一、先决条件
环境四台主机 IP 还有 SSH 端口提前准备放行
192.168.70.18 MES01
192.168.70.19 MES02
192.168.74.14 MESDATA01
192.168.74.15 MESDATA02
二、1. 修改hosts信息 root@localhost \~# vi /etc/host
注意：四台主机都要添加
192.168.70.18 node1
192.168.70.19 node2
192.168.71.14 node3
192.168.71.15 node4
三、在四台主机上分别生成秘钥 root@localhost \~# ssh-keygen -t rsa
192.168.70.18
The key fingerprint is:
SHA256:UwXbMELZed1HV0IS1EoCs8qEVaGuMcR/MtCSvhOvayM root@localhost.localdomain
The key's randomart image is:
+---RSA 3072----+
| .oB=++==oo=|
| o ..++*o.o.+|
| . o . o+.. .|
| . o + . . . |
| * + + S |
| ..= + . |
| .o= . |
|E +..+ |
| o+= |
+----SHA256-----+
192.168.70.19
The key fingerprint is:
SHA256:vOBBts4L68kfAouysgZuNkjUDw61ho3CT3VZrGbQznI root@localhost.localdomain
The key's randomart image is:
+---RSA 3072----+
| ....+. |
| o ..o . |
|. * o * . |
|.* B + E |
|o * o O S |
|.o + = o . |
|B . o = . |
|+B . = o |
|B...=.o |
+----SHA256-----+
192.168.71.14
The key fingerprint is:
SHA256:WciF2IYFZx/Xg/HdVsnbbh/45SVZ941ioTYMtU8Ub9Q root@localhost.localdomain
The key's randomart image is:
+---RSA 3072----+
| .*+.o o=. o|
| o+++.oo.E+o|
| .o o+ ..*|
| oo. + o+|
| .S= o ..=+|
| . * o.+.B|
| o + ..+=|
| . .o|
| |
+----SHA256-----+
192.168.71.15
The key fingerprint is:
SHA256:5m93MaIDML/NNrWWBI9kAJa6EvmU2N/HHSpOCOULapg root@localhost.localdomain
The key's randomart image is:
+---RSA 3072----+
| oo |
| .. . . |
| + o + |
| + = o o = . |
| + = *SB O . |
| . E +o= O B o |
| . . .B = + o |
| ..O = . |
| o.= . |
+----SHA256-----+
四、四台linux 主机进行分发秘钥
192.168.70.18 node1
root@localhost \~# ssh-copy-id -i /root/.ssh/id_rsa.pub node2
root@localhost \~# ssh-copy-id -i /root/.ssh/id_rsa.pub node3
root@localhost \~# ssh-copy-id -i /root/.ssh/id_rsa.pub node4
192.168.70.19 node2
root@localhost \~# ssh-copy-id -i /root/.ssh/id_rsa.pub node1
root@localhost \~# ssh-copy-id -i /root/.ssh/id_rsa.pub node3
root@localhost \~# ssh-copy-id -i /root/.ssh/id_rsa.pub node4
192.168.71.14 node3
root@localhost \~# ssh-copy-id -i /root/.ssh/id_rsa.pub node1
root@localhost \~# ssh-copy-id -i /root/.ssh/id_rsa.pub node2
root@localhost \~# ssh-copy-id -i /root/.ssh/id_rsa.pub node4
192.168.71.15 node4
root@localhost \~# ssh-copy-id -i /root/.ssh/id_rsa.pub node1
root@localhost \~# ssh-copy-id -i /root/.ssh/id_rsa.pub node2
root@localhost \~# ssh-copy-id -i /root/.ssh/id_rsa.pub node3
出现这样就代表分配正常
root@localhost \~# ssh-copy-id -i /root/.ssh/id_rsa.pub node4
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
The authenticity of host 'node4 (10.105.70.19)' can't be established.
ED25519 key fingerprint is SHA256:GmU7LMq6+ayFTisN0UlmO6LV/xtkLsZ0GynnmG79Knw.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/fingerprint)? 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@node4's password: -----这里注意需要输入分配放 root 的密码，每个密码不一样
Number of key(s) added: 1
Now try logging into the machine, with: "ssh 'node4'"
and check to make sure that only the key(s) you wanted were added.
五、测试---结果是免输密码就正常了
在 192.168.70.18 MES01 ssh root@192.168.70.19/ 71.14/71.15
在 192.168.70.19 MES02 ssh root@192.168.70.18/ 71.14/71.15
在 192.168.71.14 MESDATA01 ssh root@192.168.70.18/19 /71.15
在 192.168.71.15 MESDATA02 ssh root@192.168.70.18/19 /71.14