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Tomcat session集群

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08/28
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author：JevonWei

版权声明：原创作品

环境

tomcatA 172.16.253.108
tomcatB 172.16.253.105
代理服务器 172.16.253.191

Tomcat session集群

  • Cluster配置文档http://tomcat.apache.org/tomcat-7.0-doc/cluster-howto.html

Tomcat A

[root@tomcatA ~]# yum -y install tomcat-lib tomcat tomcat-webapps tomcat-docs-webapp tomcat-admin-webapps \\tomcat-admin-webapps为tomcat管理应用程序包 tomcat-docs-webapp为tomcat的在线文档软件包
[root@tomcatA ~]# iptables -F
[root@tomcatA ~]# setenforce 0
[root@tomcatA ~]# ls /usr/share/tomcat/webapps/
docs examples host-manager manager ROOT sample
[root@tomcatA ~]# ls /var/lib/tomcat/webapps/
docs examples host-manager manager ROOT sample
[root@tomcatA ~]# mkdir -pv /data/webapps/ROOT/{classes,lib,WEB-INF}
[root@tomcatA ~]# vim /data/webapps/ROOT/WEB-INF/index.jsp
<%@ page language="java" %>
<html>
<head><title>TomcatA</title></head>
<body>
<h1><font color="red">TomcatA.magedu.com</font></h1>
<table align="centre" border="1">
<tr>
<td>Session ID</td>
<% session.setAttribute("magedu.com","magedu.com"); %>
<td><%= session.getId() %></td>
</tr>
<tr>
<td>Created on</td>
<td><%= session.getCreationTime() %></td>
</tr>
</table>
</body>
</html>
[root@tomcatA ~]# vim /data/webapps/ROOT/index.jsp
<%@ page language="java" %>
<html>
<head><title>TomcatA</title></head>
<body>
<h1><font color="red">TomcatA.magedu.com</font></h1>
<table align="centre" border="1">
<tr>
<td>Session ID</td>
<% session.setAttribute("magedu.com","magedu.com"); %>
<td><%= session.getId() %></td>
</tr>
<tr>
<td>Created on</td>
<td><%= session.getCreationTime() %></td>
</tr>
</table>
</body>
</html>配置Tomcat 集群
[root@tomcatA ~]# vim /etc/tomcat/server.xml <Engine name="Catalina" defaultHost="www.jevon1.com" jvmRoute="tcA"> \\定义默认host主机，且添加Route标识符区别集群中的各Tomcat节点 将以下内容或http://tomcat.apache.org/tomcat-7.0-doc/cluster-howto.html中的Cluster配置放置到Engine或host区域即可，以下放置在了Engine区域 <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
channelSendOptions="8"> <Manager className="org.apache.catalina.ha.session.DeltaManager" \\使用Delta会话管理器
expireSessionsOnShutdown="false" \\永不过期
notifyListenersOnReplication="true"/> <Channel \\定义集群中的成员及通信 className="org.apache.catalina.tribes.group.GroupChannel">
<Membership className="org.apache.catalina.tribes.membership.McastService" \\成员关系判定，使用多播地址通信
address="228.13.5.5" \\定义通信的多播地址，224-239网段
port="45564" \\发送多播信息的端口
frequency="500" \\发送信号的间隔
dropTime="3000"/> \\最长信号信号间隔超时时长
<Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" \\接收会话的机制，NioReceiver异步IO模式
address="172.16.253.108" \\定义接收信息的监听地址，可为auto自动识别接收IP地址
port="4000"
autoBind="100"
selectorTimeout="5000" \\选择期的超时时长
maxThreads="6"/> \\最大线程数 <Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter"> \\发送会话的机制，使用复制模式
<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" \\定义数据过滤信息
filter=""/>
<Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/> <Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer" \\自动调用部署器部署集群
tempDir="/tmp/war-temp/"
deployDir="/tmp/war-deploy/"
watchDir="/tmp/war-listen/"
watchEnabled="false"/> <ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/> \\集群的监听器
<ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
</Cluster> <Host name="www.jevon1.com" appBase="/data/webapps" unpackWARs="true" autoDeploy="true" >
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="jevon_access_log" suffix=".log"
pattern="%h %l %u %t &quot;%r&quot; %s %b" />
</Host>
[root@tomcatA ~]# cp /etc/tomcat/web.xml /data/webapps/ROOT/WEB-INF/
[root@tomcatA ~]# cd /data/webapps/ROOT/WEB-INF/
[root@tomcatA WEB-INF]# vim web.xml
在<web-app区域中添加<distributable/> 元素，如下
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<distributable/>
[root@tomcatA tomcat]# systemctl start tomcat

