lvs+keepalived实现负载均衡,基于centos6.5

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1.RS服务器增加虚拟IP
# SNS_VIP 为要绑定的虚拟IP
vi /et/init.d/realserver #增加以下内容保存修改权限为750 或755
说明: 以下内容 chkconfig : 2345 description 这两行必须要有否则 chkconfig --add 增加到系统服务会失败
以下脚本在centos6.5测试正常.
#!/bin/bash
# chkconfig: 2345 30 70
# description: Starts and Stops VIP.
SNS_VIP=192.168.200.201
. /etc/rc.d/init.d/functions
case "$1" in
start)
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)
ifconfig lo:0 down
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

# 执行以下脚本将 realserver 增加到系统服务
chkconfig --add realserver
#设置自启动
chkconfig realserver on

2.RS开启HTTPD
yum install httpd
service httpd start #默认wwwroot /var/www/
chkconfig httd on #自启动

3.负载均衡主机
yum install ipvsadm #LVS linux虚拟服务的一个控制命令工具
yum install keepalived #

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