一.环境 centos7.x 三台 node1.node2.node3 二.实现免密登陆 2.1.node1上,生成公钥与私钥 [root@node1 ~]# ssh-keygen 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 passphr…