配置Apache+Tomcat集群
操作系统：Debian6.0 (192.168.225.129 虚拟机1台)
软件版本：Apache-2.2.16, Tomcat-6.0.35
1.安装软件
>apt-get install update
*安装Apache
>apt-get install apache2
*安装Tomcat
>wget http://apache.etoak.com/tomcat/tomcat-6/v6.0.35/bin/apache-tomcat-6.0.35.tar.gz
>tar zxvf apache-tomcat-6.0.35.tar.gz
>mv apache-tomcat-6.0.35 /user/local/tomcat
>cp /usr/local/tomcat /usr/local/tomcat2
*安装mod_jk
>apt-get install libapache2-mod-jk
2.配置2个Tomcat
现在/usr/local目录中已经有2个tomcat目录了，需要更改tomcat2的端口，防止端口冲突。
>nano /usr/local/tomcat/conf/server.xml
有3处的默认端口需要更改：
1.<Server port="8004" shutdown="SHUTDOWN"> 我更改为8003
2.<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
更改为7080
3.<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
更改为7009，其中redirectPort 8443不需要更改
o.另外还需要在<Engine>配置中加入<Cluster>配置
<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="4001" selectorTimeout="5000" maxThreads="6"/> <!-- timeout="60000"--> <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=""/> <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>
x.最后2个tomcat都需要改变<Engine的 jvmRoute属性分别为tomcat1和tomcat2，以对应之后worker.properties中的名字。
3.配置Apache以jk方式和tomcat集群
安装完成后apache的主目录为/etc/apache2,安装完mod-jk之后，mods-enabled里面会多一个jk.load
创建文件 /etc/apache2/mods-enabled/jk.conf
>nano /etc/apache2/mods-enabled/jk.conf
JkWorkersFile /etc/apache2/workers.properties
JkShmFile /var/log/apache2/mod_jk.shm
JkLogFile /var/log/apache2/mod_jk.log
JkLogLevel info
创建文件 /etc/apache2/workers.properties
>nano /etc/apache2/workers.properties
worker.list=controller1
worker.tomcat1.port=8009
worker.tomcat1.host=localhost
worker.tomcat1.type=ajp13
worker.tomcat1.lbfactor=1
worker.tomcat2.port=7009
worker.tomcat2.host=localhost
worker.tomcat2.type=ajp13
worker.tomcat2.lbfactor=1
worker.controller1.type=lb
worker.controller1.sticky_session=1 #可选项0,1
worker.controller1.balance_workers=tomcat1,tomcat2
更改/etc/apache2/sites-enabled/000-default文件
在</VirtualHost>之前添加
JkMount /* controller1
(controller1对应workers.properties中的名字)
配置完成之后先后启动tomcat和apache。
测试：
2个tomcat部署相同的应用：即首页index.jsp显示各自tomcat名称tomcat1和tomcat2
通过80端口访问应用，刷新几次，tomcat1和tomcat2轮流显示。
