admin 发表于 2019-10-21 15:52:00

Terracotta+Tomcat+nginx实现session的共享

环境准备：（Nginx,tomcat的安装部署本例不赘述。）         192.168.1.13     nginx         192.168.1.225    tomcat7，terracotta         192.168.1.226    tomcat7   部署terracotta+tomcat集群： 一：安装java程序至系统，配置java环境。# vi /etc/profile
export JAVA_HOME=/usr/local/javaexport PATH=/usr/local/java/bin:$PATH



二：部署单terracotta服务。下载terracotta：http://www.terracotta.org/downloads本例使用terracotta3.7.7版本，每个版本的部署配置略有不同。# tar -zxvf terracotta-3.7.7.tar.gz
# mv terracotta-3.7.7 /usr/local/terracotta
开启terracotta服务：
# /usr/local/terracotta/bin/start-tc-server.sh &


三：整合Tomcat，使之成为terracotta的客户端。复制terracotta的相关jar包到Tomcat的lib目录下：(tomcat家目录以$TOMCAT_HOME替代)# cp /usr/local/terracotta/common/terracotta-toolkit-1.6-runtime-5.7.0.jar $TOMCAT_HOME/lib/
# cp /usr/local/terracotta/sessions/terracotta-session-1.3.7.jar $TOMCAT_HOME/lib

修改context.xml文件，添加terracotta连接配置:# vi $TOMCAT_HOME/conf/context.xml
<ValveclassName="org.terracotta.session.TerracottaTomcat70xSessionValve"tcConfigUrl="192.168.1.225:9510"/>

集群中的Tomcat配置都基本如上。
四：配置nginx,使用loadblance方式访问后端tomcat。（具体的参考：https://bbs.cnblackhat.com/thread-2776-1-1.html）# vi/usr/local/nginx/conf/nginx
upstream  session{   
server 192.168.1.225:8080 weight=5 max_fails=2 fail_timeout=30s;   
server 192.168.1.226:8080 weight=5 max_fails=2 fail_timeout=30s;
}

server {   
listen 80 default_server;   
server_name 0.0.0.0;     
location /session    {     
proxy_passhttp://session;   
}
}


五：开启tomcat、nginx。# /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
# $TOMCAT_HOME/bin/startup.sh
# $TOMCAT_HOME/bin/startup.sh


六：session测试。在所有tomcat的session配置目录下，新建session测试页面。#vi test.jsp
<%@ pagesession="true" %>
<html>
<head>   
<title>test Host1</title><!-- //Host2就写为"test Host1" 以示区分 -->
</head>
<body>
<%   
out.println("SessionId:"+request.getSession().getId()+"<br />");    out.println("CreationTime:"+request.getSession().getCreationTime());     

Stringname=(String)session.getAttribute("name");   

if(name==null||name.equals("")){        
session.setAttribute("name","HelloHost1!"); //Host2就写为"Hello Host2!"      
out.println(session.getAttribute("name"));   
}else{        
out.println(name);   
}
%>
</body>
</html>


使用nginx跳转访问tomcat的test.jsp页面，效果如下：刷新页面多次，可以清楚看到页面是在两个tomcat之间互相跳转。SessionId除了最后的标识改变外，其余的都保持一直，且内容value一直都是HelloHost2。证明了页面的session id 与内容都保持了一直，session共享是生效的。   另外，还可以在terracotta服务器上开启监控工具，来查看集群状态：#/usr/local/terracotta/bin/dev-console.sh



Terracotta双机配置：部署两台Terracotta服务器，在Terracotta目录下，新建tc-config.xml#vi tc-config.xml
<?xmlversion="1.0" encoding="UTF-8"?>
<!--All content copyright Terracotta, Inc., unless otherwise indicated.  
    All rights reserved. -->
<tc:tc-config
xsi:schemaLocation="http://www.terracotta.org/schema/terracotta-5.xsd"
xmlns:tc="http://www.terracotta.org/config"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <servers>
    <!-- Sets where the Terracotta servercan be found. Replace the value
of          host with the server's IP address.-->
    <server host="192.168.1.225" name="Server1">
      <data>%(user.home)/terracotta/server-data</data>
     <logs>%(user.home)/terracotta/server-logs</logs>
    </server>
    <!-- If using a standby Terracottaserver, also referred to as an
ACTIVE-PASSIVEconfiguration, add the second server here. -->
    <server host="192.168.1.226" name="Server2">
     <data>%(user.home)/terracotta/server-data</data>
     <logs>%(user.home)/terracotta/server-logs</logs>
    </server>
<!--If using more than one server, add an <ha> section. -->
    <ha>
       <mode>networked-active-passive</mode>
       <networked-active-passive>
              <election-time>5</election-time>
       </networked-active-passive>
    </ha>
  </servers>
  <!-- Sets where the generated client logsare saved on clients. -->
  <clients>
    <logs>%(user.home)/terracotta/client-logs</logs>
  </clients>
</tc:tc-config>



然后分别用该配置文件，开启terratocca服务。#/bin/start-tc-server.sh-f /usr/local/terracotta/tc-config.xml -n Server1 &

#/bin/start-tc-server.sh-f /usr/local/terracotta/tc-config.xml -n Server2 &

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