一，环境配置
VIP：192.168.222.222
RIP：192.168.222.134
RIP：192.168.222.135
DR_MASTER：192.168.222.128
DR_SLAVE：192.168.222.129
二，DR配置
1，安装软件
yum install epel-release -y
yum install ipvsadm -y
yum install keepalived -y
2，keepalived配置
MASTER上面配置：
#vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL1 #运行keepalived的机器的一个标识
}
vrrp_instance VI_1 {
state MASTER
interface eth0 #实例绑定的网卡
virtual_router_id 51 #VRID 标记 (0-255)主备服务器必须一致
priority 100 #优先级
advert_int 1 #检查间隔，默认为1秒
authentication {
auth_type PASS #认证方式 PASS
auth_pass 1111 #认证密码
}
virtual_ipaddress {
192.168.222.222 # VIP 地址
}
}
virtual_server 192.168.222.222 80 {
delay_loop 3 #每3秒查询realserver状态
lb_algo wrr
lb_kind DR
# persistence_timeout 50 #会话保持时间，就是同一个ip在50秒内会被分到同一个realserver上
protocol TCP #使用TCP 协议来检查
real_server 192.168.222.134 80 { #配置Real Server，需要指定真实IP与其端口号，两者用空格隔开
weight 3
TCP_CHECK { #以什么方式来检查健康状况 HTTP_GET|SSL_GET|TCP_CHECK|SMTP_CHECK|MISC_CHECK
connect_timeout 3 #连接超时时间
nb_get_retry 3 #重试连接次数
delay_before_retry 3 #每次重试连接间隔（单位秒）
connect_port 80
}
}
real_server 192.168.222.135 80 {
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
SLAVE不同配置如下其它项相同：
#vim /etc/keepalived/keepalived.conf
router_id LVS_DEVEL2
state SLAVE
priority 150
3，启动服务
/etc/init.d/keepalived start
三，realserver配置
1，vim realserver.sh
#!/bin/bash
SNS_VIP=192.168.222.222
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
2，启动
/etc/init.d/httpd start
./realserver.sh start
附注：以上是lvs+keepalived的配置，以下是不需要keepalived，无高可用单lvs的简单配置，其lvs_dr.sh如下:
#!/bin/bash
#website director vip.
SNS_VIP=192.168.222.222
SNS_RIP1=192.168.222.135
SNS_RIP2=192.168.222.134
# ./etc/rc.d/init.d/functions
case "$1" in
start)
# set squid vip
/sbin/ipvsadm --set 30 5 60
/sbin/ifconfig eth0:0 $SNS_VIP broadcast $SNS_VIP netmask 255.255.255.255 up
/sbin/ipvsadm -C
/sbin/ipvsadm -A -t $SNS_VIP:80 -s rr
/sbin/ipvsadm -a -t $SNS_VIP:80 -r $SNS_RIP1:80
/sbin/ipvsadm -a -t $SNS_VIP:80 -r $SNS_RIP2:80
touch /var/lock/subsys/ipvsadm >/dev/null 2>&1
echo "ipvsadm started"
;;
stop)
/sbin/ipvsadm -C
/sbin/ipvsadm -Z
ifconfig eth0:0 down
rm -f /var/lock/subsys/ipvsadm >/dev/null 2>&1
echo "ipvsadm stoped"
;;
status)
if [ ! -e /var/lock/subsys/ipvsadm ];then
echo "ipvsadm stoped"
exit 1
else
echo "ipvsadm OK"
fi
;;
*)
echo "Usage: $0 {start|stop|status}"
exit 1
esac
exit 0