参考
Linux机器之间免密登录设置
1. 配置两台Linux服务器，均为Centos7
master: 192.168.1.89 node: 192.168.1.65
2. master生成ssh密钥
ssh-keygen -t rsa
一路回车
代码语言：javascript复制[root@bogon .ssh]# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:U He9vxeISDtG2nT5EZULBNrQAJtn4b2HUcFX3Gi7bg root@bogon
The key's randomart image is:
---[RSA 2048]----
| .o.oo o* *|
| o.o=.=o|
| ..=oo== .|
| =o=O . |
| S *== . |
| ..o==. .|
| .E o .|
| ..|
| .o|
----[SHA256]----- 3. 查看master生成的公钥私钥
在~/.ssh文件夹下，有id_rsa、id_rsa.pub两个文件
代码语言：javascript复制* id_rsa : 生成的私钥文件 *
* id_rsa.pub ： 生成的公钥文件*4. 复制公钥文件到node服务器上并重命名为authorized_keys
在master上使用 ssh-copy-id 命令
ssh-copy-id -i ~/.ssh/id_rsa.pub 192.168.1.65
5. master首次远程node
代码语言：javascript复制[root@bogon .ssh]# ssh 192.168.1.65
The authenticity of host '192.168.1.65 (192.168.1.65)' can't be established.
ECDSA key fingerprint is SHA256:JHXcH2MD3f7NaTDe0FGeC8liVsJwD LuOSWgjXI9Pzo.
ECDSA key fingerprint is MD5:48:55:78:07:c9:d2:0b:5b:74:cc:e1:71:6e:5e:eb:f1.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.1.65' (ECDSA) to the list of known hosts.
Last login: Tue Aug 4 14:22:50 2020 from 192.168.1.896. master再次远程node的时候可直接登录
代码语言：javascript复制[root@bogon .ssh]# ssh 192.168.1.65
Last login: Tue Aug 4 14:32:40 2020 from 192.168.1.89
