kubectl使用过程中突然权限不足

Question

1.开始学习k8s,用了一会之后，权限就开始不足
2.报错信息
Error from server (Forbidden): error when retrieving current configuration of:
&{0xc4200ff080 0xc420238bd0 default nginx-deployment1 nginx.yml 0xc42073f118 false}
from server for: "nginx.yml": deployments.extensions "nginx-deployment1" is forbidden: User "system:node:localhost.localdomain" cannot get deployments.extensions in the namespace "default"
3.总是过半天一天的不好使，不知道为啥