在作集群的时候是须要SSH互信的，另外也利于在另外一节点操做方便node
1.在Node1中生成公钥和私钥对bash
[root@Node1~]# ssh-keygen -t rsa Generatingpublic/private rsa key pair. Enterfile in which to save the key (/root/.ssh/id_rsa): 回车 Enterpassphrase (empty for no passphrase): 回车 Entersame passphrase again: 回车 Youridentification has been saved in /root/.ssh/id_rsa. Yourpublic key has been saved in /root/.ssh/id_rsa.pub.
这期间一直按回车便可，这样公钥/私钥对就建立完毕ssh
2.在Node2上建立.ssh目录并设置权限ide
[root@Node2~]# mkdir /root/.ssh/ [root@Node2~]# chmod 700 .ssh/
3.将公钥传送到Node2上，这样在Node1上就能够免密码登陆Node2了spa
[root@Node1~]# scp .ssh/id_rsa.pub Node2:.ssh/authorized_keys root@Node2'spassword: 输入Node2（192.168.100.223）的root密码 id_rsa.pub 100% 392 0.4KB/s 00:00
或者也能够直接使用
xml
[root@node1 ~]# ssh-copy-id -i .ssh/id_rsa.pub root@node2
如今咱们已经能够在Node1上免密码登陆Node2了it
若是出现io
[root@Node2 .ssh]# ssh -copy -id -i id_rsa.pub root@Node1 -bash: ssh: command not found 或 [root@Node2 .ssh]# scp id_rsa.pub Node1:.ssh/authorized_keys -bash: scp: command not found
则是说明未安装openssh-clients
class
执行集群
yum -y install openssh-clients
这时最好在Node2上执行：
[root@node2 ~]# touch /root/.ssh/authorized_keys2 (若是已经存在这个文件, 跳过这条) [root@node2 ~]# cat /root/.ssh/authorized_keys >> /root/.ssh/authorized_keys2 (将authorized_keys的内容追加到 authorized_keys2 中)
这里在Node2上新建authorized_keys2文件，并将authorized_keys文件追加到authorized_keys2文件里是为了若是须要在多台机器上进行互信，则可能会将authorized_keys文件覆盖，如今直接将全部公钥都放在一个文件里头
另外再在Node2上也生成公钥和私钥对，将公钥传至Node1上