tomcat-session复制
参考： tomcat.apache.org -->Documentation -->TomcatX -->Clustering
实验环境：centos5.11 64,jdk1.6 tomcat6
IP:192.168.10.10 tomcatA nginx , tomcat ,
IP:192.168.10.11 tomcatB tomcat
配置如下：
nginx:
upstream mytomcat {
server localhost:8080;
server 192.168.10.11:8080;
}
server {
listen 80;
server_name localhost;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
proxy_pass http://mytomcat;
}
tomcatA/B:
测试页面：
#vi $TOMCAT_HOME/webapps/ROOT/test.jsp
<%@ page language="java" %>
<html>
<head><title>TomcatA/B</title></head>
<body>
<h1><font color="blue">TomcatB.dodowolf.com</font></h1>
<table align="centre" border="1">
<tr>
<td>Session ID</td>
<% session.setAttribute("dodowolf.com","dodowolf.com"); %>
<td><%= session.getId() %></td>
</tr>
<tr>
<td>Created on</td>
<td><%= session.getCreationTime() %></td>
</tr>
</table>
</body>
</html>
#cat $TOMCAT_HOME/webapps/ROOT/WEB-INF/web.xml
...
...
<distributable/>
</web-app>
修改server.xml文件：
<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>
注意：1.在各节点的server.xml的engine或host容器添加如上内容
2.注意修改MemberShip组件中的多播地址address="228.0.0.4"
3.建议修改Receiver中的address为本机能够传递心跳信息的地址
4.在各节点为使用组播地址添加组播路由，格式：
route add -net $MCAST_ADDRESS netmask 255.255.255.255 dev eth0
5.在相应应用程序的web.xml中添加<distributable\>
6.以上内容定义在Engine容器中，则表示对所有主机均启动用集群功能， Engine 参数 jvmRoute="TomcatA" ，另一台要改为“TomcatB”。如果定义在某Host中，则表示仅对此主机 启用集群功能