kubernetes/cmd/kubeadm/app/cmd/util/join.go

var joinCommandTemplate …

// GetJoinWorkerCommand returns the kubeadm join command for a given token and
// Kubernetes cluster (the current cluster in the kubeconfig file)
func GetJoinWorkerCommand(kubeConfigFile, token string, skipTokenPrint bool) (string, error) { … }

// GetJoinControlPlaneCommand returns the kubeadm join command for a given token and
// Kubernetes cluster (the current cluster in the kubeconfig file)
func GetJoinControlPlaneCommand(kubeConfigFile, token, key string, skipTokenPrint, skipCertificateKeyPrint bool) (string, error) { … }

func getJoinCommand(kubeConfigFile, token, key string, controlPlane, skipTokenPrint, skipCertificateKeyPrint bool) (string, error) { … }