java开发:apache+tomcat负载均衡

负责均衡可以动态分配请求到多个tomcat,有点像把tomcat并联的感觉.

我们的项目中有应用.找了很多资料,但比较零散,最后试出来了,笔记贴出来.备忘,分享.

我是在linux下做的 .

1. 安装jdk

略

2. 配置tomcat端口

3.安装gcc--貌似apache需要用到C\C++编译器.

外网,控制台运行yum install gcc

重启计算机

控制台运行yum install gcc-c++


 

4. 安装apache apache在官网下载,我用的是httpd-2.2.23

# tar -xzf httpd-2.2.23.tar.gz //解压,有图形界面可以用解压工具直接解压

# chownroot.root -R httpd-2.2.23 //授权

# cd httpd-2.2.23

#./configure --prefix=/usr/tomcat/apache //配置安装路径

 

# make&& make install //安装.写完这个文档交给老陈测试的时候,竟然漏了这一句,哈哈,特此红色

下载对应版本的mod_jk.so放在 /usr/tomcat/apache/modules下(若自带则跳过此步)

5.编译mod_jk模块

解压tomcat-connectors-1.2.37-src.tar.gz

进入native目录,执行./configure[空格]--with-apxs=/usr/tomcat/apache/bin/apxs

拷贝tomcat-connectors中的conf/workers.properties 和conf/uriworkermap.properties到apache的conf下

将workers.properties的内容替换为

worker.list=controller, tomcat1, tomcat2

#========tomcat1========

worker.tomcat1.port=8009

worker.tomcat1.host=localhost

worker.tomcat1.type=ajp13

worker.tomcat1.lbfactor = 1

worker.tomcat12.connection_pool_timeout=750

worker.tomcat12.socket_keepalive=0

worker.tomcat12.socket_timeout=3000

worker.tomcat12.connect_timeout=1000

worker.tomcat12.reply_timeout=3300

#========tomcat2========

worker.tomcat2.port=8209

worker.tomcat2.host=localhost

worker.tomcat2.type=ajp13

worker.tomcat2.lbfactor = 1

worker.tomcat12.connection_pool_timeout=750

worker.tomcat12.socket_keepalive=0

worker.tomcat12.socket_timeout=3000

worker.tomcat12.connect_timeout=1000

worker.tomcat12.reply_timeout=3300

#=======balance controller====

worker.controller.type=lb

worker.retries=3

worker.controller.balance_workers=tomcat1,tomcat2

worker.controller.sticky_session=1

6. 加载mod_jk

在httpd.conf中添加配置:

LoadModule jk_module modules/mod_jk.so

JkWorkersFile /usr/tomcat/apache/conf/workers.properties

JkMountFile /usr/tomcat/apache/conf/uriworkermap.properties

JkLogFile /usr/tomcat/apache/logs/mod_jk.log

JkLogLevel info

JkLogStampformat "[%a %b %d %H:%M:%S %Y]"

JkMount /* controller

JkMount /*.jsp controller

JkMount /*.action controller

# cat /usr/tomcat/apache/conf/workers.properties

# cat workers.properties

7. 启动tomcat1,tomcat2,在apache的bin下,运行./httpd启动apache

8.浏览器访问http://localhost 不加端口号,见到如下页面,表示负载均衡成功

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