背景:
服务器环境:CentOS 6.4 x86_64
一个虚拟IP:
192.168.11.180
两台WEB服务器:
192.168.11.184
192.168.11.185
#安装LVS
yum -y install kernel-devel popt popt-devel libnl libnl-devel popt-static
ln -s /usr/src/kernels/2.6.32-431.20.3.el6.x86_64/ /usr/src/linux
wget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.26.tar.gz
tar zxf ipvsadm-1.26.tar.gz
cd ipvsadm-1.26
make && make install
#安装keeplived
wget http://www.keepalived.org/software/keepalived-1.2.13.tar.gz
tar zxf keepalived-1.2.13.tar.gz
cd keepalived-1.2.13
./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
#192.168.11.184 MASTER配置文件
vim /etc/keepalived/keepalived.conf
global_defs {
notification_email {
hongmingwei@pinganfang.com #email 通知
}
notification_email_from hongmingwei@pinganfang.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS1 # 设置lvs的id,在一个网络内应该是唯一的
}
vrrp_sync_group test { #设置vrrp组
group {
loadbalance
}
}
vrrp_instance loadbalance {
state MASTER #设置lvs的状态,报错MASTER和BACKUP两种,必须大写
interface eth0 #设置对外服务的接口
lvs_sync_daemon_inteface eth0 #设置lvs监听的接口
virtual_router_id 180 #设置虚拟路由表示
priority 180 #设置优先级,数值越大,优先级越高
advert_int 5 #设置同步时间间隔
authentication { #设置验证类型和密码
auth_type PASS
auth_pass 1111
}
virtual_ipaddress { #设置lvs vip
192.168.11.180
}
}
virtual_server 192.168.11.180 80 {
delay_loop 6 #健康检查时间间隔
lb_algo rr #负载均衡调度算法
lb_kind DR #负载均衡转发规则
#persistence_timeout 20 #设置会话保持时间,对bbs等很有用
protocol TCP #协议
real_server 192.168.11.184 80 {
weight 3 #设置权重
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.11.185 80 {
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
#192.168.11.185 BACKUP配置文件:
vim /etc/keepalived/keepalived.conf
global_defs {
notification_email {
hongmingwei@pinganfang.com
}
notification_email_from hongmingwei@pinganfang.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS2
}
vrrp_sync_group test {
group {
loadbalance
}
}
vrrp_instance loadbalance {
state BACKUP
interface eth0
lvs_sync_daemon_inteface eth0
virtual_router_id 180
priority 150
advert_int 5
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.11.180
}
}
virtual_server 192.168.11.180 80 {
delay_loop 6
lb_algo rr
lb_kind DR
#persistence_timeout 20
protocol TCP
real_server 192.168.11.184 80 {
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.11.185 80 {
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
#两个服务器上都添加下面脚本:
vim /etc/init.d/lvs_real
#!/bin/bash
# description: Config realserver lo and apply noarp
SNS_VIP=192.168.11.180
/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
#启动keepalived
/etc/init.d/keepalived start
#启动lvs
/etc/init.d/lvs_real start
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