负载均衡工具haproxy安装配置使用
一，什么是haproxyHAProxy提供高可用性、负载均衡以及基于TCP和HTTP应用的代 理，支持虚拟主机，它是免费、快速并且可靠的一种解决方案。HAProxy特别适用于那些负载特大的web站点，这些站点通常又需要会话保持或七层处理。HAProxy运行在当前的硬件上，完全可以支持数以万计的并发连接。并且它的运行模式使得它可以很简单安全的整合进您当前的架构中， 同时可以保护你的web服务器不被暴露到网络上。
二，安装haproxy
下载列表地址http://haproxy.1wt.eu
wget http://haproxy.1wt.eu/download/1.4/src/haproxy-1.4.8.tar.gz
tar zxvf haproxy-1.4.8.tar.gz
cd haproxy-1.4.8
uname -a //查看linux内核版本
make TARGET=linux26 PREFIX=/usr/local/haproxy
make install PREFIX=/usr/local/haproxy
三，配置haproxy
vi /usr/local/haproxy/haproxy.cfg
[*]global
[*] maxconn 5120
[*] chroot /usr/local/haproxy
[*] uid 99
[*] gid 99
[*] daemon
[*] quiet
[*] nbproc 2
[*] pidfile /usr/local/haproxy/haproxy.pid
[*]defaults
[*] log global
[*] mode http
[*] option httplog
[*] option dontlognull
[*] log 127.0.0.1 local3
[*] retries 3
[*] option redispatch
[*] maxconn 2000
[*] contimeout 5000
[*] clitimeout 50000
[*] srvtimeout 50000
[*]
[*]listen webinfo :1080
[*] mode http
[*] balance roundrobin
[*] option httpclose
[*] option forwardfor
[*]server localhost 192.168.18.2:10000 check weight 1 minconn 1 maxconn 3 check inter 40000
[*]server localhost 127.0.0.1:80 check weight 1 minconn 1 maxconn 3 check inter 40000
[*]
[*]listen webmb :1081
[*] mode http
[*] balance roundrobin
[*] option httpclose
[*] option forwardfor
[*]server webmb1 192.168.1.91:10000 weight 1 minconn 1 maxconn 3 check inter 40000
[*]server webmb2 127.0.0.1:10000 weight 1 minconn 1 maxconn 3 check inter 40000
[*]
[*] listen stats :8888
[*] mode http
[*] transparent
[*] stats uri / haproxy-stats
[*] stats realm Haproxy \ statistic
[*] stats auth zhangy:xtajmd
三，启动haproxy
#启动haproxy
/usr/local/haproxy/haproxy -f /usr/local/haproxy/haproxy.cfg
#查看是否启动
$ ps -e|grep haproxy
4859 ? 00:00:00 haproxy
4860 ? 00:00:00 haproxy
四，压力测试
# ab -c 10 -n 10000 http://localhost:1080/
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking 127.0.0.1 (be patient)
Completed 1000 requests
Completed 2000 requests
Completed 3000 requests
Completed 4000 requests
Completed 5000 requests
Completed 6000 requests
Completed 7000 requests
Completed 8000 requests
Completed 9000 requests
Completed 10000 requests
Finished 10000 requests
Server Software: Apache/2.2.20
Server Hostname: 127.0.0.1
Server Port: 1080
Document Path: /
Document Length: 177 bytes
Concurrency Level: 10
Time taken for tests: 4.438 seconds
Complete requests: 10000
Failed requests: 0
Write errors: 0
Total transferred: 4530000 bytes
HTML transferred: 1770000 bytes
Requests per second: 2253.38 [#/sec] (mean)
Time per request: 4.438 (mean)
Time per request: 0.444 (mean, across all concurrent requests)
Transfer rate: 996.86 received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.3 0 10
Processing: 0 4 3.6 4 46
Waiting: 0 4 3.5 3 46
Total: 0 4 3.6 4 46
Percentage of the requests served within a certain time (ms)
50% 4
66% 5
75% 5
80% 6
90% 8
95% 12
98% 15
99% 18
100% 46 (longest request)
说明：haproxy监听的端口是1080，代理192.168.18.2:10000，127.0.0.1:10000
统计监听的是8888端口http://localhost:8888/haproxy-stats
haproxy负载均衡
说明：
原博客中需要配置相关页面phpinfo.php
由于没有php页面，我就使用apache服务器的默认页面
配置说明：
1.4系列参考配置文件
http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
1.3系列参考配置文件
http://haproxy.1wt.eu/download/1.3/doc/configuration.txt
转自 http://blog.51yip.com/server/868.html
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