HAProxy双机高可用方案之HAProxy+Keepalived
环境:centos 5.4 x64
软件版本:haproxy-1.3.26.tar.gz 、keepalived-1.2.7.tar.gz
网络拓扑:
192.168.48.143
+-----------VIP----------+
| eth1 |
| |
Master Backup
192.168.48.139 192.168.48.140
+----------+ +----------+
| HAProxy | eth0 | HAProxy |
|keepalived|-------------|keepalived|
+----------+1.139 1.140+----------+
|
v
+--------+
| |
| |
v v eth1
+------+ +------+
| WEB1 | | WEB2 |
+------+ +------+
48.141 48.142
haproxy安装
主页:http://haproxy.1wt.eu/
下载地址:http://haproxy.1wt.eu/download/1.3/src/haproxy-1.3.26.tar.gz
[root@localhost tools]# wget http://haproxy.1wt.eu/download/1.3/src/haproxy-1.3.26.tar.gz
[root@localhost tools]# tar zxf haproxy-1.3.26.tar.gz
[root@localhost tools]# cd haproxy-1.3.26
[root@localhost haproxy-1.3.26]# make TARGET=linux26 PREFIX=/usr/local/haproxy
[root@localhost haproxy-1.3.26]# make install PREFIX=/usr/local/haproxy
[root@localhost haproxy-1.3.26]# cd /usr/local/haproxy/
[root@localhost haproxy]# mkdir conf
主备配置一样
[root@localhost haproxy]# cat haproxy.cfg
global
log 127.0.0.1 local0
maxconn 65535
chroot /usr/local/haproxy
uid 99
gid 99
daemon
nbproc 2
#pidfile /usr/local/haproxy/haproxy.pid
debug
defaults
log 127.0.0.1 local3
mode http
option httplog
option httpclose
option dontlognull
option forwardfor
option redispatch
retries 2
maxconn 2000
# balance roundrobin
# stats uri /haproxy-stats
contimeout 5000
clitimeout 50000
srvtimeout 50000
frontend web_proxy
bind *:80
mode http
option httplog
log global
default_backend phppool
backend phppool
mode http
balance source
option httpchk HEAD /
server web1 192.168.48.141:80 check inter 2000
server web2 192.168.48.142:80 check inter 2000
listen web_ha
bind 0.0.0.0:8080
mode http
stats uri /haproxy-stats
stats hide-version
# stats realm Haproxy\statistics
stats auth gao:gao # 用户名/密码
haproxy启动脚本
[root@ha139 sbin]# cat haproxy.sh
#!/bin/sh
# chkconfig 35 on
# description: HAProxy is a TCP/HTTP reverse proxy which is particularly suited for high availability environments.
# Source function library.
if [ -f /etc/init.d/functions ]; then
. /etc/init.d/functions
elif [ -f /etc/rc.d/init.d/functions ] ; then
. /etc/rc.d/init.d/functions
else
exit 0
fi
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0
[ -f /usr/local/haproxy/conf/haproxy.cfg ] || exit 1
RETVAL=0
start() {
/usr/local/haproxy/sbin/haproxy -c -q -f /usr/local/haproxy/conf/haproxy.cfg
if [ $? -ne 0 ]; then
echo "Errors found in configuration file."
return 1
fi
echo -n "Starting HAproxy: "
daemon /usr/local/haproxy/sbin/haproxy -D -f /usr/local/haproxy/conf/haproxy.cfg -p /var/run/haproxy.pid
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/haproxy
return $RETVAL
}
stop() {
echo -n "Shutting down HAproxy: "
killproc haproxy -USR1
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/haproxy
[ $RETVAL -eq 0 ] && rm -f /var/run/haproxy.pid
return $RETVAL
}
restart() {
/usr/local/haproxy/sbin/haproxy -c -q -f /usr/local/haproxy/conf/haproxy.cfg
if [ $? -ne 0 ]; then
echo "Errors found in configuration file, check it with 'haproxy check'."
