apache+tomcat集群初探

 

ubuntu下面进行apache+tomcat集群：

1.下载httpd-2.2.19.tar.gz和 apache-tomcat-7.0.20.tar.gz

 

2.安装apache httpd

先解压：tar -zxvf httpd-2.2.19.tar.gz

切换目录：cd httpd-2.2.19

安装：

 ./configure --enable-mods-shared='proxy proxy_ajp proxy_balancer proxy_connect proxy_ftp proxy_http proxy_rewrite'

   注：如果出 现错误提示：checking whether to enable mod_deflate... configure: error: mod_deflate has been requested but can not be built due to prerequisite failures
 zlib-devel 没装的原因:
 apt-get install zlib1g-dev

make

 

make install

修改apache的配置文件/usr/local/apache2/conf/httpd.conf：Listen 80 修改为9999. 非root用户默认是不能用80端口。

 

测试是否安装成功：

#/usr/local/apache2/bin/httpd –k start

打开浏览器，输入：http://localhost:9999 ，显示“It works ”，安装成功。

 

3.安装两个tomcat

解压apache-tomcat-7.0.20.tar.gz。复制为tomcat1，tomcat2

 

4.修改tomcat2中的端口不要和tomcat1重复。

 

5.修改tomcat1/conf/server.xml文件：

     1、找到<Engine name="Catalina" defaultHost="localhost">，修改成<Engine name="Catalina" defaultHost="localhost"   jvmRoute="tomcat1" >

      2、在Engine 标签内，加入以下：

<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" <!--tomcat2不要重复这个端口号-->

                      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>

 

  tomcat2做类似的修改，粗字体不要重复即可

    3、修改apache的配置文件/usr/local/apache2/conf/httpd.conf：

    在文件的最后加入以下：

修改apache的配置文件/usr/local/apache2/conf/httpd.conf：
在文件的最后加入以下：
NameVirtualHost 192.168.1.158:9999
<VirtualHost 192.168.1.158:9999> 

ServerAdmin [email protected]
	#本机的IP地址
    ServerName 192.168.1.158
    ServerAlias 192.168.1.158
    ProxyPass / balancer://cluster/ stickysession=JSESSIONID|jsessionid nofailover=On 
    ProxyPassReverse / balancer://cluster/ 
    #ErrorLog "logs/error.log" 
    #CustomLog "logs/access.log" common
</VirtualHost>
#The ProxyRequests directive should usually be set off when using ProxyPass. 
ProxyRequests Off 
<proxy balancer://cluster> 
    BalancerMember ajp://192.168.1.158:8009 loadfactor=1 route=tomcat1 smax=5 max=20 ttl=120 retry=300 timeout=15
    BalancerMember ajp://192.168.1.158:9009 loadfactor=1 route=tomcat2 smax=5 max=20 ttl=120 retry=300 timeout=15
    ProxySet lbmethod=bytraffic
</proxy>

   注：ajp://192.168.1.158:8009 的端口一定要与对应的tomcat的server.xml中的<Connector port="8009"
 protocol="AJP/1.3" redirectPort="8443" />的端口一致。

 

6.测试集群

   1、创建一个java web project，命名为Test
   2、修改web.xml，加入<distributable/>
   3、创建index.jsp页面，内容如下：

<%@ page contentType="text/html; charset=GBK" %> 
<%@ page import="java.util.*" %> 
<html><head><title>Cluster Test</title></head> 
<body> 
<% 
  //HttpSession session = request.getSession(true); 

  System.out.println(session.getId()); 
  out.println("<br> SESSION ID:" + session.getId()+"<br>");   
  // 如果有新的请求，则添加session属性 
  String name = request.getParameter("name"); 
  if (name != null && name.length() > 0) { 
     String value = request.getParameter("value"); 
     session.setAttribute(name, value); 
  }   
    out.print("<b>Session List:</b>");   
    Enumeration<String> names = session.getAttributeNames(); 
    while (names.hasMoreElements()) { 
        String sname = names.nextElement();  
        String value = session.getAttribute(sname).toString(); 
        out.println( sname + " = " + value+"<br>"); 
        System.out.println( sname + " = " + value); 
   } 

%> 
</body> 
</html>

 把java web project工程复制到两个tomcat的webapp目录中。启动tomcat：./startup.sh和apache：./httpd -k start。在浏览器中输入：http://localhost:9999/Test/index.jsp

 

以上步骤只是为了记录本人的一点操作流程，这年头好记性不如破网络。