解決k8s報錯No API token found for service account "default", retry after the token is automatically

一、首先生成密鑰： 
openssl genrsa -out /etc/kubernetes/serviceaccount.key 2048

二、編輯/etc/kubenetes/apiserver 
添加如下內容： 
KUBE_API_ARGS="--service_account_key_file=/etc/kubernetes/serviceaccount.key"

三、再編輯/etc/kubernetes/controller-manager 
添加如下內容： 
KUBE_CONTROLLER_MANAGER_ARGS="--service_account_private_key_file=/etc/kubernetes/serviceaccount.key"

最後不管是哪一種解決方式都須要再重啓kubernetes服務： 
systemctl restart etcd kube-apiserver kube-controller-manager kube-scheduler