return 1
fi
stop
start
}
check() {
/usr/local/haproxy/sbin/haproxy -c -q -V -f /usr/local/haproxy/conf/haproxy.cfg
}
rhstatus() {
status haproxy
}
condrestart() {
[ -e /var/lock/subsys/haproxy ] && restart || :
}
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
restart
;;
reload)
restart
;;
condrestart)
condrestart
;;
status)
rhstatus
;;
check)
check
;;
*)
echo $"Usage: haproxy {start|stop|restart|reload|condrestart|status|check}"
RETVAL=1
esac
exit $RETVAL
haproxy加日志:
编辑/etc/syslog.conf文件, 添加内容如下:
local3.* /var/log/haproxy.log
local0.* /var/log/haproxy.log
编辑/etc/sysconfig/syslog文件,修改内容如下:
SYSLOGD_OPTIONS="-r -m 0"
然后重启syslog服务,命令如下:
service syslog restart
keepalived安装
主页:www.keepalived.org
[root@localhost tools]# wget http://www.keepalived.org/software/keepalived-1.2.7.tar.gz
[root@ha tools]# tar zxf keepalived-1.2.7.tar.gz
[root@ha tools]# cd keepalived-1.2.7
[root@ha keepalived-1.2.7]# ./configure --prefix=/usr/local/keepalived
过程中出错:
configure: error:
!!! OpenSSL is not properly installed on your system. !!!
!!! Can not include OpenSSL headers files. !!!
因为openssl没有安装好
yum install -y openssl-devel
[root@ha keepalived-1.2.7]# make
[root@ha keepalived-1.2.7]# make install
keepalived做成服务模式启动
[root@ha keepalived-1.2.7]# cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
[root@ha keepalived-1.2.7]# cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
[root@ha keepalived-1.2.7]# cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
[root@ha keepalived-1.2.7]# mkdir /etc/keepalived
[root@ha keepalived-1.2.7]# cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
主的配置文件
[root@ha keepalived-1.2.7]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_1
}
vrrp_script chk_haproxy {
script "/etc/keepalived/check_haproxy.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
!state MASTER
state BACKUP
priority 100
advert_int 1
virtual_router_id 50
garp_master_delay 1
interface eth1
nopreempt
authentication {
auth_type PASS
auth_pass Kxiaokk345Pix
}
track_interface {
eth0
eth1
}
virtual_ipaddress {
192.168.48.143
}
track_script {
chk_haproxy
}
! Configuration File for keepalived
global_defs {
router_id LVS_1
}
vrrp_script chk_haproxy {
script "/etc/keepalived/check_haproxy.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
!state MASTER
state BACKUP
priority 100
advert_int 1
virtual_router_id 50
garp_master_delay 1
interface eth1
nopreempt
authentication {
auth_type PASS
auth_pass Kxiaokk345Pix
}
track_interface {
eth0
eth1
}
virtual_ipaddress {
192.168.48.143
}
track_script {
chk_haproxy
}
!notify_master "/etc/keepalived/mailnotify.py master"
!notify_backup "/etc/keepalived/mailnotify.py backup"