Tomcat B

[root@tomcatB ~]# yum -y install tomcat-lib tomcat tomcat-webapps tomcat-docs-webapp tomcat-admin-webapps \\tomcat-admin-webapps为tomcat管理应用程序包 tomcat-docs-webapp为tomcat的在线文档软件包
[root@tomcatB ~]# iptables -F
[root@tomcatB ~]# setenforce 0
[root@tomcatB ~]# ls /usr/share/tomcat/webapps/
docs examples host-manager manager ROOT sample
[root@tomcatB ~]# ls /var/lib/tomcat/webapps/
docs examples host-manager manager ROOT sample
[root@tomcatB ~]# mkdir -pv /usr/share/tomcat/webapps/test/{classes,lib,WEB-INF,META-INF}
[root@tomcatB ~]# vim /data/webapps/ROOT/index.jsp
<%@ page language="java" %> \\表示页面的编程语言
<%@ page import="java.util.*" %> \\导入的java类库
<html>
<head>
<title>Test Page</title> \\网页的标题
</head>
<body>
<% out.println("hello world");
%>
</body>
</html>
[root@TomcatB ~]# vim /etc/tomcat/server.xml
<Engine name="Catalina" defaultHost="www.jevon2.com" jvmRoute="tcB"> \\定义默认host主机，且添加Route标识符区别集群中的各Tomcat节点 将以下内容或http://tomcat.apache.org/tomcat-7.0-doc/cluster-howto.html中的Cluster配置放置到Engine或host区域即可，以下放置在了Engine区域
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
channelSendOptions="8"> <Manager className="org.apache.catalina.ha.session.DeltaManager" \\使用Delta会话管理器
expireSessionsOnShutdown="false" \\永不过期
notifyListenersOnReplication="true"/> <Channel \\定义集群中的成员及通信 className="org.apache.catalina.tribes.group.GroupChannel">
<Membership className="org.apache.catalina.tribes.membership.McastService" \\成员关系判定，使用多播地址通信
address="228.13.5.5" \\定义通信的多播地址，224-239网段
port="45564" \\发送多播信息的端口
frequency="500" \\发送信号的间隔
dropTime="3000"/> \\最长信号信号间隔超时时长
<Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" \\接收会话的机制，NioReceiver异步IO模式
address="172.16.253.105" \\定义接收信息的监听地址，可为auto自动识别接收IP地址
port="4000"
autoBind="100"
selectorTimeout="5000" \\选择期的超时时长
maxThreads="6"/> \\最大线程数 <Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter"> \\发送会话的机制，使用复制模式
<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" \\定义数据过滤信息
filter=""/>
<Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/> <Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer" \\自动调用部署器部署集群
tempDir="/tmp/war-temp/"
deployDir="/tmp/war-deploy/"
watchDir="/tmp/war-listen/"
watchEnabled="false"/> <ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/> \\集群的监听器
<ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
</Cluster> <Host name="www.jevon2.com" appBase="/data/webapps" unpackWARs="true" autoDeploy="true" >
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="jevon_access_log" suffix=".log"
pattern="%h %l %u %t &quot;%r&quot; %s %b" />
</Host>
[root@tomcatB ~]# cp /etc/tomcat/web.xml /data/webapps/ROOT/WEB-INF/
[root@tomcatB ~]# cd /data/webapps/ROOT/WEB-INF/
[root@tomcatB WEB-INF]# vim web.xml
在<web-app区域中添加<distributable/> 元素，如下
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<distributable/>
[root@tomcatA tomcat]# systemctl start tomcat

Nginx代理

代理服务器

[root@danran ~]# vim /etc/nginx/nginx.conf
http {
upstream appsrvs {
server www.jevon1.com:8080;
server www.jevon2.com:8080;
}
server {
listen 80;
server_name www.danran.com;
index index.jsp index.html;
root /usr/share/nginx/html;
location / {
proxy_pass http://appsrvs/;
}
}
}
[root@danran ~]# systemctl start nginx