vi admin-sa.yaml

kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: admin
  annotations:
    rbac.authorization.kubernetes.io/autoupdate: "true"
roleRef:
  kind: ClusterRole
  name: cluster-admin
  apiGroup: rbac.authorization.k8s.io
subjects:
- kind: ServiceAccount
  name: admin
  namespace: kube-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: admin
  namespace: kube-system
  labels:
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile

创建admin用户

kubectl create -f admin-sa.yaml 

clusterrolebinding.rbac.authorization.k8s.io/admin created
serviceaccount/admin created

查看admin用户

kubectl get secret -n kube-system|grep admin

admin-token-plkmt                                kubernetes.io/service-account-token   3      82s

获取admin用户token

kubectl describe secret -n kube-system admin-token-plkmt