LVS+KEEPALIVED（2/3）

KEEPALIVED

准备俩台装有HTTP服务的虚拟机

实验前先做一个软链接

ln -s /usr/src/kernels/(uname -r)/  /usr/src/linux

#如果没有/usr/src/kernels/uname -r 路径，很可能是因为缺少kernel-develop-(uname -r) 软件包， 可通过 yum install kernel-devel -y 安装

 编译安装KEEPALIVED

wget http://www.keepalived.org/software/keepalived-1.1.19.tar.gz

tar zxf keepalived-1.1.19.tar.gz

cd keepalived-1.1.19

./configure

make

make install

 

 操作命令

/bin/cp  /usr/local/etc/rc.d/init.d/keepalived /etc/init.d/

/bin/cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig

mkdir /etc/keepalived -p

/bin/cp /usr/local/etc/keepalived/keepalived.conf  /etc/keepalived

/bin/cp /usr/local/sbin/keepalived /usr/sbin

/etc/init.d/keepalived start

ps -ef | grep keep

/etc/init.d/keepalived stop   #成功后，停止keepalived服务

主服务器配置文件 /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {
   notification_email {
   437808591@qq.com #邮件报警
   }
   notification_email_from Alexandre.Cassen@firewall.loc  #指定发件人
   smtp_server 10.0.0.1　　　　#指定smtp服务器地址
   smtp_connect_timeout 30　　#指定smtp连接超时时间
   router_id LVS_7　　　　　　　#负载均衡标识，在局域网内是唯一的
}

vrrp_instance VI_1 {
    state MASTER　　　　　　　　#指定该keepalived节点的初始状态
    interface eth0　　　　　　　#vrrp实例绑定的接口，用于发送VRRP包。
    virtual_router_id 55　　　　#指定VRRP实例ID，范围是0-255
    priority 150　　　　　　　　　#指定优先级，优先级高的将成为MASTER
    advert_int 1　　　　　　　　　　#指定发送VRRP通告的间隔，单位是秒。
    authentication {
        auth_type PASS　　　　　　#指定认证方式。PASS简单密码认证（推荐），AH：IPSEC认证（不推荐）
        auth_pass 1111　　　　　　#指定所使用的密码，最多8位
    }
    virtual_ipaddress {
        10.0.0.10/24
    }
}

备用服务器配置文件 /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {
   notification_email {
   437808591@qq.com
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 10.0.0.1
   smtp_connect_timeout 30
   router_id LVS_2
}

vrrp_instance VI_1 {
    state BACKUP　　　　　　
    interface eth0
    virtual_router_id 55
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        10.0.0.10/24
    }
}

配置完成以后，开启keepalived

　　/etc/init.d/keepalived start

使用客户端ping VIP是通的

然后关闭主服务器的keeplived服务

等待1-2秒，服务会切换到备用服务器上，ping包丢失一次，然后继续发包

这里用 ip a 命令查看服务的切换