在后端的的tomcat之上通过组播的方式实现session的共享
实验架构图：
环境准备
#清空防火墙规则
iptables -F
iptables -X
#临时设置关闭selinux
setenforce 0
#安装jdk，centos7的源默认最高支持jdk1.8
yum -y install java-1.8.0-openjdk-devel
#更改主机名解析
vim /etc/hosts
192.168.8.161 tomcat2
192.168.8.160 tomcat1实验部署步骤：
配置Nginx
#安装并配置Nginx反向代理
[[email protected] ~]#yum -y instll nginx
#修改nginx配置文件
[[email protected] ~]#vim /etc/nginx/nginx.conf
user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;
include /usr/share/nginx/modules/*.conf;
events {
worker_connections 1024;
}
http {
log_format main ‘$remote_addr - $remote_user [$time_local] "$request" ‘
‘$status $body_bytes_sent "$http_referer" ‘
‘"$http_user_agent" "$http_x_forwarded_for"‘;
access_log /var/log/nginx/access.log main;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
include /etc/nginx/mime.types;
default_type application/octet-stream;
include /etc/nginx/conf.d/*.conf;
}
upstream web {
server 192.168.8.160:8080;
server 192.168.8.161:8080;
}
server {
listen 80 default_server;
index index.jsp;
location / {
proxy_pass http://web/;
}
}
#检查语法
[[email protected] ~]#nginx -t
#检查无误后启动nginx
[[email protected] ~]#systemctl start nginx配置tomcat1
#安装tomcat以及对应的其他管理工具
[[email protected] ~]#yum -y install tomcat tomcat-lib tomcat-admin-webapps tomcat-webapps tomcat-docs-webapp
#创建必要的文件夹
[[email protected] ~]#mkdir -pv /data/app/ROOT/{WEB-INF,META-INF,classes,lib}
[[email protected] ~]#vim /data/app/ROOT/index.jsp
<%@ page language="java" %>
<html>
<head><title>TomcatA</title></head>
<body>
<h1><font color="red">TomcatA</font></h1>
table align="centre" border="1">
<tr>
<td>Session ID</td>
<% session.setAttribute("www.zd.com","www.zd.com"); %>
<td><%= session.getId() %></td>
</tr>
<tr>
<td>Created on</td>
<td><%= session.getCreationTime() %></td>
</tr>
</table>
</body>
</html>
#编辑tomcat配置文件
[[email protected] ~]#vim /etc/tomcat/server.xml
<Host name="localhost" appBase="/data/app"
unpackWARs="true" autoDeploy="true">
<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"
#广播地址
address="228.0.100.4"
port="45564"
frequency="500"
dropTime="3000"/>
<Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver"
#本机能够监听的IP地址
address="192.168.8.160"
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>
<!-- SingleSignOn valve, share authentication between web applications
Documentation at: /docs/config/valve.html -->
<!--
<Valve className="org.apache.catalina.authenticator.SingleSignOn" />
-->
<!-- Access log processes all example.
Documentation at: /docs/config/valve.html
Note: The pattern used is equivalent to using pattern="common" -->
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="localhost_access_log." suffix=".txt"
pattern="%h %l %u %t "%r" %s %b" />
</Host>
#修改tomcat-users.xml配置文件
[[email protected] ~]#vim /etc/tomcat/tomcat-users.xml
<role rolename="admin-gui"/>
<role rolename="admin-script"/>
<role rolename="manager-gui"/>
<role rolename="manager-script"/>
<user username="tomcat" password="www.test.com" roles="manager-gui,manager-script,admin-gui,admin-script"/>
#拷贝web.xml文件
[[email protected] ~]#cp /etc/tomcat/web.xml /data/app/ROOT/WEB-INF/web.xml
<distributable/>
#启动tomcat服务
[[email protected] ~]#systemctl restart tomcat配置tomcat2
#创建必要的目录
[[email protected] ~]#mkdir /data
#从tomcat1上拷贝相关文件
[[email protected] ~]#scp -r /data/app/ 192.168.8.161:/data/
[[email protected] ~]#scp /etc/tomcat/server.xml 192.168.8.161:/etc/tomcat/server.xml
[[email protected] ~]#scp /etc/tomcat/tomcat-users.xml 192.168.8.161:/etc/tomcat/tomcat-users.xml
#编辑网页文件
[[email protected] ~]#vim /data/app/ROOT/index.jsp
<%@ page language="java" %>
<html>
<head><title>TomcatB</title></head>
<body>
<h1><font color="blue">TomcatB</font></h1>
table align="centre" border="1">
<tr>
<td>Session ID</td>
<% session.setAttribute("www.test.com","www.test.com"); %>
<td><%= session.getId() %></td>
</tr>
<tr>
<td>Created on</td>
<td><%= session.getCreationTime() %></td>
</tr>
</table>
</body>
</html>
#更改tomcat配置文件
[[email protected] ~]#vim /etc/tomcat/server.xml
<Host name="localhost" appBase="/data/app"
unpackWARs="true" autoDeploy="true">
<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"
#广播地址
address="228.0.100.4"
port="45564"
frequency="500"
dropTime="3000"/>
<Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver"
#本机能够监听的IP地址
address="192.168.8.161"
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>
<!-- SingleSignOn valve, share authentication between web applications
Documentation at: /docs/config/valve.html -->
<!--
<Valve className="org.apache.catalina.authenticator.SingleSignOn" />
-->
<!-- Access log processes all example.
Documentation at: /docs/config/valve.html
Note: The pattern used is equivalent to using pattern="common" -->
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="localhost_access_log." suffix=".txt"
pattern="%h %l %u %t "%r" %s %b" />
</Host>
#启动tomcat服务
[[email protected] ~]#systemctl restart tomcat测试tomcat1与tomcat2的8080端口是否启动
tomcat1
tomcat2
用Nginx代理进行测试
#刷新网页后session信息依然保持不变
原文地址：https://blog.51cto.com/14163901/2413472
时间： 2024-08-30 14:03:57