apache2.2.22+tomcat6.0.35负载均衡和session复制

1.通过apache的官网下载httpd-2.2.22-win32-x86-no_ssl.msi和apache-tomcat-6.0.35-windows-x86.zip以及tomcat-connectors-1.2.37-windows-i386-httpd-2.2.x.zip

2.安装apache

3.解压缩tomcat，并且复制为两份，其中一份需要变更其中的server.xml文件中的端口，把8005，,8080,8009该为8006,8081，8010

4.把tomcat-connectors-1.2.37-windows-i386-httpd-2.2.x.zip解压缩，把其中的mod_jk.so拷贝的apache的modules目录下

5.在apache的conf目录下，修改httpd.conf文件，在文件的最后一行增加Include conf/mod_jk.conf

6.在apache的conf目录下，增加mod_jk.conf文件

 

#加入jk模块
LoadModule jk_module modules/mod_jk.so
#加载jk配置文件
JkWorkersFile "C:\\Apache2.2\\conf\\workers.properties"
#加载jk日志文件
JkLogFile "C:\\Apache2.2\\logs\\mod_jk.log"
#设置jk日志级别
JkLogLevel info
#设置jk日志格式
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories
JkRequestLogFormat "%w %V %T"

#loadbalancerJkMount /status mystatus
JkMount /examples/* loadbalancer
JkMount /status mystatus

 

7.在apache的conf目录下，增加workers.properties

worker.list=loadbalancer

worker.server1.type=ajp13
worker.server1.host=192.168.1.13
worker.server1.port=8009
worker.server1.lbfactor=1
worker.server1.socket_keepalive=1
worker.server1.socket_timeout=300

worker.server2.type=ajp13
worker.server2.host=192.168.1.13
worker.server2.port=8010
worker.server2.lbfactor=1
worker.server2.socket_keepalive=1
worker.server2.socket_timeout=300

worker.loadbalancer.type=lb
worker.loadbalancer.balanced_workers=server1,server2
worker.loadbalancer.sticky_session=false
worker.loadbalancer.sticky_session_force=true

worker.list=mystatus
worker.mystatus.type=status

注意：之前的8009和8010端口是tomcat的ajp监听器

8.修改tomcat的server.xml文件

<!-- 

<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
      -->       
     
         <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
                 channelSendOptions="6">

          <Manager className="org.apache.catalina.ha.session.BackupManager"
                   expireSessionsOnShutdown="false"
                   notifyListenersOnReplication="true"
                   mapSendOptions="6"/>
          <!--
          <Manager className="org.apache.catalina.ha.session.DeltaManager"
                   expireSessionsOnShutdown="false"
                   notifyListenersOnReplication="true"/>
          -->       
          <Channel className="org.apache.catalina.tribes.group.GroupChannel">
            <Membership className="org.apache.catalina.tribes.membership.McastService"
                        address="228.0.0.4"
                        port="45564"
                        frequency="500"
                        dropTime="3000"/>
            <Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver"
                      address="auto"
                      port="5000"
                      selectorTimeout="100"
                      maxThreads="6"/>

            <Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
              <Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>
            </Sender>
            <Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>
            <Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>
            <Interceptor className="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor"/>
          </Channel>

          <Valve className="org.apache.catalina.ha.tcp.ReplicationValve"
                 filter=".*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt;"/>

          <Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer"
                    tempDir="/tmp/war-temp/"
                    deployDir="/tmp/war-deploy/"
                    watchDir="/tmp/war-listen/"
                    watchEnabled="false"/>

          <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
        </Cluster>

9.启动apache和tomcat，访问apache的url，http://localhost:80/（注意：apache默认是80端口，可以通过修改apache的httpd.conf目录中的端口号）

10.在tomcat的webapps\examples\jsp的目录下新建一个session.jsp页面

<%@page contentType="text/html"%>
<HTML>
<HEAD><TITLE>Cluster -Ha JSP Sample </TITLE></HEAD>
<BODY>
<LI>serverd From Server: <b><%=request.getServerName()%></LI>
<LI>serverd Port Number: <b><%=request.getServerPort()%></LI>
<LI>serverd From Server: <b><%=java.net.InetAddress.getLocalHost().getHostName()%></LI>
<LI>serverd IP Address: <b><%=java.net.InetAddress.getLocalHost().getHostAddress()%></LI>
<LI>Sesion ID: <b><%=session.getId()%></LI>
<h3>Tomcat1</h3>
</BODY>
</HTML>

注意L其中的Tomcat1设置两个tomcat中为不同值，以区别连个tomcat之间的切换操作

11.修改webapps\examples\WEB-INF下的web.xml文件，增加   <distributable/>属性，（需要重启tomcat）

<display-name>Servlet and JSP Examples</display-name>
    <distributable/>

12.通过apache文件该应用，可以看到Tomcat1和Tocmat2之间的切换，但是sessionid是不变的，url：http://localhost:80/examples/jsp/session.jsp

13.如果把步骤11的<distributable/>给去掉，重启tomcat，访问url：http://localhost:80/examples/jsp/session.jsp，可以看到是Tomcat1和Tocmat2之间的切换，sessionid是变化的