kubeadm 重置节点后在加入报etcd错误_error execution phase check-etcd: etcd cluster is

1.报错：

在删除节点并kubeadm reset后，执行kubeadm 加入节点时候报错如下错误：

error execution phase check-etcd: etcd cluster is not healthy: failed to dial endpoint https://192.168.123.42:2379 with maintenance client: context deadline exceeded

 2.解决办法：

出现这个报错的原因是之前的etcd集群信息没有清理干净。  

• 执行命令，查看etcd节点列表：

        # kubectl get pod -n kube-system

• 进入etcd-worker-1容器内部：

        # kubectl exec -it etcd-worker-1 -n kube-system -- sh

• k8s中etcd使用的是v3的api，所以要先声明变量：

        # export ETCDCTL_API=3

• 查看当前etcd节点数量：

        # etcdctl --cacert="/etc/kubernetes/pki/etcd/ca.crt" --cert="/etc/kubernetes/pki/etcd/server.crt" --key="/etc/kubernetes/pki/etcd/server.key" member list

• 删除报错的节点：

        # etcdctl --cacert="/etc/kubernetes/pki/etcd/ca.crt" --cert="/etc/kubernetes/pki/etcd/server.crt" --key="/etc/kubernetes/pki/etcd/server.key" member remove e4b7787f9db35781