keepalived双机热备

keepalived热备份（双机热备）
主keepalived服务器:192.168.80.105 
备keepalived服务器:192.168.80.104

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在80.105做主服务器：
systemctl stop firewalld        //关闭防火墙
setenforce 0               //关闭监控

yum install keepalived -y    //keepalived软件安装

vi /etc/keepalived/keepalived.conf     //进入keepalived服务主配置文件
删除所有内容，添加以下内容：

主负载均衡服务器配置
! Configuration File for keepalived

global_defs {     //全局配置
   router_id lb01     //调度器的名称
}

vrrp_instance VI_1 {    //定义实例
    state MASTER    //状态参数
    interface ens32    //虚拟IP地址放置的网卡位置
    virtual_router_id 51     //集群id
    priority 150       //优先级
    advert_int 1     //主备通讯时间间隔
    authentication {      //认证设置
        auth_type PASS   //密码认证
        auth_pass 1111   
    }
    virtual_ipaddress {    //虚拟IP地址
        192.168.80.188
    }
}

systemctl start keepalived     //启动keepalived
systemctl status keepalived    //查看keepalived状态

ip addr show ens32    //查看ens32网卡ip地址

cat /var/log/messages   //查看日志

在80.104做备服务器
systemctl stop firewalld
setenforce 0

yum install keepalived -y    //keepalived软件安装

vi /etc/keepalived/keepalived.conf     //进入keepalived服务主配置文件
删除所有内容，添加以下内容：

备负载均衡服务器配置
! Configuration File for keepalived

global_defs {     //全局配置
   router_id lb02     //调度器的名称
}

vrrp_instance VI_1 {    //定义实例
    state BACKUP       //状态参数
    interface ens32      //虚拟IP地址放置的网卡位置
    virtual_router_id 51    //集群id
    priority 100         //优先级
    advert_int 1        //主备通讯时间间隔
    authentication {       //认证设置
        auth_type PASS   //密码认证
        auth_pass 1111
    }
    virtual_ipaddress {   //虚拟IP地址
     192.168.80.188
    }
}

systemctl start keepalived    //启动keepalived
ip addr show ens32    //查看ens32网卡ip地址

cat /var/log/messages   //查看日志

把主服务器的虚拟机关闭：systemctl stop keepalived
在备服务器输入：ip addr show ens32  就能显示