when create cluster, node hostname could not be set to purely numeric

[KubeKyrie]

What happened?

When I set node hostname to purely numeric, such as 666, an error occured.

"stderr": "W0307 17:02:39.206901   14325 initconfiguration.go:306] error unmarshaling configuration schema.GroupVersionKind{Group:\"kubeadm.k8s.io\", Version:\"v1beta3\", Kind:\"InitConfiguration\"}: json: cannot unmarshal number into Go struct field NodeRegistrationOptions.nodeRegistration.name of type string\njson: cannot unmarshal number into Go struct field NodeRegistrationOptions.nodeRegistration.name of type string\nTo see the stack trace of this error execute with --v=5 or higher",
    "stderr_lines": [
        "W0307 17:02:39.206901   14325 initconfiguration.go:306] error unmarshaling configuration schema.GroupVersionKind{Group:\"kubeadm.k8s.io\", Version:\"v1beta3\", Kind:\"InitConfiguration\"}: json: cannot unmarshal number into Go struct field NodeRegistrationOptions.nodeRegistration.name of type string",
        "json: cannot unmarshal number into Go struct field NodeRegistrationOptions.nodeRegistration.name of type string",
        "To see the stack trace of this error execute with --v=5 or higher"
    ],

And the InitConfiguration of kubeadm-config.yaml shows below. Name should be string rather than int.

What did you expect to happen?

The cluster could be created successfully.

How can we reproduce it (as minimally and precisely as possible)?

Just set node hostname to purely numeric.

OS

centos 7.9

Version of Ansible

No

Version of Python

Python 2.7.5

Version of Kubespray (commit)

release-2.24

Network plugin used

calico

Full inventory with variables

none

Command used to invoke ansible

none

Output of ansible run

none

Anything else we need to know

No response

[KubeKyrie]

/assign