启动etcd老是失败，health check for peer 5f2da8650252a065 could not connect: x509: certificate signed by unknown authority (possibly because of "crypto/rsa:..."kubernetes")

Switched to context "default".
● kubelet.service - Kubernetes Kubelet
Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
Active: active (running) since Thu 2017-05-18 15:51:06 CST; 14ms ago
Docs: https://github.com/GoogleCloudPlatform/kubernetes
Main PID: 29521 (kubelet)
Memory: 2.4M
CGroup: /system.slice/kubelet.service
└─29521 /usr/local/bin/kubelet --address=172.16.1.71 --hostname-override=172.16.1.71 --pod-infra-container-image=docker-hub:5000/pause-amd64:3.0 --experimental-bootstrap-kubeconfig=/etc/kubernetes/bootstrap.kubeconfig --kubeconfig=/etc/kubernetes/kubelet.kubeconfig --require-kubeconfig --cert-dir=/etc/kubernetes/ssl --cluster_dns=10.254.0.2 --cluster_domain=cluster.local. --hairpin-mode promiscuous-bridge --cgroup-driver=systemd --allow-privileged=true --serialize-image-pulls=false --logtostderr=true --v=2

May 18 15:51:06 iZuf672rl2jc4gngc8dmvfZ systemd[1]: Started Kubernetes Kubelet.
May 18 15:51:06 iZuf672rl2jc4gngc8dmvfZ systemd[1]: Starting Kubernetes Kubelet...
Cluster "kubernetes" set.
User "kube-proxy" set.
Context "default" set.
Switched to context "default".
● kube-proxy.service - Kubernetes Kube-Proxy Server
Loaded: loaded (/usr/lib/systemd/system/kube-proxy.service; enabled; vendor preset: disabled)
Active: active (running) since Thu 2017-05-18 15:51:06 CST; 18ms ago
Docs: https://github.com/GoogleCloudPlatform/kubernetes
Main PID: 29595 (kube-proxy)
Memory: 3.6M
CGroup: /system.slice/kube-proxy.service
└─29595 /usr/local/bin/kube-proxy --bind-address=172.16.1.71 --hostname-override=172.16.1.71 --cluster-cidr=10.254.0.0/16 --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig --logtostderr=true --v=2

May 18 15:51:06 iZuf672rl2jc4gngc8dmvfZ systemd[1]: Started Kubernetes Kube-Proxy Server.
May 18 15:51:06 iZuf672rl2jc4gngc8dmvfZ systemd[1]: Starting Kubernetes Kube-Proxy Server...
Cluster "kubernetes" set.
User "admin" set.
Context "kubernetes" set.
Switched to context "kubernetes".
# Error from server: etcdserver: request timed out!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

我多次重复安装node时，获取证书认证时貌似出错了，
[root@iZuf672rl2jc4gngc8dmvfZ shell]# kubectl get csr
# NAME AGE REQUESTOR CONDITION
csr-276g3 23s kubelet-bootstrap Pending
csr-5wh7m 3h kubelet-bootstrap Approved,Issued
csr-7h1ch 3h kubelet-bootstrap Approved,Issued
csr-85699 3h kubelet-bootstrap Approved,Issued
csr-d1rfk 3h kubelet-bootstrap Approved,Issued
csr-f3w2g 3h kubelet-bootstrap Approved,Issued
csr-nkd9k 3h kubelet-bootstrap Approved,Issued
csr-nnbg6 2h kubelet-bootstrap Pending
csr-s0nvj 3h kubelet-bootstrap Approved,Issued
csr-sd4bb 1h kubelet-bootstrap Pending
csr-t7xsm 3h kubelet-bootstrap Approved,Issued
csr-txg78 3h kubelet-bootstrap Approved,Issued
csr-x2bjk 54m kubelet-bootstrap Pending
csr-xx3cr 3h kubelet-bootstrap Approved,Issued
csr-z6pl7 11s kubelet-bootstrap Pending

**[root@iZuf672rl2jc4gngc8dmvfZ ~]# kubectl get nodes

No resources found.**