LVS(Linux Virtual Server)负载均衡(VS/DR)

LVS(Linux Virtual Server)负载均衡(VS/DR)

准备工作:

主机类型	IP
LVS	192.168.0.6
web1	192.168.0.11
web2	192.168.0.12
VIP	192.168.0.100

LVS

# cd /etc/sysconfig/network-scripts/
# cp ifcfg-eth0 ifcfg-eth0:0

DEVICE=eth0:0
ONBOOT=yes
IPADDR=192.168.0.100
NETMASK=255.255.255.0

# ifup eth0:0

安装ipvsadm工具

# yum -y install ipvsadm

配置LVS转发

# ipvsadm -A -t 192.168.0.100:80 -s rr
# ipvsadm -a -t 192.168.0.100:80 -r 192.168.0.11:80 -g -w 1
# ipvsadm -a -t 192.168.0.100:80 -r 192.168.0.12:80 -g -w 1
# service ipvsadm save

---

WebServer

开启apache

# service httpd start

添加网卡

# vim /etc/sysconfig/network-scripts/ifcfg-lo:0

DEVICE=lo:0
ONBOOT=yes 
IPADDR=192.168.0.100
NETMASK=255.255.255.255

开启网卡并设置路由开机启动

# ifup lo:0
# vim /etc/rc.local

/sbin/route add -host 192.168.0.100 dev lo:0

配置路由并修改内核

# route add -host 192.168.0.100 dev lo:0
# vim /etc/sysctl.conf

net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.default.arp_ignore = 1
net.ipv4.conf.default.arp_announce = 2
net.ipv4.conf.lo.arp_ignore = 1
net.ipv4.conf.lo.arp_announce = 2

刷新配置

# sysctl -p

测试

浏览器访问192.168.0.100, 在web服务器中轮循即测试成功