!notify_fault "/etc/keepalived/mailnotify.py fault"
}
}
配置说明:
! Configuration File for keepalived
global_defs {
notification_email { #发生事件切换的时候,发送的邮箱,可以有多个,每行一个
[email protected]
}
notification_email_from [email protected] #指定发件人
smtp_server 127.0.0.1 #指定smtp服务器地址
smtp_connect_timeout 30 #指定smtp连接超时时间
router_id LVS_2 #运行keepalived机器的一个标识主备不能相同
}
#vrrp_script区域定义脚本名字和脚本执行的间隔和脚本执行的优先级变更
vrrp_script check_haproxy {
#定义监控nginx的命令,命令的$?返回1就改变优先级。
script "/etc/keepalived/check_haproxy.sh"
interval 5 #脚本执行间隔
weight -10 #脚本结果1导致的优先级变更:10表示优先级+10;-10则表示优先级-10
fall 2 # 检测几次返回1为失败
rise 1 # 检测几次返回0成功为ok
}
#VIP
vrrp_instance VI_1 { #监控多个网段的实例
state BACKUP #全部服务器都设为BACKUP,让优先级高的自动为master
# dont track primary #忽略VRRP的interface错误
track_interface {
eth0 #跟踪接口,设置额外的监控,里面任意一块网卡出现问题,都会进入故障(FAULT)状态
eth1
}
interface eth0 #实例绑定的网卡
mcast_src_ip 192.168.48.139 #指定主或备的eth0的Ip
virtual_router_id 51 #这里非常重要,相同的VRID为一个组
priority 100 #优先级,
advert_int 1 #检查间隔,默认1s
# nopreempt #不设置抢占,优先级高就做master,当主恢复时不抢占。nopreempt //master 设置为BACKUP ,通过priority来判断哪成为主,设置nopreempt 是可以在MASTER 出现问题修复好后不抢用vip,直接充当slave的角色。这样,可以确保session不会丢失
authentication { #认证
auth_type PASS #认证的方式,支持PASS和AH
auth_pass 123 #认证的密码
}
track_interface { #设置监听本机的接口
eth0
eth1
}
virtual_ipaddress { #指定漂移地址(VIP)
192.168.48.143 #如果有多个VIP,继续换行填写
}
track_script { #执行定义的命令
check_haproxy
}
}
haproxy检测脚本
[root@ha139 keepalived]# cat check_haproxy.sh
#!/bin/bash
#
# desc: check haproxy service
#
A=`ip address show eth1 | grep 192.168.48.143 | wc -l`
B=`ps -C haproxy --no-heading | wc -l`
if [ $A -eq 1 ]; then
if [ $B -eq 0 ]; then
/usr/local/haproxy/sbin/haproxy.sh start
sleep 3
fi
fi
主或备服务要求抢占:不要配置nopreempt
track_interface配置监听没有配置时,如果是多网卡,只能监控之中的一张网卡。
track_interface配置同时监听本机的eth0,eth1时,两张网卡之中的一张有问题,vip就会漂移
track_interface配置分别监听本机的eth0或eth1时,只是监听指定的本机网卡有问题时,vip才会漂移
主不要求抢占:加nopreempt,做到主不抢占,优先级高就做master,当主恢复时不抢占。//master 设置为BACKUP ,通过priority来判断哪成为主,设置nopreempt 是可以在MASTER 出现问题修复好后不抢用vip,直接充当slave的角色。这样,可以确保session不会丢失
抢占问题处理:http://bbs.linuxtone.org/thread-6788-1-1.html
高可用(keepalived+haproxy)切换测试:(两台机)
主或备断eth0或eth1网卡,看能否漂移,是否抢占。
主或备关keepaviled,看能否漂移。
软件版本:haproxy-1.3.26.tar.gz 、keepalived-1.2.7.tar.gz
网络拓扑:
192.168.48.143
+-----------VIP----------+
| eth1 |
| |
Master Backup
192.168.48.139 192.168.48.140
+----------+ +----------+
| HAProxy | eth0 | HAProxy |
|keepalived|-------------|keepalived|
+----------+1.139 1.140+----------+
|
v
+--------+
| |
| |
v v eth1
+------+ +------+
| WEB1 | | WEB2 |
+------+ +------+
48.141 48.142
haproxy安装
主页:http://haproxy.1wt.eu/
下载地址:http://haproxy.1wt.eu/download/1.3/src/haproxy-1.3.26.tar.gz
[root@localhost tools]# wget http://haproxy.1wt.eu/download/1.3/src/haproxy-1.3.26.tar.gz
