日期:2014-05-16  浏览次数:20862 次

windows下apache服务器和tomcat集群
上篇文章呢将乐如何集成apache服务器和tomcat服务器,见文章http://lym6520.iteye.com/admin/blogs/412046,接下来讲讲如何tomcat集群
首先呢,修改配置文件workers.properties
# the list of workers
worker.list=router,worker1,worker2

worker.worker1.type=ajp13
worker.worker1.host=ip
worker.worker1.port=port
worker.worker1.lbfactor=100

worker.worker2.type=ajp13
worker.worker2.host=ip
worker.worker2.port=port
worker.worker2.lbfactor=100

worker.router.type = lb
worker.router.balance_workers=worker1,worker2
worker.router.sticky_session = true
worker.router.sticky_session_force = false

这个配置文件,配置了两个tomcat和一个负载平衡器router(要注意的是,worker1和worker2分别对应各自tomcat服务器server.xml的 Engine的jvmRoute值)
这样tomcat集群基本上配置完成了,但是这样会有个问题,会话不能共享,也就是说我将同一个项目分别部署在这两个tomcat上,通过apache服务器访问这个项目,发现会话不能共享,需要重复登入,为了解决这个问题,可以再两个tomcat服务器的server.xml里的Engine元素增加以下配置信息(该配置信息可以再tomcat官网中找到):
 <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="4000"
                      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"/>

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

(在Membership 元素中有个bind属性,可以明确的指定当前服务器的ip地址)
这样就能保证会话可以在两个tomcat将共享了,当然在项目的web.xml中加入如下配置:
<!--  将会话移交给tomcat server.xml配置的会话管理器管理 --> 
  <distributable /> 

ok,大功告成!下次我将介绍如何在linux下配置apache服务器!