配置SSH免密登录 设置虚拟IP

无法连接就这样

sudo yum -y remove openssh-server

sudo yum -y install openssh-server

启动

/usr/sbin/sshd

免密登录

ssh-keygen -t rsa

ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.111.201

ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.111.202

ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.111.203

ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.111.204

ssh-keygen

拷贝秘钥到其他所有节点服务器上面

ssh-copy-id -i /root/.ssh/id_rsa '-p 22 root@192.168.111.202 '

ssh 192.168.111.202

给主数据库服务器添加虚拟ip

网卡上增加一个IP：

ifconfig eth1:1 192.168.111.180/24 netmask 255.255.255.0

删除网卡的第二个IP地址:

ip addr del 192.168.111.180 dev eth1