配置keepalived

! Configuration File for keepalived
global_defs { #全局配置
   router_id lb01 #路由id号，不能重复
}
vrrp_instance VI_1 { #定义一个实例
    state MASTER #态参数 master/backup 只是说明，具体根据优先级
    interface enp0s8 #虚IP地址放置的网卡位置
    virtual_router_id 51 #同一个集群id一致
    priority 100 #优先级决定是主还是备    越大越优先
    advert_int 1 #主备通讯时间间隔
    authentication {
        auth_type PASS
        auth_pass 1111 #认证号，集群中要一致
    }
    virtual_ipaddress {
        192.168.2.99 #使用的虚拟ip，要和网段内ip不冲突
    }
}

! Configuration File for keepalived
global_defs {
   router_id lb02 #更改
}
vrrp_instance VI_1 {
    state BACKUP #作为备份
    interface enp0s8
    virtual_router_id 51
    priority 90 #优先级调小
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.2.99
    }
}