對于一些企業，我們不用花費大把的資金去購進負載均衡設備，也可以進行負載均衡的實現。現在我們來說一下nginx負載均衡器，這種適合于中小型企業的設備，同樣可以達到負載平衡的效果，現在我們就來介紹一下nginx負載均衡器的相關安裝和設置問題。

一､拓撲環境:

用途 IP

主nginx負載均衡器 192.168.0.154

輔nginx負載均衡器 192.168.0.155

VIP地址 192.168.0.188
 
二､安裝keepalived

wget http://www.keepalived.org/software/keepalived-1.1.15.tar.gz  
tar zxvf keepalived-1.1.15.tar.gz  
cd keepalived-1.1.15  
./configure --prefix=/usr/local/keepalived  
make   
make install  
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/  
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/  
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/  
mkdir /etc/keepalived  
cd /etc/keepalived/  
 
vim keepalived.conf  
! Configuration File for keepalived  
global_defs {  
 notification_email {  
 yuhongchun027@163.com  
 }  
 notification_email_from keepalived@chtopnet.com  
 smtp_server 127.0.0.1  
 smtp_connect_timeout 30  
 router_id LVS_DEVEL  
}  
vrrp_instance VI_1 {  
state MASTER  
interface eth0  
virtual_router_id 51  
mcast_src_ip 192.168.0.154<==主nginx負載均衡器的IP地址  
priority 100  
advert_int 1  
authentication {  
 auth_type PASS  
 auth_pass chtopnet  
}  
virtual_ipaddress {  
 192.168.0.188<==vip地址  
}  
}  
#service keepalived start 

主nginx負載均衡器日志:

[root@ltos ~]# tail /var/log/messages  
Oct 6 03:25:03 ltos avahi-daemon[2306]: Registering new address record for 192.168.0.188 on eth0.  
Oct 6 03:25:03 ltos avahi-daemon[2306]: Registering new address record for 192.168.0.154 on eth0.  
Oct 6 03:25:03 ltos avahi-daemon[2306]: Registering HINFO record with values 'I686'/'LINUX'.  
Oct 6 03:25:23 ltos avahi-daemon[2306]: Withdrawing address record for fe80::20c:29ff:feb9:eeab on eth0.  
Oct 6 03:25:23 ltos avahi-daemon[2306]: Withdrawing address record for 192.168.0.154 on eth0.  
Oct 6 03:25:23 ltos avahi-daemon[2306]: Host name conflict, retrying with <ltos-31> 
Oct 6 03:25:23 ltos avahi-daemon[2306]: Registering new address record for fe80::20c:29ff:feb9:eeab on eth0.  
Oct 6 03:25:23 ltos avahi-daemon[2306]: Registering new address record for 192.168.0.188 on eth0.  
Oct 6 03:25:23 ltos avahi-daemon[2306]: Registering new address record for 192.168.0.154 on eth0.  
Oct 6 03:25:23 ltos avahi-daemon[2306]: Registering HINFO record with values 'I686'/'LINUX'.