
    name: gatekeeper-admin-sa
    apiVersion: iam.cnrm.cloud.google.com/v1beta1
    kind: IAMServiceAccount
  bindings:
    - role: roles/iam.workloadIdentityUser
      members:
        - member: serviceAccount:management-project-id.svc.id.goog[gatekeeper-system/gatekeeper-admin] # kpt-set: serviceAccount:${management-project-id}.svc.id.goog[gatekeeper-system/gatekeeper-admin]
---
# Link GCP SA to K8S namespace
apiVersion: core.cnrm.cloud.google.com/v1beta1
kind: ConfigConnectorContext
metadata:
  name: configconnectorcontext.core.cnrm.cloud.google.com
  namespace: gatekeeper-system
  annotations:
    cnrm.cloud.google.com/ignore-clusterless: "true"
spec:
  googleServiceAccount: gatekeeper-admin-sa@management-project-id.iam.gserviceaccount.com # kpt-set: gatekeeper-admin-sa@${management-project-id}.iam.gserviceaccount.com
