执行 rke up 安装集群
报错如下：
WARN[0000] Failed to set up SSH tunneling for host [172.20.101.167]:
Can't retrieve Docker Info: error during connect: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.24/info: Unable to access the Docker socket (/var/run/docker.sock).
Please check if the configured user can execute `docker ps` on the node, and if the SSH server version is at least version 6.7 or higher.
If you are using RedHat/CentOS, you can't use the user `root`.
Please refer to the documentation for more instructions. Error: ssh: rejected: administratively prohibited (open failed)
报错内容提示
大致意思说：
1：Centos 系统，不能用root 执行docker 命令；
2：Sshd 服务版本不能低于 6.7；
解决办法：
创建用户并且添加到docker组
groupadd docker
useradd rancher -G docker
echo "123456" | passwd --stdin rancher或者将现有的一个账户加入到docke组；
usermod ptmind -G docker 注意修改：
nodes:
- address: 172.20.101.157 #集群节点的地址
user: ptmind #使用哪个用户执行安装命令 <=== 修改用户