role/rolebinding doesn't support export function

[xilabao]

Is this a request for help? (If yes, you should use our troubleshooting guide and community support channels, see https://kubernetes.io/docs/tasks/debug-application-cluster/troubleshooting/.):

Note: Please file issues for subcomponents under the appropriate repo

Component	Repo
kubectl	kubernetes/kubectl
kubeadm	kubernetes/kubeadm

What keywords did you search in Kubernetes issues before filing this one? (If you have found any duplicates, you should instead reply there.):

---

Is this a BUG REPORT or FEATURE REQUEST? (choose one):BUG REPORT

Kubernetes version (use kubectl version):
Client Version: version.Info{Major:"1", Minor:"8+", GitVersion:"v1.8.0-alpha.0.184+3837d951919006-dirty", GitCommit:"3837d9519190069c44a453c145869e1fced52f23", GitTreeState:"dirty", BuildDate:"2017-06-09T07:04:29Z", GoVersion:"go1.8.1", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"8+", GitVersion:"v1.8.0-alpha.0.184+3837d951919006-dirty", GitCommit:"3837d9519190069c44a453c145869e1fced52f23", GitTreeState:"dirty", BuildDate:"2017-06-09T07:18:31Z", GoVersion:"go1.8.1", Compiler:"gc", Platform:"linux/amd64"}

What happened:

# ./cluster/kubectl.sh get clusterrole admin --export -o yaml
Error from server (BadRequest): export of "clusterroles" is not supported

What you expected to happen:
no error

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know:

ref to #47229

[k8s-github-robot]

@xilabao There are no sig labels on this issue. Please add a sig label by:
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[xilabao]

/sig auth

[fejta-bot]

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[liggitt]

/close

will track in #24855