apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: istiod-istio-system
  labels:
    app: istiod
    release: istio
rules:
  # sidecar injection controller
  - apiGroups: ["admissionregistration.k8s.io"]
    resources: ["mutatingwebhookconfigurations"]
    verbs: ["get", "list", "watch", "update", "patch"]

  # configuration validation webhook controller
  - apiGroups: ["admissionregistration.k8s.io"]
    resources: ["validatingwebhookconfigurations"]
    verbs: ["get", "list", "watch", "update"]

  # istio configuration
  # removing CRD permissions can break older versions of Istio running alongside this control plane (https://github.com/istio/istio/issues/29382)
  # please proceed with caution
  - apiGroups: ["config.istio.io", "security.istio.io", "networking.istio.io", "authentication.istio.io", "rbac.istio.io", "telemetry.istio.io"]
    verbs: ["get", "watch", "list"]
    resources: ["*"]
  - apiGroups: ["networking.istio.io"]
    verbs: [ "get", "watch", "list", "update", "patch", "create", "delete" ]
    resources: [ "workloadentries" ]
  - apiGroups: ["networking.istio.io"]
    verbs: [ "get", "watch", "list", "update", "patch", "create", "delete" ]
    resources: [ "workloadentries/status" ]

  # auto-detect installed CRD definitions
  - apiGroups: ["apiextensions.k8s.io"]
    resources: ["customresourcedefinitions"]
    verbs: ["get", "list", "watch"]

  # discovery and routing
  - apiGroups: [""]
    resources: ["pods", "nodes", "services", "namespaces", "endpoints"]
    verbs: ["get", "list", "watch"]
  - apiGroups: ["discovery.k8s.io"]
    resources: ["endpointslices"]
    verbs: ["get", "list", "watch"]

  # ingress controller
  - apiGroups: ["networking.k8s.io"]
    resources: ["ingresses", "ingressclasses"]
    verbs: ["get", "list", "watch"]
  - apiGroups: ["networking.k8s.io"]
    resources: ["ingresses/status"]
    verbs: ["*"]

  # required for CA's namespace controller
  - apiGroups: [""]
    resources: ["configmaps"]
    verbs: ["create", "get", "list", "watch", "update"]

  # Istiod and bootstrap.
  - apiGroups: ["certificates.k8s.io"]
    resources:
      - "certificatesigningrequests"
      - "certificatesigningrequests/approval"
      - "certificatesigningrequests/status"
    verbs: ["update", "create", "get", "delete", "watch"]
  - apiGroups: ["certificates.k8s.io"]
    resources:
      - "signers"
    resourceNames:
    - "kubernetes.io/legacy-unknown"
    verbs: ["approve"]

  # Used by Istiod to verify the JWT tokens
  - apiGroups: ["authentication.k8s.io"]
    resources: ["tokenreviews"]
    verbs: ["create"]

  # Used by Istiod to verify gateway SDS
  - apiGroups: ["authorization.k8s.io"]
    resources: ["subjectaccessreviews"]
    verbs: ["create"]

  # Use for Kubernetes Service APIs
  - apiGroups: ["networking.x-k8s.io"]
    resources: ["*"]
    verbs: ["get", "watch", "list"]
  - apiGroups: ["networking.x-k8s.io"]
    resources: ["*"] # TODO: should be on just */status but wildcard is not supported
    verbs: ["update"]

  # Needed for multicluster secret reading, possibly ingress certs in the future
  - apiGroups: [""]
    resources: ["secrets"]
    verbs: ["get", "watch", "list"]

  # Used for MCS serviceexport management
  - apiGroups: ["multicluster.x-k8s.io"]
    resources: ["serviceexports"]
    verbs: ["get", "watch", "list", "create", "delete"]
