haproxy 七层 负载均衡
系统：ubuntu12.04
环境：
client/haproxy ：192.168.30.138
web1 ：192.168.30.140
web2 ：192.168.30.141
软件安装：
一、haproxy/client：
1 、下载haproxy软件进行安装
#tar zxvfhaproxy-1.4.22.tar.gz
#makeTARGET=linux26
#make installPREFIX=/usr/local/haproxy
#cd/usr/local/haproxy/
#mkdir etc
#touchhaproxy.cfg
#vimhaproxy.cfg
global
log 127.0.0.1 local0 info
maxconn 409600
chroot /usr/local/haproxy
uid 99
gid 99
daemon
#nbproc 2
pidfile /usr/local/haproxy/haproxy.pid
stats socket /tmp/haproxy.sock
defaults
timeout server 150s
timeout connect 150s
timeout client 150s
timeout queue 150s
option httpclose
retries 3
option redispatch
stats uri /status
stats auth root:root
stats refresh 60s
frontend http
mode http
#bind-process 4
maxconn 1000000
bind *:80
acl test hdr(Host) -i test.com
use_backend test.com if test
acl nihao hdr(Host) -i nihao.com
use_backend nihao.com if nihao
#option httplog
#option dontlognull
backendtest.com
balance roundrobin
option httpchk HEAD /index.htmlHTTP/1.0
mode http
cookie SERVERID insert indirect
option abortonclose
server keep2 192.168.30.140:80
server web 192.168.30.141:80
backendnihao.com
balance roundrobin
option httpchk HEAD /index.htmlHTTP/1.0
mode http
cookie SERVERID insert indirect
option abortonclose
server keep2192.168.30.140:8080
server web 192.168.30.141:8080
2、启动haproxy
/usr/local/haproxy/sbin/haproxy�Cf /usr/local/haproxy/etc/haproxy.cfg
二、web1 、 web2 安装naginx 和 tomcat
（1）、安装配置naginx
#tar zxvfnginx-1.2.4.tar.gz
#cdnginx-1.2.4/
# ./configure--prefix=/usr/local/nginx
#make&& make install
# cd/usr/local/nginx/conf/
# mkdirsites-enabled
#vim/usr/local/nginx/conf/nginx.conf
添加如下行：
include /usr/local/nginx/conf/sites-enabled/*.conf; //以后多个项目的配置文件可放在如下目录（配置文件要求以conf为结尾）
#修改nginx主页面
#echo"test 140------test------140" > /usr/local/nginx/html/index.html
（2）、安装配置tomcat
1、安装JDK java环境
#chmod 755 jdk-6u20-linux-x64.bin
#mv jdk-6u20-linux-x64.bin /usr/local/
#cd /usr/local
#./jdk-6u20-linux-x64.bin
2、修改环境变量
Vim /etc/profile
JAVA_HOME=/usr/local/jdk1.6.0_20
PATH=$JAVA_HOME/bin:$PATH
CLASSPATH=$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export JAVA_HOME
export PATH
export CLASSPATH
3、解压tomcat
4、配置/etc/ environment
修改为以下
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games"
CLASSPATH=$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
JAVA_HOME=/usr/local/jdk1.6.0_20
5、启动tomcat
# tar -zxvf apache-tomcat-5.5.28.tar.gz -C /data/tomcat
# /data/tomcat/bin/startup.sh
6、修改tomcat主页面
#cd /usr/local/tomcat/webapps/ROOT
#rm �Crf *
#echo “testtomcat-----140------------tomcat” >index.html
重启即可
web2 配置与web1 相同两web 网管需要指向 haproxy服务器
三、客户端进行测试
1 配置hosts
#vim /etc/hosts
添加如下两行
192.168.30.138 test.com
192.168.30.138 nihao.com
测试结果 elinks �Cdump http://test.com显示140 和 141 的nginx
elinks �Cdumphttp://nihao.com显示 140 和141 的tomcat