lvs直接路由模式简单部署

环境：
负载均衡服务器:192.168.137.177,192.168.137.178
VIP:192.168.137.176
真实服务器：192.168.137.179,192.168.137.180

一、安装相关模块
yum install ipvsadm
运行ipvsadm命令
查看内核是否加载ip_vs模块
lsmod|grep ip_vs
[root@lvs ~]# lsmod |grep ip_vs
ip_vs                 108205  0

二、在负载均衡服务器上安装keepalived
wget http://www.keepalived.org/software/keepalived-1.1.17.tar.gz
tar zxvf keepalived-1.1.17.tar.gz
cd keepalived-1.1.17
./configure --prefix=/usr/local/keepalived

配置master /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {
     router_id LVS_MASTER
}

vrrp_sync_group VGM {
     group {
                VI_1
  }
}

vrrp_instance VI_1 {
        state MASTER
        interface eth0
        lvs_sync_daemon_inteface eth0
        virtual_router_id 51
        priority 180
        advert_int 5
        authentication {
                auth_type PASS
                auth_pass 1111
        }
        virtual_ipaddress {
  192.168.137.176
        }
}

virtual_server 192.168.137.176 80 {
        delay_loop 6
        lb_algo wlc
        lb_kind DR
        persistence_timeout 20
        protocol TCP

        real_server 192.168.137.179 80 {
                weight 100
  TCP_CHECK {
                        connect_timeout 3
                        nb_get_retry 3
                        delay_before_retry 3
         connect_port 80
                }
        }

        real_server 192.168.137.180 80 {
                weight 100
                TCP_CHECK {
                        connect_timeout 10
                        nb_get_retry 3
                        delay_before_retry 3
                        connect_port 80
                }
        }
        
}

配置backup /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {
     router_id LVS_SLAVE
}

vrrp_sync_group VGM {
        group {
        VI_1
     }
}

vrrp_instance VI_1 {
        state BACKUP
        interface eth0
        lvs_sync_daemon_inteface eth0
        virtual_router_id 51
        priority 150
        advert_int 5
        authentication {
                auth_type PASS
                auth_pass 1111
        }
        virtual_ipaddress {
  192.168.137.176
        }
}

virtual_server 192.168.137.176 80 {
        delay_loop 6
        lb_algo wlc
        lb_kind DR
        persistence_timeout 20
        protocol TCP

        real_server 192.168.137.179 80 {
                weight 100
  TCP_CHECK {
                        connect_timeout 3
                        nb_get_retry 3
                        delay_before_retry 3
         connect_port 80
                }
        }

        real_server 192.168.137.180 80 {
                weight 100
                TCP_CHECK {
                        connect_timeout 10
                        nb_get_retry 3
                        delay_before_retry 3
                        connect_port 80
                }
        }
        
}

启动keepalived

/usr/local/keepalived/sbin/keepalived -D

三、在每台真实服务器上启动配置文件/usr/loal/bin/lvs_real
如下

#!/bin/bash

#description : start realserver

VIP=192.168.137.176

/etc/rc.d/init.d/functions



case "$1" in

start)

echo " start LVS of REALServer"

/sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up

echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore

echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce

echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore

echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce

;;

stop)

/sbin/ifconfig lo:0 down

echo "close LVS Directorserver"

echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore

echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce

echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore

echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce

;;

*)

echo "Usage: $0 {start|stop}"

exit 1

esac

chmod 755 /usr/loal/bin/lvs_real

在每台真实服务器上启动

/usr/loal/bin/lvs_real

至此，简单部署LVS完成。