What is Kubernetes RBAC?

Question

Accepted Answer

**RBAC** — Role-Based Access Control for Kubernetes authorization.

```yaml
# Role — namespace-scoped permissions
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: pod-reader
  namespace: production
rules:
- apiGroups: [""]
  resources: ["pods"]
  verbs: ["get", "list", "watch"]
---
# RoleBinding — assign role to user/group
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: read-pods
  namespace: production
subjects:
- kind: User
  name: jane@example.com
  apiGroup: rbac.authorization.k8s.io
roleRef:
  kind: Role
  name: pod-reader
  apiGroup: rbac.authorization.k8s.io
---
# ClusterRole — cluster-scoped
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: node-reader
rules:
- apiGroups: [""]
  resources: ["nodes"]
  verbs: ["get", "list", "watch"]
```

**Components:**
- Role/ClusterRole: permissions.
- RoleBinding/ClusterRoleBinding: assignments.

DevOps: What is Kubernetes RBAC?