# Minimum RBAC for the ORB Kubernetes provider running in-cluster.
#
# Apply with:
#     kubectl apply -f docs/root/providers/k8s/rbac.yaml
#
# Scope:
#   - Single-namespace mode.  For multi-namespace mode duplicate the Role +
#     RoleBinding per namespace, or upgrade to ClusterRole + ClusterRoleBinding
#     for cluster-scoped watches (`namespaces: ["*"]`).
#
# Adjust:
#   - `metadata.namespace` to match where ORB runs.
#   - The verbs list to drop any handler you do not use (e.g. drop
#     `apps` / `deployments` if you only use the Pod handler).
#
# Opt-in sections:
#   - events_watch_enabled     — events rule in the Role below
#   - node_watch_enabled       — nodes rule in the ClusterRole section below
#                                (always requires ClusterRole, even in single-namespace mode)
#   - inbound_auth_enabled     — TokenReview ClusterRoleBinding at the end
#
# References:
#   - docs/root/providers/k8s/auth.md
#   - docs/root/providers/k8s/configuration.md

apiVersion: v1
kind: Namespace
metadata:
  name: orb

---

apiVersion: v1
kind: ServiceAccount
metadata:
  name: orb
  namespace: orb

---

apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: orb
  namespace: orb
rules:
  # Core — required for the Pod handler and for the watch task.
  - apiGroups: [""]
    resources: ["pods"]
    verbs: ["get", "list", "watch", "create", "patch", "delete"]
  - apiGroups: [""]
    resources: ["pods/status"]
    verbs: ["get"]
  # Pod logs — optional; useful for diagnosing handler creation failures.
  - apiGroups: [""]
    resources: ["pods/log"]
    verbs: ["get"]
  # Events — required when `events_watch_enabled: true` (default: false).
  # The events watcher streams CoreV1Api.list_event_for_all_namespaces
  # filtered to involvedObject.kind=Node and caches Karpenter
  # node-disruption events.  A namespace-scoped Role suffices for
  # single-namespace mode; upgrade to ClusterRole when namespaces=["*"].
  # Omit this rule when events_watch_enabled is False.
  - apiGroups: [""]
    resources: ["events"]
    verbs: ["get", "list", "watch"]

  # apps/v1 — required for the Deployment and StatefulSet handlers.
  - apiGroups: ["apps"]
    resources: ["deployments", "statefulsets"]
    verbs: ["get", "list", "watch", "create", "patch", "delete"]
  - apiGroups: ["apps"]
    resources: ["deployments/status", "statefulsets/status"]
    verbs: ["get"]
  # Scale subresource — required for Deployment/StatefulSet handlers and
  # for START_INSTANCES / STOP_INSTANCES (scale to 0 / restore replicas).
  - apiGroups: ["apps"]
    resources: ["deployments/scale", "statefulsets/scale"]
    verbs: ["get", "patch"]

  # batch/v1 — required for the Job handler.
  - apiGroups: ["batch"]
    resources: ["jobs"]
    verbs: ["get", "list", "watch", "create", "patch", "delete"]
  - apiGroups: ["batch"]
    resources: ["jobs/status"]
    verbs: ["get"]

---

apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: orb
  namespace: orb
subjects:
  - kind: ServiceAccount
    name: orb
    namespace: orb
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: orb

# ---------------------------------------------------------------------------
# Cluster-scoped variant
# ---------------------------------------------------------------------------
# Use this section INSTEAD of the Role + RoleBinding above when you set
# `namespaces: ["*"]` in K8sProviderConfig (cluster-scoped watch mode).
# The watcher must be able to list/watch the target resource types across all
# namespaces; a namespaced Role cannot grant that.
#
# Apply with:
#     kubectl apply -f docs/root/providers/k8s/rbac-cluster-scoped.yaml
# or inline by replacing the Role + RoleBinding section above.
#
# NOTE: ClusterRole + ClusterRoleBinding grant permissions cluster-wide.
# Review with your security team before applying in shared clusters.

