Tomcat實現session會話保持（二）
在後端的的tomcat之上經過組播的方式實現session的共享
實驗架構圖：
實驗設備
操做系統：CentOS7.6 nginx IP：192.168.8.134 tomcat1 IP：192.168.8.160 tomcat2 IP：192.168.8.161
環境準備
#清空防火牆規則 iptables -F iptables -X #臨時設置關閉selinux setenforce 0 #安裝jdk，centos7的源默認最高支持jdk1.8 yum -y install java-1.8.0-openjdk-devel #更改主機名解析 vim /etc/hosts 192.168.8.161 tomcat2 192.168.8.160 tomcat1
實驗部署步驟：
配置Nginx
安裝並配置Nginx反向代理html
[root@nginx ~]#yum -y instll nginx
修改nginx配置文件java
[root@nginx ~]#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/;
}
}
檢查無誤後啓動nginxnode
[root@nginx ~]#nginx -t [root@nginx ~]#systemctl start nginx
配置tomcat1
安裝tomcat以及對應的其餘管理工具linux
[root@tomcat1 ~]#yum -y install tomcat tomcat-lib tomcat-admin-webapps tomcat-webapps tomcat-docs-webapp
建立必要的文件夾nginx
[root@tomcat1 ~]#mkdir -pv /data/app/ROOT/{WEB-INF,META-INF,classes,lib}
編輯網頁文件web
[root@tomcat1 ~]#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>
編輯tomcat配置文件apache
[root@tomcat1 ~]#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"
#廣播地址
address="228.0.100.4"
port="45564"
frequency="500"
dropTime="3000"/>
<Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver"
#本機可以監聽的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vim
[root@tomcat1 ~]#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"/>
拷貝web.xml文件後端
[root@tomcat1 ~]#cp /etc/tomcat/web.xml /data/app/ROOT/WEB-INF/web.xml [root@tomcat1 ~]#vim /data/app/ROOT/WEB-INF/web.xml #添加這一行 <distributable/>
啓動tomcat服務centos
[root@tomcat1 ~]#systemctl restart tomcat [root@tomcat1 ~]#systemctl enable tomcat
配置tomcat2
建立必要的目錄
[root@tomcat2 ~]#mkdir /data
從tomcat1上拷貝相關文件
[root@tomcat1 ~]#scp -r /data/app/ 192.168.8.161:/data/ [root@tomcat1 ~]#scp /etc/tomcat/server.xml 192.168.8.161:/etc/tomcat/server.xml [root@tomcat1 ~]#scp /etc/tomcat/tomcat-users.xml 192.168.8.161:/etc/tomcat/tomcat-users.xml
編輯網頁文件
[root@tomcat2 ~]#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
[root@tomcat2 ~]#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"
#廣播地址
address="228.0.100.4"
port="45564"
frequency="500"
dropTime="3000"/>
<Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver"
#本機可以監聽的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>
啓動tomcat服務
[root@tomcat2 ~]#systemctl restart tomcat [root@tomcat2 ~]#systemctl enable tomcat
測試tomcat1與tomcat2的8080端口是否啓動
tomcat1
tomcat2
用Nginx代理進行測試
#刷新網頁後session信息依然保持不變
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