register: metadata.name: Invalid value

[Zelpher]

Hi,

Using your example lead to this error when k3s try to register nodes :

Feb 10 09:18:24 ip-xx-xx-xx-xx k3s[7199]: E0210 09:18:24.566878    7199 kubelet_node_status.go:93] Unable to register node "server_one" with API server: Node "server_one" is invalid: metadata.name: Invalid value: "server_one": a DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')

Is it possible to add assertion, or at least update your usage example ?

Thanks,