---

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: orb
  labels:
    app.kubernetes.io/name: orb
    app.kubernetes.io/component: cluster-scoped-watch
rules:
  # Core — required for the Pod handler and for the cluster-scoped watch task.
  - apiGroups: [""]
    resources: ["pods"]
    verbs: ["get", "list", "watch", "create", "patch", "delete"]
  - apiGroups: [""]
    resources: ["pods/status"]
    verbs: ["get"]
  # Pod logs — optional; useful for diagnosing handler creation failures.
  - apiGroups: [""]
    resources: ["pods/log"]
    verbs: ["get"]
  # Events — required when `events_watch_enabled: true` (default: false).
  # See events_watch_enabled note in the Role section above.
  - apiGroups: [""]
    resources: ["events"]
    verbs: ["get", "list", "watch"]
  # Nodes — required when `node_watch_enabled: true` (default: false).
  # The node watcher streams CoreV1Api.list_node to cache per-node metadata
  # (instance type, availability zone, capacity type, CPU/memory capacity)
  # and enriches per-instance provider_data in get_status responses.
  # Nodes are cluster-scoped; a namespaced Role cannot grant this permission.
  # This rule is always placed here (not in the namespaced Role) because
  # node access is inherently cluster-scoped regardless of provider mode.
  # Omit this rule when node_watch_enabled is False (the default).
  - apiGroups: [""]
    resources: ["nodes"]
    verbs: ["get", "list", "watch"]

  # apps/v1 — required for the Deployment and StatefulSet handlers.
  - apiGroups: ["apps"]
    resources: ["deployments", "statefulsets"]
    verbs: ["get", "list", "watch", "create", "patch", "delete"]
  - apiGroups: ["apps"]
    resources: ["deployments/status", "statefulsets/status"]
    verbs: ["get"]
  # Scale subresource — required for Deployment/StatefulSet handlers and
  # for START_INSTANCES / STOP_INSTANCES.
  - apiGroups: ["apps"]
    resources: ["deployments/scale", "statefulsets/scale"]
    verbs: ["get", "patch"]

  # batch/v1 — required for the Job handler.
  - apiGroups: ["batch"]
    resources: ["jobs"]
    verbs: ["get", "list", "watch", "create", "patch", "delete"]
  - apiGroups: ["batch"]
    resources: ["jobs/status"]
    verbs: ["get"]

---

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: orb
  labels:
    app.kubernetes.io/name: orb
    app.kubernetes.io/component: cluster-scoped-watch
subjects:
  - kind: ServiceAccount
    name: orb
    namespace: orb
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: orb

# ---------------------------------------------------------------------------
# Inbound TokenReview auth  (opt-in via inbound_auth_enabled: true)
# ---------------------------------------------------------------------------
# Required when `inbound_auth_enabled: true` in K8sProviderConfig.
#
# The KubeAuthStrategy validates caller Bearer tokens by submitting them
# to the `authentication.k8s.io/v1 TokenReview` API.  The ORB pod's
# ServiceAccount must be able to create TokenReview objects.
#
# Option A (recommended): bind the standard system:auth-delegator ClusterRole,
# which grants exactly `tokenreviews: create` on authentication.k8s.io.
#
# Option B: create a targeted ClusterRole granting only tokenreviews: create
# (shown below, commented out).
#
# Uncomment ONE of the two options below when inbound_auth_enabled=true.
# Leave both commented out (the default) when inbound_auth_enabled=false.
#
# See docs/root/providers/k8s/auth.md for role-mapping configuration.

# --- Option A: bind system:auth-delegator (recommended) ---
#
# apiVersion: rbac.authorization.k8s.io/v1
# kind: ClusterRoleBinding
# metadata:
#   name: orb-auth-delegator
#   labels:
#     app.kubernetes.io/name: orb
#     app.kubernetes.io/component: inbound-auth
# subjects:
#   - kind: ServiceAccount
#     name: orb
#     namespace: orb
# roleRef:
#   apiGroup: rbac.authorization.k8s.io
#   kind: ClusterRole
#   name: system:auth-delegator

# --- Option B: targeted ClusterRole + ClusterRoleBinding ---
#
# apiVersion: rbac.authorization.k8s.io/v1
# kind: ClusterRole
# metadata:
#   name: orb-tokenreview
#   labels:
#     app.kubernetes.io/name: orb
#     app.kubernetes.io/component: inbound-auth
# rules:
#   - apiGroups: ["authentication.k8s.io"]
#     resources: ["tokenreviews"]
#     verbs: ["create"]
#
# ---
#
# apiVersion: rbac.authorization.k8s.io/v1
# kind: ClusterRoleBinding
# metadata:
#   name: orb-tokenreview
#   labels:
#     app.kubernetes.io/name: orb
#     app.kubernetes.io/component: inbound-auth
# subjects:
#   - kind: ServiceAccount
#     name: orb
#     namespace: orb
# roleRef:
#   apiGroup: rbac.authorization.k8s.io
#   kind: ClusterRole
#   name: orb-tokenreview