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

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

2、编辑/etc/kubenetes/apiserver 
添加以下内容： 
KUBE_API_ARGS="--service_account_key_file=/etc/kubernetes/serviceaccount.key"

3、再编辑/etc/kubernetes/controller-manager 
添加以下内容： 
KUBE_CONTROLLER_MANAGER_ARGS="--service_account_private_key_file=/etc/kubernetes/serviceaccount.key"

最后无论是哪种解决方式都需要再重启kubernetes服务： 
systemctl restart etcd kube-apiserver kube-controller-manager kube-scheduler

来源：https://my.oschina.net/u/3852748/blog/3131662