3ノードmysqlユーザ相互信頼方法

      mysql  ssh    
       ，      
cd /home/mysql/.ssh

(1)         ：
ssh-keygen -t rsa #         ，    ,       。

(2)  1  
ssh-copy-id -i id_rsa.pub mysql@devdb02
ssh-copy-id -i id_rsa.pub mysql@devdb03

(3)  2  
ssh-copy-id -i id_rsa.pub mysql@devdb01
ssh-copy-id -i id_rsa.pub mysql@devdb03

(4)  3  
ssh-copy-id -i id_rsa.pub mysql@devdb01
ssh-copy-id -i id_rsa.pub mysql@devdb02

#  (    )
ssh devdb01
ssh devdb02
ssh devdb03