什么是RBAC

RBAC全称Role-Based Access Control，是Kubernetes集群基于角色的访问控制，实现授权决策，允许通过Kubernetes API动态配置策略。

什么是Role

Role是一组权限的集合，例如Role可以包含列出Pod权限及列出Deployment权限，Role用于给某个NameSpace中的资源进行鉴权。
通过YAML资源定义清单创建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"]

什么是ClusterRole

ClusterRole是一组权限的集合，但与Role不同的是，ClusterRole可以在包括所有NameSpce和集群级别的资源或非资源类型进行鉴权。
通过YAML资源定义清单创建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"]

相关参数

Role、ClsuterRole Verbs可配置参数
"get", "list", "watch", "create", "update", "patch", "delete", "exec"

Role、ClsuterRole Resource可配置参数
"services", "endpoints", "pods","secrets","configmaps","crontabs","deployments","jobs","nodes","rolebindings","clusterroles","daemonsets","replicasets","statefulsets","horizontalpodautoscalers","replicationcontrollers","cronjobs"

Role、ClsuterRole APIGroup可配置参数
"","apps", "autoscaling", "batch"