Tomcat集群 session共享

小鱼儿 2022-11-04 14:26 230阅读 0赞

### 文章目录 ###

*  1, 配置tomcat session nonsticky
 *   *  1.1 配置tomcat: conf/context.xml
 *  2, 测试用户登录
 *   *  2.1 自带的servlets样例测试
     *  2.2 自带的manager登录页面测试

*  使用场景： 用web服务器代理后台多个tomcat, 做负载均衡，有用户重复登录的问他，原因在于session 没有共享

# 1, 配置tomcat session nonsticky #

配置参考：[https://github.com/magro/memcached-session-manager/wiki/SetupAndConfiguration][https_github.com_magro_memcached-session-manager_wiki_SetupAndConfiguration]

*  添加jar包: memcached-session-manager (两个： [一个基本模板包][Link 1]，[一个tomcat版本包][tomcat] ）
 *  添加jar包: [spymemcached包][spymemcached] 或 [jedis包][jedis] (取决于：使用哪种缓存数据库）  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70]

## 1.1 配置tomcat: conf/context.xml ##

[root@c7-docker conf]# cat context.xml
    <?xml version="1.0" encoding="UTF-8"?>
        
         <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
    	    memcachedNodes="n1:localhost:11211,n2:localhost:11212"
    	    sticky="false"
    	    sessionBackupAsync="false"
    	    requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$" />         
    </Context>
    
    
    [root@c7-docker conf]# ls ../lib/|egrep 'mem|jedi'
    jedis-3.0.0.jar
    memcached-session-manager-2.3.2.jar
    memcached-session-manager-tc8-2.3.2.jar
    spymemcached-2.12.3.jar

# 2, 测试用户登录 #

## 2.1 自带的servlets样例测试 ##

[http://192.168.56.117:8090/examples/servlets/servlet/SessionExample][http_192.168.56.117_8090_examples_servlets_servlet_SessionExample]  
查看session信息是否一致（ id, 创建时间)  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70 1]

## 2.2 自带的manager登录页面测试 ##

配置tomcat用户和权限，来访问manager页面，参考：[https://blog.csdn.net/eyeofeagle/article/details/105864895][https_blog.csdn.net_eyeofeagle_article_details_105864895]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70 2]  
httpd 代理 tomcat集群：[https://blog.csdn.net/eyeofeagle/article/details/114259928][https_blog.csdn.net_eyeofeagle_article_details_114259928]

[root@c7-docker ~]# cat /etc/httpd/conf.d/a.conf
    Listen 83
    <proxy balancer://ajp_tom_cluster>
      BalancerMember ajp://192.168.56.117:8010   loadfactor=10
      BalancerMember ajp://192.168.56.6:8009 	 loadfactor=10
    </proxy>
    <VirtualHost *:83>
      ProxyRequests Off
      ErrorLog "logs/83-error_log"
      CustomLog "logs/83-access_log" common
      ProxyPass 	   / balancer://ajp_tom_cluster/
      ProxyPassReverse / balancer://ajp_tom_cluster/
      Header set Access-Control-Allow-Origin *
    </VirtualHost>

测试过程：

*  第一：先启动一个TomcatA, 测试正常登录并显示出状态信息
 *  第二：停止TomcatA, 启动TomcatB, 刷新页面看是否正常显示（如果一切照常，不弹出登录页面就说明配置是成功的）  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70 3]

[https_github.com_magro_memcached-session-manager_wiki_SetupAndConfiguration]: https://github.com/magro/memcached-session-manager/wiki/SetupAndConfiguration
[Link 1]: https://repo1.maven.org/maven2/de/javakaffee/msm/memcached-session-manager/
[tomcat]: https://repo1.maven.org/maven2/de/javakaffee/msm/
[spymemcached]: https://repo1.maven.org/maven2/net/spy/spymemcached/2.12.3/
[jedis]: https://repo1.maven.org/maven2/redis/clients/jedis/3.0.0/jedis-3.0.0.jar
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70]: /images/20221023/2b457e82eafb4b7098002b734e38b6ce.png
[http_192.168.56.117_8090_examples_servlets_servlet_SessionExample]: http://192.168.56.117:8090/examples/servlets/servlet/SessionExample
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70 1]: /images/20221023/baa7603aff824faf862e55a3be552c6f.png
[https_blog.csdn.net_eyeofeagle_article_details_105864895]: https://blog.csdn.net/eyeofeagle/article/details/105864895
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70 2]: /images/20221023/48b40e814c4f455093eea5a9e296f5d2.png
[https_blog.csdn.net_eyeofeagle_article_details_114259928]: https://blog.csdn.net/eyeofeagle/article/details/114259928
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70 3]: /images/20221023/e76d2a4ccd3249d8bbbced5f4d366885.png