1:控制节点一键生成ssh文件

ssh-keygen -q -N “” -f ~/.ssh/id_rsa

[root@docker-node1 ~]# ssh-keygen -q -N “” -f ~/.ssh/id_rsa
[root@docker-node1 ~]#

2:控制节点使用ssh-copy-id命令分发key分件

[root@docker-node1 ~]# ssh-copy-id 192.168.31.131
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: “/root/.ssh/id_rsa.pub”
The authenticity of host ‘192.168.31.131 (192.168.31.131)’ can’t be established.
ECDSA key fingerprint is SHA256:0hx8z8R/wghSvHI10b8dz5BVNyOaWQF1yNarxCwPrcs.
ECDSA key fingerprint is MD5:6f:64:3d:ad:8f:12:0e:cd:57:5b:bc:42:45:af:d4:83.
Are you sure you want to continue connecting (yes/no)? yes
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed — if you are prompted now it is to install the new keys
root@192.168.31.131’s password:
Number of key(s) added: 1
Now try logging into the machine, with: “ssh ‘192.168.31.131’”
and check to make sure that only the key(s) you wanted were added.
[root@docker-node1 ~]#

3:检查登陆

[root@docker-node1 ~]# ssh 192.168.31.131
Last login: Tue Feb 25 18:09:08 2020 from liwm.lan
[root@docker-node2 ~]#