[root@localhost tools]# tar zxf haproxy-1.3.26.tar.gz
[root@localhost tools]# cd haproxy-1.3.26
[root@localhost haproxy-1.3.26]# make TARGET=linux26 PREFIX=/usr/local/haproxy
[root@localhost haproxy-1.3.26]# make install PREFIX=/usr/local/haproxy
[root@localhost haproxy-1.3.26]# cd /usr/local/haproxy/
[root@localhost haproxy]# mkdir conf
主备配置一样
[root@localhost haproxy]# cat haproxy.cfg
global
log 127.0.0.1 local0
maxconn 65535
chroot /usr/local/haproxy
uid 99
gid 99
daemon
nbproc 2
#pidfile /usr/local/haproxy/haproxy.pid
debug
defaults
log 127.0.0.1 local3
mode http
option httplog
option httpclose
option dontlognull
option forwardfor
option redispatch
retries 2
maxconn 2000
# balance roundrobin
# stats uri /haproxy-stats
contimeout 5000
clitimeout 50000
srvtimeout 50000
frontend web_proxy
bind *:80
mode http
option httplog
log global
default_backend phppool
backend phppool
mode http
balance source
option httpchk HEAD /
server web1 192.168.48.141:80 check inter 2000
server web2 192.168.48.142:80 check inter 2000
listen web_ha
bind 0.0.0.0:8080
mode http
stats uri /haproxy-stats
stats hide-version
# stats realm Haproxy\statistics
stats auth gao:gao # 用户名/密码
haproxy启动脚本
[root@ha139 sbin]# cat haproxy.sh
#!/bin/sh
# chkconfig 35 on
# description: HAProxy is a TCP/HTTP reverse proxy which is particularly suited for high availability environments.
# Source function library.
if [ -f /etc/init.d/functions ]; then
. /etc/init.d/functions
elif [ -f /etc/rc.d/init.d/functions ] ; then
. /etc/rc.d/init.d/functions
else
exit 0
fi
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0
[ -f /usr/local/haproxy/conf/haproxy.cfg ] || exit 1
RETVAL=0
start() {
/usr/local/haproxy/sbin/haproxy -c -q -f /usr/local/haproxy/conf/haproxy.cfg
if [ $? -ne 0 ]; then
echo "Errors found in configuration file."
return 1
fi
echo -n "Starting HAproxy: "
daemon /usr/local/haproxy/sbin/haproxy -D -f /usr/local/haproxy/conf/haproxy.cfg -p /var/run/haproxy.pid
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/haproxy
return $RETVAL
}
stop() {
echo -n "Shutting down HAproxy: "
killproc haproxy -USR1
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/haproxy
[ $RETVAL -eq 0 ] && rm -f /var/run/haproxy.pid
return $RETVAL
}
restart() {
/usr/local/haproxy/sbin/haproxy -c -q -f /usr/local/haproxy/conf/haproxy.cfg
if [ $? -ne 0 ]; then
echo "Errors found in configuration file, check it with 'haproxy check'."
return 1
fi
stop
start
}
check() {
/usr/local/haproxy/sbin/haproxy -c -q -V -f /usr/local/haproxy/conf/haproxy.cfg
}
rhstatus() {
status haproxy
}
condrestart() {
[ -e /var/lock/subsys/haproxy ] && restart || :
}
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
restart
;;
reload)
restart
;;
condrestart)
condrestart
;;
status)
rhstatus
;;
check)
check
;;
*)
echo $"Usage: haproxy {start|stop|restart|reload|condrestart|status|check}"
RETVAL=1
esac
exit $RETVAL
haproxy加日志:
编辑/etc/syslog.conf文件, 添加内容如下:
local3.* /var/log/haproxy.log
local0.* /var/log/haproxy.log
编辑/etc/sysconfig/syslog文件,修改内容如下:
SYSLOGD_OPTIONS="-r -m 0"
然后重启syslog服务,命令如下:
service syslog restart
keepalived安装
主页:www.keepalived.org
[root@localhost tools]# wget http://www.keepalived.org/software/keepalived-1.2.7.tar.gz
[root@ha tools]# tar zxf keepalived-1.2.7.tar.gz
[root@ha tools]# cd keepalived-1.2.7
[root@ha keepalived-1.2.7]# ./configure --prefix=/usr/local/keepalived
过程中出错:
configure: error:
!!! OpenSSL is not properly installed on your system. !!!
!!! Can not include OpenSSL headers files. !!!
