Apache与Tomcat负载均衡
**************apache安装*********************************
1.官网下载httpd-2.0.64.tar.gz
2.解压文件 tar zxvf httpd-2.0.64.tar.gz，加压后文件夹为httpd-2.0.64
3.进入目录httpd-2.0.64，执行命令./configure --prefix=/usr/local/apache --enable-so
4.安装： 执行make和make install命令安装，安装完成之后会有一个apache目录
===apache启动
进入apache安装目录下的bin ./apachectl start
===apache停止服务 ./apachectl stop
*************mod_jk安装和配置****************************
从官网下载tomcat-connectors-1.2.36-src.tar.gz
解压并进入native目录，
./configure --with-apxs=/usr/local/apache/bin/apxs --with-java-home=/usr/local/jdk
make && make install后在/usr/local/apache/modules下面生成mod_jk.so
**************tomcat的安装和配置**************************
1.分别安装两个tomcat在目录/usr/local/tomcat1和/usr/local/tomcat2下面
2.修改server.xml中的内容
分别启动tomcat
****************httpd.conf下面的配置**********************
进入apache/conf目录下面，打开httpd.conf文件
在尾部加入
====编辑workers.properties
编辑如下内容
**********************测试程序*************************
编写测试界面index.jsp(内容如下)分别放在tomcat1和tomcat2的webapps/examples/jsp下面
1.官网下载httpd-2.0.64.tar.gz
2.解压文件 tar zxvf httpd-2.0.64.tar.gz，加压后文件夹为httpd-2.0.64
3.进入目录httpd-2.0.64，执行命令./configure --prefix=/usr/local/apache --enable-so
4.安装： 执行make和make install命令安装，安装完成之后会有一个apache目录
===apache启动
进入apache安装目录下的bin ./apachectl start
===apache停止服务 ./apachectl stop
*************mod_jk安装和配置****************************
从官网下载tomcat-connectors-1.2.36-src.tar.gz
解压并进入native目录，
./configure --with-apxs=/usr/local/apache/bin/apxs --with-java-home=/usr/local/jdk
make && make install后在/usr/local/apache/modules下面生成mod_jk.so
**************tomcat的安装和配置**************************
1.分别安装两个tomcat在目录/usr/local/tomcat1和/usr/local/tomcat2下面
2.修改server.xml中的内容
2.1<Server port="8005" shutdown="SHUTDOWN"> (tomcat2中改为8006端口)
2.2禁用http连接器，将如下内容注释
<Connector port="8080" protocol="HTTP/1.1" connectionTimeout="20000"
redirectPort="8443" />
2.3分别启用AJP连接器
<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
<Connector port="8010" protocol="AJP/1.3" redirectPort="8443" />
2.4<Engine name="Catalina" defaultHost="localhost">
分别更改为<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat1">
和 <Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat2">
分别启动tomcat
****************httpd.conf下面的配置**********************
进入apache/conf目录下面，打开httpd.conf文件
在尾部加入
LoadModule jk_module modules/mod_jk.so JkWorkersFile conf/workers.properties JkLogFile logs/mod_jk.log JkLogLevel warn #JkMount /jkmanager|/* jkstatus #JkMount /*.jsp controller JkMount /examples/jsp/* controller JkMount /*.do controller JkMount /*servlet controller
====编辑workers.properties
编辑如下内容
worker.list=controller,tomcat1,tomcat2 #================tomcat1============== worker.tomcat1.port=8009 #ajp13 port worker.tomcat1.host=localhost worker.tomcat1.type=ajp13 worker.tomcat1.lbfactor =1 #============tomcat2================ worker.tomcat2.port=8010 #ajp13 port worker.tomcat2.host=localhost worker.tomcat2.type=ajp13 worker.tomcat2.lbfactor=1 #=============controller================ worker.controller.type =lb worker.controller.balance_workers=tomcat1,tomcat2 worker.controller.sticky_session=1
**********************测试程序*************************
编写测试界面index.jsp(内容如下)分别放在tomcat1和tomcat2的webapps/examples/jsp下面
<body>
<h1><font color="red">Index Page Servered By Tomcat1</font></h1>
<!--tomcat2 下面相应为Tomcat2-->
<table align="center" border="1">
<tr>
<td>Session ID</td>
<td><%=session.getId()%></td>
</tr>
<tr>
<td>Created on</td>
<td><%=session.getCreationTime()%></td>
</tr>
</table>
</body>在浏览器访问:http://localhost/examples/jsp/index.jsp，会发现有时运行在tomcat1上有时会运行在tomcat2上，另外如果这时把tomcat1服务停掉，就会发现mod_jk这时只能连接到tomcat2上了，这时也就只能运行在tomcat2上了