1、安装tomcat+apache+mysql。
2、修改tomcat的端口，即修改server.xml中的配置，并修改 <Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat_8084">
3、修改httpd.conf，解注释Include conf.d/*.conf
4、在conf.d文件夹中加入xxx.conf文件，在该文件中添加如下配置：
#LoadModule proxy_http_module modules/mod_proxy_http.so
ProxyRequests Off
ProxyPass / balancer://chinatrial-cluster/ stickysession=JSESSIONID nofailover=Off
ProxyPa***everse / http://127.0.0.1:8084/
ProxyPa***everse / http://127.0.0.1:8184/
#ProxyPa***everse / http://127.0.0.1:8380/
<Proxy balancer://chinatrial-cluster>
   BalancerMember  http://127.0.0.1:8084/  max=800 loadfactor=10 route=tomcat_8084
   BalancerMember  http://127.0.0.1:8184/  max=800 loadfactor=10 route=tomcat_8184
#   BalancerMember  http://127.0.0.1:8380/  max=800 loadfactor=10 route=chinatrial_8080
</Proxy>
其中route后面的值是和tomcat的server.xml中的<Engine>中的jvmRoute相对应
5、实现session共享
在数据库中建session共享表：
CREATE DATABASE `session`
USE `session`;
DROP TABLE IF EXISTS `session`.`tomcat_sessions`;
CREATE TABLE  `session`.`tomcat_sessions` (
  `session_id` varchar(100) NOT NULL,
  `valid_session` char(1) NOT NULL,
  `max_inactive` int(11) NOT NULL,
  `last_access` bigint(20) NOT NULL,
  `app_context` varchar(255) default NULL,
  `session_data` mediumblob,
  PRIMARY KEY  (`session_id`),
  KEY `kapp_context` (`app_context`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
6、在项目的context.xml中进行Manager的配置：
    <Manager className="org.apache.catalina.session.PersistentManager"
             debug="99" saveOnRestart="true" maxActiveSessions="-1"
             minIdleSwap="30" maxIdleSwap="600" maxIdleBackup="0">
        <Store className="org.apache.catalina.session.JDBCStore"
               driverName="com.mysql.jdbc.Driver"
               connectionURL="jdbc:mysql://172.16.100.229/session?user=root&amp;password=nazca123&amp;useUnicode=true&amp;characterEncodeing=utf-8"
               sessionTable="tomcat_sessions" sessionIdCol="session_id"
               sessionDataCol="session_data" sessionValidCol="valid_session"
               sessionMaxInactiveCol="max_inactive"
               sessionLastAccessedCol="last_access" sessionAppCol='app_context'
               checkInterval="60" debug="0" />
    </Manager>