Kubernetes - 7.1 RBAC - Role and ClusterRole

什麼是RBAC

RBAC全稱Role-Based Access Control，是Kubernetes叢集基于角色的通路控制，實作授權決策，允許通過Kubernetes API動态配置政策。

什麼是Role

Role是一組權限的集合，例如Role可以包含列出Pod權限及列出Deployment權限，Role用于給某個NameSpace中的資源進行鑒權。

通過YAML資源定義清單建立Role

kubectl apply -f pod-role.yaml

apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  namespace: default
  name: pod-role
rules:
- apiGroups: [""]
  resources: ["pods"]
  verbs: ["get", "watch", "list"]           

什麼是ClusterRole

ClusterRole是一組權限的集合，但與Role不同的是，ClusterRole可以在包括所有NameSpce和叢集級别的資源或非資源類型進行鑒權。

通過YAML資源定義清單建立ClusterRole

kubectl apply -f pod-clusterrole.yaml

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: pod-clusterrole
rules:
- apiGroups: [""]
  resources: ["pods"]
  verbs: ["get", "watch", "list"]           

相關參數

Role、ClsuterRole Verbs可配置參數

"get", "list", "watch", "create", "update", "patch", "delete", "exec"

Role、ClsuterRole Resource可配置參數

"services", "endpoints", "pods","secrets","configmaps","crontabs","deployments","jobs","nodes","rolebindings","clusterroles","daemonsets","replicasets","statefulsets","horizontalpodautoscalers","replicationcontrollers","cronjobs"

Role、ClsuterRole APIGroup可配置參數

"","apps", "autoscaling", "batch"