配置互信

在配置前需要两台服务器能够通过SSH互相跳转。假设需要同步的两台服务器为节点1与节点2。可以使用如下步骤进行配置。

操作步骤

使用root账号登录节点1

生成公钥私钥

ssh-keygen -t rsa

出现以下信息：

Generating public/private rsa key pair.Enter file in which to save the key (/home/deven/.ssh/id_rsa): (回车)
Enter passphrase (empty for no passphrase): (回车)
Enter same passphrase again:(回车) 
Your identification has been saved in /home/deven/.ssh/id_rsa.
Your public key has been saved in /home/deven/.ssh/id_rsa.pub.
The key fingerprint is:89:56:d6:4a:b2:6c:4a:05:............

中间过程直接3个回车。在/root/.ssh/目录下，生成了两个文件：id_rsa 和 id_rsa.pub

将id_rsa.pub信息写入到authorized-keys中。
cat /root/.ssh/id_rsa.pub >> /root/.ssh/authorized_keys
修改id_rsa权限。
chmod 600 /root/.ssh/id_rsa
将anthorized-keys和id_rsa复制到节点2。
scp /root/.ssh/authorized_keys 节点2的IP地址:/root/.ssh/

输入命令后会有回显询问是否需要连接，输入“yes”之后，再输入节点2的密码，即可将文件复制到节点2。

scp /root/.ssh/id_rsa 节点2的IP地址:/root/.ssh/
验证跳转是否成功。