error execution phase preflight: unable to fetch the kubeadm-config ConfigMap: failed to decode cluster configuration data: no kind “ClusterConfiguration” is registered for version “kubeadm.k8s.io/v1beta2” in scheme “k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/scheme/s cheme.go:31”

kubeadm 执行 join 报如下错误：

error execution phase preflight: unable to fetch the kubeadm-config ConfigMap: failed to decode cluster configuration data: no kind "ClusterConfiguration" is registered for version "kubeadm.k8s.io/v1beta2" in scheme "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/scheme/s
cheme.go:31"

原因：执行 join 的 kubeadm 版本与执行 init 的 kubeadm 版本不匹配，升级 kubeadm 版本即可。