RKE installation kubernetes error

Rke up the implementation of the cluster installation

Given as follows:

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) 

Tip the contents of the error

He said roughly meaning:
1: Centos system can not perform docker command root;
2: SSHD service of not less than version 6.7;

Solution:

Create a user group and add to docker

groupadd docker
useradd rancher -G docker
echo "123456" | passwd --stdin rancher

Or added to an existing account docke a group;

usermod ptmind -G docker 

Note Review:

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