# 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.
#########
# GCP SA
# AC-1 - Implementation of access control
# AC-3, AC-3(7), AC-16(2) - This service account possesses minimal privileges(permissions) and is restricted to performing only the necessary operations for resources within the designated namespace. The service account is associated with the current namespace and is assigned minimal permissions to create resources in this namespace only.
apiVersion: iam.cnrm.cloud.google.com/v1beta1
kind: IAMServiceAccount
metadata:
  name: client-name-projects-sa # kpt-set: ${client-name}-projects-sa
  namespace: client-name-config-control # kpt-set: ${client-name}-${management-namespace}
  annotations:
    cnrm.cloud.google.com/project-id: client-management-project-id # kpt-set: ${client-management-project-id}
    cnrm.cloud.google.com/ignore-clusterless: "true"
    config.kubernetes.io/depends-on: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/client-management-project-id # kpt-set: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/${client-management-project-id}
spec:
  # AC-3, AC-3(7), AC-16(2)
  displayName: client-name-projects-sa # kpt-set: ${client-name}-projects-sa
---
# Grant GCP role Project IAM Admin to GCP SA
apiVersion: iam.cnrm.cloud.google.com/v1beta1
kind: IAMPolicyMember
metadata:
  name: client-name-projects-sa-projectiamadmin-permissions # kpt-set: ${client-name}-projects-sa-projectiamadmin-permissions
  namespace: hierarchy
  annotations:
    cnrm.cloud.google.com/ignore-clusterless: "true"
    config.kubernetes.io/depends-on: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/client-management-project-id # kpt-set: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/${client-management-project-id}
spec:
  resourceRef:
    apiVersion: resourcemanager.cnrm.cloud.google.com/v1beta1
    kind: Folder
    name: clients.client-name # kpt-set: clients.${client-name}
  # AC-1, AC-3, AC-3(7), AC-16(2)
  role: roles/resourcemanager.projectIamAdmin
  member: "serviceAccount:client-name-projects-sa@client-management-project-id.iam.gserviceaccount.com" # kpt-set: serviceAccount:${client-name}-projects-sa@${client-management-project-id}.iam.gserviceaccount.com
---
# Grant GCP role Project Creator to GCP SA
apiVersion: iam.cnrm.cloud.google.com/v1beta1
kind: IAMPolicyMember
metadata:
  name: client-name-projects-sa-projectcreator-permissions # kpt-set: ${client-name}-projects-sa-projectcreator-permissions
  namespace: hierarchy
  annotations:
    cnrm.cloud.google.com/ignore-clusterless: "true"
    config.kubernetes.io/depends-on: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/client-management-project-id # kpt-set: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/${client-management-project-id}
spec:
  resourceRef:
    apiVersion: resourcemanager.cnrm.cloud.google.com/v1beta1
    kind: Folder
    name: clients.client-name # kpt-set: clients.${client-name}
  # AC-1, AC-3, AC-3(7), AC-16(2)
  role: roles/resourcemanager.projectCreator
  member: "serviceAccount:client-name-projects-sa@client-management-project-id.iam.gserviceaccount.com" # kpt-set: serviceAccount:${client-name}-projects-sa@${client-management-project-id}.iam.gserviceaccount.com
---
# Grant GCP role Project Mover to GCP SA
apiVersion: iam.cnrm.cloud.google.com/v1beta1
kind: IAMPolicyMember
metadata:
  name: client-name-projects-sa-projectmover-permissions # kpt-set: ${client-name}-projects-sa-projectmover-permissions
  namespace: hierarchy
  annotations:
    cnrm.cloud.google.com/ignore-clusterless: "true"
    config.kubernetes.io/depends-on: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/client-management-project-id # kpt-set: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/${client-management-project-id}
spec:
  resourceRef:
    apiVersion: resourcemanager.cnrm.cloud.google.com/v1beta1
    kind: Folder
    name: clients.client-name # kpt-set: clients.${client-name}
  # AC-1, AC-3, AC-3(7), AC-16(2)
  role: roles/resourcemanager.projectMover
  member: "serviceAccount:client-name-projects-sa@client-management-project-id.iam.gserviceaccount.com" # kpt-set: serviceAccount:${client-name}-projects-sa@${client-management-project-id}.iam.gserviceaccount.com
---
# Grant GCP role Project Deleter to GCP SA
apiVersion: iam.cnrm.cloud.google.com/v1beta1
kind: IAMPolicyMember
metadata:
  name: client-name-projects-sa-projectdeleter-permissions # kpt-set: ${client-name}-projects-sa-projectdeleter-permissions
  namespace: hierarchy
  annotations:
    cnrm.cloud.google.com/ignore-clusterless: "true"
    config.kubernetes.io/depends-on: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/client-management-project-id # kpt-set: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/${client-management-project-id}
spec:
  resourceRef:
    apiVersion: resourcemanager.cnrm.cloud.google.com/v1beta1
    kind: Folder
    name: clients.client-name # kpt-set: clients.${client-name}
  # AC-1, AC-3, AC-3(7), AC-16(2)
  role: roles/resourcemanager.projectDeleter
  member: "serviceAccount:client-name-projects-sa@client-management-project-id.iam.gserviceaccount.com" # kpt-set: serviceAccount:${client-name}-projects-sa@${client-management-project-id}.iam.gserviceaccount.com
---
# Grant GCP role Service Usage Admin to GCP SA
apiVersion: iam.cnrm.cloud.google.com/v1beta1
kind: IAMPolicyMember
metadata:
  name: client-name-projects-sa-serviceusageadmin-permissions # kpt-set: ${client-name}-projects-sa-serviceusageadmin-permissions
  namespace: hierarchy
  annotations:
    cnrm.cloud.google.com/ignore-clusterless: "true"
    config.kubernetes.io/depends-on: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/client-management-project-id # kpt-set: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/${client-management-project-id}
spec:
  resourceRef:
    apiVersion: resourcemanager.cnrm.cloud.google.com/v1beta1
    kind: Folder
    name: clients.client-name # kpt-set: clients.${client-name}
  # AC-1, AC-3, AC-3(7), AC-16(2)
  role: roles/serviceusage.serviceUsageAdmin
  member: "serviceAccount:client-name-projects-sa@client-management-project-id.iam.gserviceaccount.com" # kpt-set: serviceAccount:${client-name}-projects-sa@${client-management-project-id}.iam.gserviceaccount.com
