# Copyright 2018 The Kubernetes Authors All rights reserved.
#
# 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.

# This YAML file contains all RBAC objects that are necessary to run external
# CSI provisioner.
#
# In production, each CSI driver deployment has to be customized:
# - to avoid conflicts, use non-default namespace and different names
#   for non-namespaced entities like the ClusterRole
# - decide whether the deployment replicates the external CSI
#   provisioner, in which case leadership election must be enabled;
#   this influences the RBAC setup, see below

apiVersion: v1
kind: ServiceAccount
metadata:
  name: csi-provisioner
  namespace: kube-system

---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: external-provisioner-runner
rules:
  # The following rule should be uncommented for plugins that require secrets
  # for provisioning.
  # - apiGroups: [""]
  #   resources: ["secrets"]
  #   verbs: ["get", "list"]
  - apiGroups: [""]
    resources: ["persistentvolumes"]
    verbs: ["get", "list", "watch", "create", "delete"]
  - apiGroups: [""]
    resources: ["persistentvolumeclaims"]
    verbs: ["get", "list", "watch", "update"]
  - apiGroups: ["storage.k8s.io"]
    resources: ["storageclasses"]
    verbs: ["get", "list", "watch"]
  - apiGroups: [""]
    resources: ["events"]
    verbs: ["list", "watch", "create", "update", "patch"]
  - apiGroups: ["snapshot.storage.k8s.io"]
    resources: ["volumesnapshots"]
    verbs: ["get", "list"]
  - apiGroups: ["snapshot.storage.k8s.io"]
    resources: ["volumesnapshotcontents"]
    verbs: ["get", "list"]
  - apiGroups: ["storage.k8s.io"]
    resources: ["csinodes"]
    verbs: ["get", "list", "watch"]
  - apiGroups: [""]
    resources: ["nodes"]
    verbs: ["get", "list", "watch"]
  # Access to volumeattachments is only needed when the CSI driver
  # has the PUBLISH_UNPUBLISH_VOLUME controller capability.
  # In that case, external-provisioner will watch volumeattachments
  # to determine when it is safe to delete a volume.
  - apiGroups: ["storage.k8s.io"]
    resources: ["volumeattachments"]
    verbs: ["get", "list", "watch"]

---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: csi-provisioner-role
subjects:
  - kind: ServiceAccount
    name: csi-provisioner
    namespace: kube-system
roleRef:
  kind: ClusterRole
  name: external-provisioner-runner
  apiGroup: rbac.authorization.k8s.io

---
# Provisioner must be able to work with endpoints in current namespace
# if (and only if) leadership election is enabled
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  namespace: kube-system
  name: external-provisioner-cfg
rules:
# Only one of the following rules for endpoints or leases is required based on
# what is set for `--leader-election-type`. Endpoints are deprecated in favor of Leases.
- apiGroups: ["coordination.k8s.io"]
  resources: ["leases"]
  verbs: ["get", "watch", "list", "delete", "update", "create"]
# Permissions for CSIStorageCapacity are only needed enabling the publishing
# of storage capacity information.
- apiGroups: ["storage.k8s.io"]
  resources: ["csistoragecapacities"]
  verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]
# The GET permissions below are needed for walking up the ownership chain
# for CSIStorageCapacity. They are sufficient for deployment via
# StatefulSet (only needs to get Pod) and Deployment (needs to get
# Pod and then ReplicaSet to find the Deployment).
- apiGroups: [""]
  resources: ["pods"]
  verbs: ["get"]
- apiGroups: ["apps"]
  resources: ["replicasets"]
  verbs: ["get"]

---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: csi-provisioner-role-cfg
  namespace: kube-system
subjects:
  - kind: ServiceAccount
    name: csi-provisioner
    namespace: kube-system
roleRef:
  kind: Role
  name: external-provisioner-cfg
  apiGroup: rbac.authorization.k8s.io
