k8s 1.18.0 部署

wget https://raw.githubusercontent.com/coredns/deployment/master/kubernetes/coredns.yaml.sed
wget https://raw.githubusercontent.com/coredns/deployment/master/kubernetes/deploy.sh
chmod +x deploy.sh
./deploy.sh | kubectl apply -f -


错误：

bootstrap.go:150] No valid private key and/or certificate found, reusing existing private key or creating a new one
F0819 17:46:44.106736 2404782 server.go:274] failed to run Kubelet: cannot create certificate signing request: certificatesigningrequests.certificates.k8s.io is forbidden: U
ser "kubelet-bootstrap" cannot create resource "certificatesigningrequests" in API group "certificates.k8s.io" at the cluster scope
goroutine 1 [running]:

kubectl create clusterrolebinding kubelet-bootstrap  --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap