Tomcat集群配置笔记

1. 软件环境：
 Apache: Apache_2.2.14 (1个)
 mod_jk: mod_jk_1.2.28_httpd_2.2.3.so (1个)
 tomcat: tomcat5.5.7(2个)
2.把mod_jk_1.2.28_httpd_2.2.3.so拷入apache安装目录modules下。
3.在apache的安装目录下找到httpd.conf文件,我的目录为D:\Apache2.2\conf。
 在该目录下新建mod_jk.conf文件，内容如上：
#============================================
#加载mod_jk Module
LoadModule jk_module modules/mod_jk-apache-2.0.55.so
#指定 workers.properties文件路径(在第三步我们建立该文件)
JkWorkersFile conf/workers.properties
#指定那些请求交给tomcat处理,"controller"为在workers.propertise里指定的负载分配控制器
JkMount /*.jsp controller
#==============================================
修改httpd.conf, 在文件最后加上下面一句话:
include "D:\Apache2.2\conf\mod_jk.conf"
3.同上一目录新建workers.properties,内容如下：
worker.list = controller,tomcat1,tomcat2  #server 列表
#========tomcat1========
worker.tomcat1.port=8009      #ajp13 端口号，在tomcat下server.xml配置,默认8009
worker.tomcat1.host=localhost #tomcat的主机地址，如不为本机，请填写ip地址
worker.tomcat1.type=ajp13
worker.tomcat1.lbfactor = 1   #server的加权比重，值越高，分得的请求越多
#========tomcat2========
worker.tomcat2.port=9009      #ajp13 端口号，在tomcat下server.xml配置,默认8009
worker.tomcat2.host=localhost #tomcat的主机地址，如不为本机，请填写ip地址
worker.tomcat2.type=ajp13
worker.tomcat2.lbfactor = 1   #server的加权比重，值越高，分得的请求越多
#========controller,负载均衡控制器========
worker.controller.type=lb
worker.controller.balanced_workers=tomcat1,tomcat2   #指定分担请求的tomcat
worker.controller.sticky_session=1 #会话粘性，大于0表示同一会有同一TOMCAT处理
4.修改TOMCAT的配置,这里主要是防止端口冲突，如果TOMCAT位于不同主机上，可SHIP该步。
   tomcat1: <Server port="8005" shutdown="SHUTDOWN">
            <!-- Define a non-SSL HTTP/1.1 Connector on port 8080 -->
            <Connector port="8080" maxHttpHeaderSize="8192"
               maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
               enableLookups="false" redirectPort="8443" acceptCount="100"
               connectionTimeout="20000" disableUploadTimeout="true" />
  
   tomcat2: <Server port="8005" shutdown="SHUTDOWN">
             <!-- Define a non-SSL HTTP/1.1 Connector on port 8080 -->
              <Connector port="8090" maxHttpHeaderSize="8192"
               maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
               enableLookups="false" redirectPort="8443" acceptCount="100"
               connectionTimeout="20000" disableUploadTimeout="true" />

5.配置集群打开各自的<Cluster>.
  
  tomcat1: <Cluster className="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
                 managerClassName="org.apache.catalina.cluster.session.DeltaManager"
                 expireSessionsOnShutdown="false"
                 useDirtyFlag="true"
                 notifyListenersOnReplication="true">

            <Membership
                className="org.apache.catalina.cluster.mcast.McastService"
                mcastAddr="228.0.0.4"
                mcastPort="45564"
                mcastFrequency="500"
                mcastDropTime="3000"/>

            <Receiver
                className="org.apache.catalina.cluster.tcp.ReplicationListener"
                tcpListenAddress="auto"
                tcpListenPort="4001"
                tcpSelectorTimeout="100"
                tcpThreadCount="6"/>

            <Sender
                className="org.apache.catalina.cluster.tcp.ReplicationTransmitter"
                replicationMode="pooled"
                ackTimeout="15000"
                waitForAck="true"/>

            <Valve className="org.apache.catalina.cluster.tcp.ReplicationValve"
                   filter=".*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt;"/>
                  
            <Deployer className="org.apache.catalina.cluster.deploy.FarmWarDeployer"
                      tempDir="/tmp/war-temp/"
                      deployDir="/tmp/war-deploy/"
                      watchDir="/tmp/war-listen/"
                      watchEnabled="false"/>
            <ClusterListener className="org.apache.catalina.cluster.session.ClusterSessionListener"/>
        </Cluster>     
   tomcat2: 同上,tcpListenPort="4001" 这里改为tcpListenPort="4002"
6.添加<distributable/>到web.xml.
例：<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns=" http://java.sun.com/xml/ns/javaee"
 xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation=" http://java.sun.com/xml/ns/javaee
  http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
 <distributable/>
....
</web-app>