1、安装keepalived（10.0.0.5/10.0.0.6）
yum install keepalived -y
rpm -qa keepalived
#keepalived-1.3.5-8.el7_6.x86_64
ls /etc/keepalived/keepalived.conf
2、配置主（10.0.0.5）
[root@lb01 keepalived]# cat keepalived.conf
global_defs {
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.0.0.3/24 dev eth0 label eth0:1
}
}
3、配置备（10.0.0.6）
[root@lb02 ~]# cat /etc/keepalived/keepalived.conf
global_defs {
router_id LVS_BACKUP
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 50
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.0.0.3/24 dev eth0 label eth0:1
}
}
主备区别：3点
router_id
state
priority
4、分别启动主备
systemctl start keepalived
[root@lb01 keepalived]# ps -ef|grep keep|grep -v grep
root 8613 1 0 20:58 ? 00:00:00 /usr/sbin/keepalived -D
root 8614 8613 0 20:58 ? 00:00:00 /usr/sbin/keepalived -D
root 8615 8613 0 20:58 ? 00:00:00 /usr/sbin/keepalived -D
5、测试
停掉主的keepalived，看备节点是否接管
恢复主的keepalived，看备节点是否释放
6、出错了 看日志
cat /var/log/messages
