lSky's blog

session共享之nginx+tomcat+redis

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环境
centos6.4
nginx :192.168.44.137
tomcat1 :192.168.44.137
tomcat2 :192.168.44.139
redis :192.168.44.137
相关安装包：http://download.csdn.net/detail/tshangshi/9644017
nginx在前端做负载均衡，转发给后端tomcat进行处理，session存在reids服务器，实现session共享

redis

1.安装redis

tar xvzf redis-stable.tar.gz

cd redis-stable

make

2.修改配置文件

vim redis.conf

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bind 192.168.44.137  #绑定的主机地址
daemonize yes		#以守护进程的方式运行

3.运行redis-server

cd src && ./redis-server ../redis.conf

Nginx做负载均衡

vim /etc/nginx/nginx.conf

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upstream mytest.com {
        server 192.168.44.137:8080;
        server 192.168.44.139:8080;
    }
    server {
        listen       80;
        server_name  www.nginx2.com;
        index index.jsp index.html index.htm;
        location / {
            proxy_redirect off;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header REMOTE-HOST $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_pass http://mytest.com;
            proxy_cookie_path /nginx2/ /;
        }

Tomcat

1.下载依赖jar包,放在 $TOMCAT_HOME/lib 目录下
tomcat-redis-session-manager-VERSION.jar
jedis-2.5.2.jar
commons-pool2-2.2.jar
2.context.xml（两个tomcat配置相同）

vim $TOMCAT_HOME/conf/context.xml

添加

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<Valve className="com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve" />
<Manager className="com.orangefunction.tomcat.redissessions.RedisSessionManager"  
        host="192.168.44.137"  
        port="6379"  
        database="0"  
        maxInactiveInterval="60" />

3.server.xml

vim $TOMCAT_HOME/conf/server.xml

tomcat1：

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<Engine name="Catalina" defaultHost="192.168.44.137" jvmRoute="tomcat1">
<Host name="192.168.44.137"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">
      <Context path="" reloadable="true" docBase="/opt/rtomcat/webapps/test/" />

tomcat2：

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<Engine name="Catalina" defaultHost="192.168.44.139" jvmRoute="tomcat2">
<Host name="192.168.44.139"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">
      <Context path="" reloadable="true" docBase="/opt/rtomcat/webapps/test/" />

4.测试页面 /opt/rtomcat/webapps/test/index.jsp

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<%@ page contentType="text/html; charset=UTF-8" %>
<%@ page import="java.util.*" %>
<html><head><title>Tomcat Cluster Demo</title></head>
<body>
Server Info:
<%
out.println(request.getLocalAddr() + " : " + request.getLocalPort()+"<br>");%>
<%
  out.println("<br> ID " + session.getId()+"<br>");
  String dataName = request.getParameter("dataName");
  if (dataName != null && dataName.length() > 0) {
     String dataValue = request.getParameter("dataValue");
     session.setAttribute(dataName, dataValue);
     System.out.println("application:" + application.getAttribute(dataName));
     application.setAttribute(dataName, dataValue);
  }
  out.print("<b>Session List</b>");
  Enumeration<String> e = session.getAttributeNames();
  while (e.hasMoreElements()) {
     String name = e.nextElement();
     String value = session.getAttribute(name).toString();
     out.println( name + " = " + value+"<br>");
         System.out.println( name + " = " + value);
   }
%>
    <form action="index.jsp" method="POST">
        Name:<input type=text size=20 name="dataName">
        <br>
        Value:<input type=text size=20 name="dataValue">
        <br>
        <input type=submit>
    </form>
</body>
</html>