---
# Grant GCP role Billing User to GCP SA
# This role cannot be defined at a folder level. It can only be set at the org level.
apiVersion: iam.cnrm.cloud.google.com/v1beta1
kind: IAMPolicyMember
metadata:
  name: client-name-projects-sa-billinguser-permissions # kpt-set: ${client-name}-projects-sa-billinguser-permissions
  namespace: config-control # kpt-set: ${management-namespace}
  annotations:
    cnrm.cloud.google.com/ignore-clusterless: "true"
    config.kubernetes.io/depends-on: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/client-management-project-id # kpt-set: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/${client-management-project-id}
spec:
  resourceRef:
    apiVersion: resourcemanager.cnrm.cloud.google.com/v1beta1
    kind: Organization
    external: "123456789012" # kpt-set: ${org-id}
  # AC-1, AC-3, AC-3(7), AC-16(2)
  role: roles/billing.user
  member: "serviceAccount:client-name-projects-sa@client-management-project-id.iam.gserviceaccount.com" # kpt-set: serviceAccount:${client-name}-projects-sa@${client-management-project-id}.iam.gserviceaccount.com
---
# K8S SA
apiVersion: iam.cnrm.cloud.google.com/v1beta1
kind: IAMPartialPolicy
metadata:
  name: client-name-projects-sa-workload-identity-binding # kpt-set: ${client-name}-projects-sa-workload-identity-binding
  namespace: client-name-config-control # kpt-set: ${client-name}-${management-namespace}
  annotations:
    cnrm.cloud.google.com/ignore-clusterless: "true"
    config.kubernetes.io/depends-on: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/client-management-project-id # kpt-set: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/${client-management-project-id}
spec:
  resourceRef:
    name: client-name-projects-sa # kpt-set: ${client-name}-projects-sa
    apiVersion: iam.cnrm.cloud.google.com/v1beta1
    kind: IAMServiceAccount
  # AC-1, AC-3, AC-3(7), AC-16(2)
  bindings:
    - role: roles/iam.workloadIdentityUser
      members:
        - member: serviceAccount:management-project-id.svc.id.goog[cnrm-system/cnrm-controller-manager-client-name-projects] # kpt-set: serviceAccount:${management-project-id}.svc.id.goog[cnrm-system/cnrm-controller-manager-${client-name}-projects]
---
# K8S namespace
apiVersion: v1
kind: Namespace
metadata:
  name: client-name-projects # kpt-set: ${client-name}-projects
  annotations:
    cnrm.cloud.google.com/ignore-clusterless: "true"
---
# Link GCP SA to K8S namespace
apiVersion: core.cnrm.cloud.google.com/v1beta1
kind: ConfigConnectorContext
metadata:
  name: configconnectorcontext.core.cnrm.cloud.google.com
  namespace: client-name-projects # kpt-set: ${client-name}-projects
  annotations:
    cnrm.cloud.google.com/ignore-clusterless: "true"
    config.kubernetes.io/depends-on: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/client-management-project-id # kpt-set: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/${client-management-project-id}
spec:
  # AC-3, AC-3(7), AC-16(2)
  googleServiceAccount: client-name-projects-sa@client-management-project-id.iam.gserviceaccount.com # kpt-set: ${client-name}-projects-sa@${client-management-project-id}.iam.gserviceaccount.com
---
# Grant viewer role on the config control namespace to projects K8S SA
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: allow-resource-reference-from-projects
  namespace: client-name-config-control # kpt-set: ${client-name}-${management-namespace}
  annotations:
    cnrm.cloud.google.com/ignore-clusterless: "true"
    config.kubernetes.io/depends-on: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/client-management-project-id # kpt-set: resourcemanager.cnrm.cloud.google.com/namespaces/projects/Project/${client-management-project-id}
roleRef:
  # AC-1, AC-3, AC-3(7), AC-16(2)
  name: cnrm-viewer
  kind: ClusterRole
  apiGroup: rbac.authorization.k8s.io
subjects:
  - name: cnrm-controller-manager-client-name-projects # kpt-set: cnrm-controller-manager-${client-name}-projects
    namespace: cnrm-system
    kind: ServiceAccount
