构建百万访问量电子商务网站之LVS负载均衡(前端四层负载均衡器)[连载之电子商务系统架构]

ln -s /usr/src/kernels/2.6.x-xx.EL-i686/ /usr/src/linux 
cd ipvsadm-1.24 
make && make install

[root@localhost ipvsadm-1.24]# ipvsadm -v 
ipvsadm v1.24 2005/12/10 (compiled with popt and IPVS v1.2.0)

./configure --with-kernel-dir=/kernel/path 
Keepalived configuration 
------------------------ 
Keepalived version             : 1.1.17 
Compiler                                 : gcc 
Compiler flags                     : -g -O2 
Extra Lib                                : -lpopt -lssl -lcrypto    
Use IPVS Framework             : Yes 
IPVS sync daemon support : Yes 
Use VRRP Framework             : Yes 
Use LinkWatch                        : No 
Use Debug flags                    : No

echo “======================= 配置keepalived ===========================” 
#Funciont: Backup website and mysql database 
#Author: Jimmy Li 
#Website: http://jimmyli.blog.51cto.com/ 
#IMPORTANT!!!Please Setting the following Values! 
[root@master ~]#    cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/ 
[root@master ~]#    cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/ 
[root@master ~]#    mkdir /etc/keepalived 
[root@master ~]#    cp /usr/local/sbin/keepalived /usr/sbin/ 
[root@master ~]# vi /etc/keepalived/keepalived.conf 
! Configuration File for keepalived 
    
global_defs { 
     notification_email { 
            jimmyli@jimmyli.blog.51cto.com 
     } 
     notification_email_from jimmyli@jimmyli.blog.51cto.com    #http://jimmyli.blog.51cto.com/ 
     smtp_server jimmyli.blog.51cto.com 
    # smtp_connect_timeout 30 
     router_id LVS_DEVEL 
} 
    
# VIP1 
vrrp_instance VI_1 { 
        state MASTER                         #备份服务器上将MASTER改为BACKUP        
        interface eth0 
        lvs_sync_daemon_inteface eth0 
        virtual_router_id 51 
        priority 100        # 备份服务上将100改为90 
        advert_int 5 
        authentication { 
                auth_type PASS 
                auth_pass 1111 
        } 
        virtual_ipaddress { 
                192.168.9.200        
                #(如果有多个VIP，继续换行填写.) 
        } 
} 
    
virtual_server 192.168.9.200 80 { 
        delay_loop 6                                    #(每隔6秒查询realserver状态) 
        lb_algo wlc                                    #(lvs 算法) 
        lb_kind DR                                    #(Direct Route) 
        persistence_timeout 60                #(同一IP的连接60秒内被分配到同一台realserver) 
        protocol TCP                                #(用TCP协议检查realserver状态) 
    
        real_server 192.168.9.203 80 { 
                weight 100                             #(权重) 
                TCP_CHECK { 
                connect_timeout 10             #(10秒无响应超时) 
                nb_get_retry 3 
                delay_before_retry 3 
                connect_port 80 
                } 
        } 
        real_server 192.168.9.204 80 { 
                weight 100 
                TCP_CHECK { 
                connect_timeout 10 
                nb_get_retry 3 
                delay_before_retry 3 
                connect_port 80 
                } 
         } 
} 
[root@master ~]#    service keepalived start|stop 
[root@master ~]# chkconfig –level 2345 keepalived on 
echo “====================== 配置realserver =========================” 
#Funciont: Backup website and mysql database 
#Author: Jimmy Li 
#Website: http://jimmyli.blog.51cto.com/ 
#IMPORTANT!!!Please Setting the following Values! 
[root@web_1 ~]# vi /root/lvs_real.sh 
#!/bin/bash 
#http://jimmyli.blog.51cto.com/ 
#Config realserver 
SNS_VIP=192.168.9.200 
    
/etc/rc.d/init.d/functions 
    
case "$1" in 
start) 
             /sbin/ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP 
             /sbin/route add -host $SNS_VIP dev lo:0 
             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 
             sysctl -p >/dev/null 2>&1 
             echo "RealServer Start OK" 
    
             ;; 
stop) 
             /sbin/ifconfig lo:0 down 
             /sbin/route del $SNS_VIP >/dev/null 2>&1 
             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 "RealServer Stoped" 
             ;; 
*) 
             echo "Usage: $0 {start|stop}" 
             exit 1 
esac 
    
exit 0 
[root@web_1 ~]# chmod +x /roo/lvs_real.sh 
[root@web_1 ~]# /root/lvs_real.sh start 
[root@web_1 ~]# ifconfig 
    
[root@web_1 ~]# echo “/root/lvs_real.sh start” >> /etc/rc.local

echo “===================== 测试LVS+keepalived ========================” 
#LVS_master、LVS_backup上开启keepalived，LVS_master先绑定VIP 
#http://jimmyli.blog.51cto.com/ 
LVS_master： 
    
LVS_backup：