因为openssl没有安装好
yum install -y openssl-devel
[root@ha keepalived-1.2.7]# make
[root@ha keepalived-1.2.7]# make install
keepalived做成服务模式启动
[root@ha keepalived-1.2.7]# cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
[root@ha keepalived-1.2.7]# cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
[root@ha keepalived-1.2.7]# cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
[root@ha keepalived-1.2.7]# mkdir /etc/keepalived
[root@ha keepalived-1.2.7]# cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
主的配置文件
[root@ha keepalived-1.2.7]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_1
}
vrrp_script chk_haproxy {
script "/etc/keepalived/check_haproxy.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
!state MASTER
state BACKUP
priority 100
advert_int 1
virtual_router_id 50
garp_master_delay 1
interface eth1
nopreempt
authentication {
auth_type PASS
auth_pass Kxiaokk345Pix
}
track_interface {
eth0
eth1
}
virtual_ipaddress {
192.168.48.143
}
track_script {
chk_haproxy
}
! Configuration File for keepalived
global_defs {
router_id LVS_1
}
vrrp_script chk_haproxy {
script "/etc/keepalived/check_haproxy.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
!state MASTER
state BACKUP
priority 100
advert_int 1
virtual_router_id 50
garp_master_delay 1
interface eth1
nopreempt
authentication {
auth_type PASS
auth_pass Kxiaokk345Pix
}
track_interface {
eth0
eth1
}
virtual_ipaddress {
192.168.48.143
}
track_script {
chk_haproxy
}
!notify_master "/etc/keepalived/mailnotify.py master"
!notify_backup "/etc/keepalived/mailnotify.py backup"
!notify_fault "/etc/keepalived/mailnotify.py fault"
}
}
配置说明:
! Configuration File for keepalived
global_defs {
notification_email { #发生事件切换的时候,发送的邮箱,可以有多个,每行一个
[email protected]
}
notification_email_from [email protected] #指定发件人
smtp_server 127.0.0.1 #指定smtp服务器地址
smtp_connect_timeout 30 #指定smtp连接超时时间
router_id LVS_2 #运行keepalived机器的一个标识主备不能相同
}
#vrrp_script区域定义脚本名字和脚本执行的间隔和脚本执行的优先级变更
vrrp_script check_haproxy {
#定义监控nginx的命令,命令的$?返回1就改变优先级。
script "/etc/keepalived/check_haproxy.sh"
interval 5 #脚本执行间隔
weight -10 #脚本结果1导致的优先级变更:10表示优先级+10;-10则表示优先级-10
fall 2 # 检测几次返回1为失败
rise 1 # 检测几次返回0成功为ok
}
#VIP
vrrp_instance VI_1 { #监控多个网段的实例
state BACKUP #全部服务器都设为BACKUP,让优先级高的自动为master
# dont track primary #忽略VRRP的interface错误
track_interface {
eth0 #跟踪接口,设置额外的监控,里面任意一块网卡出现问题,都会进入故障(FAULT)状态
eth1
}
interface eth0 #实例绑定的网卡
mcast_src_ip 192.168.48.139 #指定主或备的eth0的Ip
virtual_router_id 51 #这里非常重要,相同的VRID为一个组
priority 100 #优先级,
advert_int 1 #检查间隔,默认1s
# nopreempt #不设置抢占,优先级高就做master,当主恢复时不抢占。nopreempt //master 设置为BACKUP ,通过priority来判断哪成为主,设置nopreempt 是可以在MASTER 出现问题修复好后不抢用vip,直接充当slave的角色。这样,可以确保session不会丢失
authentication { #认证
auth_type PASS #认证的方式,支持PASS和AH
auth_pass 123 #认证的密码
}
track_interface { #设置监听本机的接口
eth0
eth1
}
virtual_ipaddress { #指定漂移地址(VIP)
192.168.48.143 #如果有多个VIP,继续换行填写
}
track_script { #执行定义的命令
check_haproxy
}
}
haproxy检测脚本
