本文记录nginx+redis+tomcat实现session共享的过程
nginx安装：http://www.aiuxian.com/article/p-2617914.html
redis安装：http://www.aiuxian.com/article/p-2617912.html
准备两个tomcat，修改相应的端口
| 名称 | IP | 端口 | tomcat版本 | JDK |
| tomcat1 | 10.10.49.23 | 8080 | 7.0.40 | 1.7.0_25 |
| tomcat2 | 10.10.49.15 | 8081 | 7.0.40 | 1.7.0_25 |
1 | 1 |
修改nginx.conf加上：
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2 server 10.10.49.23:8080 max_fails=1 fail_timeout=10s;
3 server 10.10.49.15:8081 max_fails=1 fail_timeout=10s;
4 }
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2 root html;
3 index index.html index.htm;
4 proxy_pass http://backend;
5 }
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下载tomcat-redis-session-manager相应的jar包，主要有三个：
wget https://github.com/downloads/jcoleman/tomcat-redis-session-manager/tomcat-redis-session-manager-1.2-tomcat-7-java-7.jar
wget http://central.maven.org/maven2/redis/clients/jedis/2.5.2/jedis-2.5.2.jar
wget http://central.maven.org/maven2/org/apache/commons/commons-pool2/2.0/commons-pool2-2.0.jar
下载完成后拷贝到$TOMCAT_HOME/lib中
修改两tomcat的context.xml:
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3 <!-- Default set of monitored resources -->
4 <WatchedResource>WEB-INF/web.xml</WatchedResource>
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6 <!-- Uncomment this to disable session persistence across Tomcat restarts -->
7 <!--
8 <Manager pathname="" />
9 -->
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11 <!-- Uncomment this to enable Comet connection tacking (provides events
12 on session expiration as well as webapp lifecycle) -->
13 <!--
14 <Valve className="org.apache.catalina.valves.CometConnectionManagerValve" />
15 -->
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17 <Valve className="com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve" />
18 <Manager className="com.orangefunction.tomcat.redissessions.RedisSessionManager"
19 host="10.10.49.20"
20 port="6379"
21 database="0"
22 maxInactiveInterval="60" />
23</Context>
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2<html>
3 <head><title>TomcatA</title></head>
4 <body>
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6 <table align="centre" border="1">
7 <tr>
8 <td>Session ID</td>
9 <td><%= session.getId() %></td>
10 </tr>
11 <tr>
12 <td>Created on</td>
13 <td><%= session.getCreationTime() %></td>
14 </tr>
15 </table>
16 </body>
17</html>
18sessionID:<%=session.getId()%>
19<br>
20SessionIP:<%=request.getServerName()%>
21<br>
22SessionPort:<%=request.getServerPort()%>
23<%
24//为了区分，第二个可以是222
25out.println("This is Tomcat Server 1111");
26%>
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启动tomcat，发现有异常：com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve 类找不到
分别打开三个jar包，确实没有这个类，解决可以参考：
http://www.aiuxian.com/article/p-2001826.html
http://www.aiuxian.com/article/p-2001826.html
刷新：
可以看到虽然Server从1111变为2222，但session的创建时间没有变化，这就完成了session共享。
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