CreateJoinControlPlaneKubeConfigFiles will create and write to disk the kubeconfig files required by kubeadm join --control-plane workflow, plus the admin kubeconfig file used by the administrator and kubeadm itself; the kubelet.conf file must not be created because it will be created and signed by the kubelet TLS bootstrap process. If any kubeconfig files already exists, it used only if evaluated equal; otherwise an error is returned.
func CreateKubeConfigFile(kubeConfigFileName string, outDir string, cfg *kubeadmapi.InitConfiguration) error
CreateKubeConfigFile creates a kubeconfig file. If the kubeconfig file already exists, it is used only if evaluated equal; otherwise an error is returned.
ValidateKubeconfigsForExternalCA check if the kubeconfig file exist and has the expected CA and server URL using kubeadmapi.InitConfiguration.
func WriteKubeConfigWithClientCert(out io.Writer, cfg *kubeadmapi.InitConfiguration, clientName string, organizations string) error
WriteKubeConfigWithClientCert writes a kubeconfig file - with a client certificate as authentication info - to the given writer.
func WriteKubeConfigWithToken(out io.Writer, cfg *kubeadmapi.InitConfiguration, clientName, token string) error
WriteKubeConfigWithToken writes a kubeconfig file - with a token as client authentication info - to the given writer.