[root@ha139 keepalived]# cat check_haproxy.sh
#!/bin/bash
#
# desc: check haproxy service
#
A=`ip address show eth1 | grep 192.168.48.143 | wc -l`
B=`ps -C haproxy --no-heading | wc -l`
if [ $A -eq 1 ]; then
if [ $B -eq 0 ]; then
/usr/local/haproxy/sbin/haproxy.sh start
sleep 3
fi
fi
主或备服务要求抢占:不要配置nopreempt
track_interface配置监听没有配置时,如果是多网卡,只能监控之中的一张网卡。
track_interface配置同时监听本机的eth0,eth1时,两张网卡之中的一张有问题,vip就会漂移
track_interface配置分别监听本机的eth0或eth1时,只是监听指定的本机网卡有问题时,vip才会漂移
主不要求抢占:加nopreempt,做到主不抢占,优先级高就做master,当主恢复时不抢占。//master 设置为BACKUP ,通过priority来判断哪成为主,设置nopreempt 是可以在MASTER 出现问题修复好后不抢用vip,直接充当slave的角色。这样,可以确保session不会丢失
抢占问题处理:http://bbs.linuxtone.org/thread-6788-1-1.html
高可用(keepalived+haproxy)切换测试:(两台机)
主或备断eth0或eth1网卡,看能否漂移,是否抢占。
主或备关keepaviled,看能否漂移。
并发测试
webbench最多可以模拟3万个并发连接去测试网站的负载能力,个人感觉要比Apache自带的ab压力测试工具好,安装使用也特别方便。
wget http://blog.s135.com/soft/linux/webbench/webbench-1.5.tar.gz
tar zxvf webbench-1.5.tar.gz
cd webbench-1.5
make &&mkdir -p /usr/local/man&& make install
使用:
webbench -c 500 -t 30 http://192.168.48.143
参数说明:-c表示并发数,-t表示时间(秒)
haproxy参考资料
http://network.51cto.com/art/201110/295955.htm HAProxy双机高可用方案之HAProxy+Keepalived(1)
http://dngood.blog.51cto.com/446195/738634 haproxy 安装与配置 (有配置说明)
http://os.51cto.com/art/201202/317741_2.htm HAProxy配置语法及实例(3)(有配置说明)
http://hi.baidu.com/gaolongquan/item/51a8f6c68f44ad61f7c95db0 HAProxy+Keepalived
http://xukaizijian.blog.163.com/blog/static/17043311920115283358709/ web] Haproxy配置(有配置说明)
https://blog.51cto.com/zt/232 HAProxy 能够做些什么?51cto专题
keepalived参考资料
http://xzregg.blog.51cto.com/3829250/976793 ngnix+keepalived 实现N主高可用负载均衡web群集 (有配置说明)
http://www.jb51.net/os/RedHat/55468.html haproxy+keepalived 负载均衡之主备切换
http://bbs.linuxtone.org/thread-6788-1-1.html vip抢占问题处理
http://www.tumblr.com/tagged/keepalived HAProxy + KeepAlived构建高可用的反向代理系统(带并发测试)
webbench最多可以模拟3万个并发连接去测试网站的负载能力,个人感觉要比Apache自带的ab压力测试工具好,安装使用也特别方便。
wget http://blog.s135.com/soft/linux/webbench/webbench-1.5.tar.gz
tar zxvf webbench-1.5.tar.gz
cd webbench-1.5
make &&mkdir -p /usr/local/man&& make install
使用:
webbench -c 500 -t 30 http://192.168.48.143
参数说明:-c表示并发数,-t表示时间(秒)
haproxy参考资料
http://network.51cto.com/art/201110/295955.htm HAProxy双机高可用方案之HAProxy+Keepalived(1)
http://dngood.blog.51cto.com/446195/738634 haproxy 安装与配置 (有配置说明)
http://os.51cto.com/art/201202/317741_2.htm HAProxy配置语法及实例(3)(有配置说明)
http://hi.baidu.com/gaolongquan/item/51a8f6c68f44ad61f7c95db0 HAProxy+Keepalived
http://xukaizijian.blog.163.com/blog/static/17043311920115283358709/ web] Haproxy配置(有配置说明)
https://blog.51cto.com/zt/232 HAProxy 能够做些什么?51cto专题
keepalived参考资料
http://xzregg.blog.51cto.com/3829250/976793 ngnix+keepalived 实现N主高可用负载均衡web群集 (有配置说明)
http://www.jb51.net/os/RedHat/55468.html haproxy+keepalived 负载均衡之主备切换
http://bbs.linuxtone.org/thread-6788-1-1.html vip抢占问题处理
http://www.tumblr.com/tagged/keepalived HAProxy + KeepAlived构建高可用的反向代理系统(带并发测试)
http://blog.s135.com/post/288/ 并发测试