整合 apache2.2 tomcat5.5 proxy （二）

首先安装Apache2.2:
由于安装apache2.2需要先安装arp和arp-util这两个东东所以也要从上下载.
安装apr
# cd srclib/apr
# ./configure --prefix=/usr/local/apr
# make
# make install
安装apr-util
# cd ../apr-util/
# ./configure --prefix=/usr/local/apr-util   --with-apr=/usr/local/apr
# make
# make install
安装 apache(编译时加入ajp代理以及反向代理参数以及负载均衡参数)
#./configure --prefix=/usr/apache2.2 --enable-proxy --enable-proxy-ajp --enable-proxy-balancer --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util
#make
#make install
启动apache:
#/usr/apache2.2/bin/apachectl –k start
负载均衡配置
apache安装成功以后需要对它的两个配置文件conf/httpd.conf和conf/extra/httpd-vhosts.conf做一点小小的修改。
在conf/httpd.conf文件里搜索一下“Include conf/extra/httpd-vhosts.conf”，把前面的“#”去掉。然后“conf/extra/httpd-vhosts.conf”文件修改如下：

    ServerName localhost #服务器名称
    CustomLog logs/dmim_log combined #日志
#负载均衡配置,可列出多个Tomcat;以下为连接Tomcat AJP监听器,
   
    BalancerMember ajp://134.140.55.236:8009
    BalancerMember ajp://134.140.55.236:9009
    BalancerMember ajp://134.140.55.239:8009
   
#代理配置
   
    ProxyPass balancer://localhost/
    #ProxyPassReverse balancer://localhost/
   

集群配置:
Tomcat5.5自带集群功能,只要把server.xml中的“Cluster”元素注释掉就行了,并且在每个web应用项目的web.xml文件，添加元素。然后把tomcat复制几份到不同机器就行了(根据Tomcat官方文档描述一般配置2~4个作为集群,tomcat的配置要跟apache的负载均衡配置相对应);如果集群放在同一台机器上,要注意修改各个server.xml的以下元素: (红色的表示每个服务器配置的端口都不能一样,以免端口被占用)

                     maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
                enableLookups="false" redirectPort="8443" acceptCount="100"
                connectionTimeout="20000" disableUploadTimeout="true" />
                enableLookups="false" redirectPort="8443" protocol="AJP/1.3" />
                           managerClassName="org.apache.catalina.cluster.session.DeltaManager"
                  expireSessionsOnShutdown="false"
                  useDirtyFlag="true"
                  notifyListenersOnReplication="true">
                              className="org.apache.catalina.cluster.mcast.McastService"
                 mcastAddr="228.0.0.4"
                 mcastPort="45564"
                 mcastFrequency="500"
                 mcastDropTime="3000"/>
                              className="org.apache.catalina.cluster.tcp.ReplicationListener"
                 tcpListenAddress="auto"
                 tcpListenPort="4001"
                 tcpSelectorTimeout="100"
                 tcpThreadCount="6"/>
                              className="org.apache.catalina.cluster.tcp.ReplicationTransmitter"
                 replicationMode="pooled"
                 ackTimeout="15000"
                 waitForAck="true"/>
                                 filter=".*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt;"/>
                                    tempDir="/tmp/war-temp/"
                       deployDir="/tmp/war-deploy/"
                       watchDir="/tmp/war-listen/"
                       watchEnabled="false"/>                    
            
        
最后重启apache和各个tomcat就行了