apache2.2.x+tomcat7.0.x集群+session复制

apache http server下载地址

http://httpd.apache.org/download.cgi#apache22

这里下载的是httpd-2.2.21-win32-x86-openssl-0.9.8r.msi

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tomcat下载地址

http://tomcat.apache.org/download-70.cgi

这里下载的是http://apache.etoak.com/tomcat/tomcat-7/v7.0.23/bin/apache-tomcat-7.0.23.zip

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jk下载地址

http://labs.renren.com/apache-mirror//tomcat/tomcat-connectors/jk/binaries/windows/

这里下载的是tomcat-connectors-1.2.32-windows-i386-httpd-2.2.x.zip

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首先安装apache

然后解压缩tomcat，并将tomcat复制出两份

解压缩jk

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将mod_jk.so文件复制到apache/modules文件夹

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修改apache/conf/httpd.conf文件

在当前文件最后写入

include conf/mod_jk.conf

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在apache/conf目录中，建立mod_jk.conf文件，文件内容如下

#加载mod_jk Module
LoadModule jk_module modules/mod_jk.so

#指定 workers.properties文件路径
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 /**.do controller
JkMount /**.html controller
JkMount /* controller

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在apache/conf目录中，建立workers.properties文件，内容如下

worker.list = controller,tomcat1,tomcat2  #server 列表

#========tomcat1========
worker.tomcat1.port=18009         #ajp13 端口号，在tomcat下server.xml配置,默认8009
worker.tomcat1.host=localhost  #tomcat的主机地址，如果不是本机，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=28009       #ajp13 端口号，在tomcat下server.xml配置,默认8009
worker.tomcat2.host=localhost  #tomcat的主机地址，如果不是本机，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

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修改第一个tomcat/conf/server.xml

将

<Server port="8005" shutdown

改为

<Server port="18005"

将

<Connector port="8080" protocol="HTTP/1.1"

改为

<Connector port="18080"

将

<Connector port="8009" protocol="AJP/1.3"

改为

<Connector port="18009"

将

<Engine name="Catalina" defaultHost="localhost"

增加jvmRoute

<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat1"

在<Engine name="Catalina"这个标签的下面添加

 <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
                 channelSendOptions="8">
          <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="14000"
                      autoBind="100"
                      selectorTimeout="5000"
                      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"/>
          </Channel>
          <Valve className="org.apache.catalina.ha.tcp.ReplicationValve"
                 filter=""/>
          <Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>
          <ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/>
          <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
        </Cluster>

第一个tomcat配置完毕

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修改第二个tomcat/conf/server.xml

将

<Server port="8005" shutdown

改为

<Server port="28005"

将

<Connector port="8080" protocol="HTTP/1.1"

改为

<Connector port="28080"

将

<Connector port="8009" protocol="AJP/1.3"

改为

<Connector port="28009"

将

<Engine name="Catalina" defaultHost="localhost"

增加jvmRoute

<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat2"

在<Engine name="Catalina"这个标签的下面添加

 <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
                 channelSendOptions="8">
          <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="24000"
                      autoBind="100"
                      selectorTimeout="5000"
                      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"/>
          </Channel>
          <Valve className="org.apache.catalina.ha.tcp.ReplicationValve"
                 filter=""/>
          <Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>
          <ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/>
          <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
        </Cluster>

第二个tomcat配置完毕

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在项目的web.xml的最下方，添加支持session复制的语句

     <distributable />
</web-app>

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集群和session复制配置完毕，将war包分别部署到两个tomcat的webapps目录就可以实现项目的负载均衡和session复制。

一个很重要的问题，要实现session复制，必须序列化所有要存到session中的东西才行，例如

SessionInfo sessionInfo = new SessionInfo();
session.setAttribute("sessionInfo",sessionInfo);

这个sessionInfo必须 implements java.io.Serializable 才可以进行session复制，否则报错。