跨域(二级域)session共享

http://blog.csdn.net/luka2008/article/details/38385703


http://sjsky.iteye.com/blog/918768
apache+JK+tomcat负载均衡配置（windows）

http://jacky2007.iteye.com/blog/676347
基于nginx的tomcat负载均衡和集群

http://wenku.baidu.com/link?url=9p97uXEuj7KSToVLBNrBsoq8heRYM6MlA6ujKQMWkSrciTDuzKf88v3BaZp3feMAdxyQ1MSLNTtSpTVmHvbM1WUDmS1SoZ2Gdcg-3Ho7K3i

Nginx+Tomcat+Redis实现负载均衡、资源分离、session共享  CentOS安装Nginx
http://centoscn.com/CentosServer/www/2013/0910/1593.html CentOS安装Tomcat
http://blog.csdn.net/zhuying_linux/article/details/6583096 CentOS安装Redis
http://www.cnblogs.com/zhuhongbao/archive/2013/06/04/3117997.html 多个Tomcat负载均衡实例：可在服务器上复制出多个Tomcat分别修改Tomcat的 http访问端口（默认为8080端口）

  Shutdown端口（默认为8005端口）

  JVM启动端口（默认为8009端口）

  1、Nginx实现多Tomcat负载均衡
Tomcat服务

192.168.1.177:8001
192.168.1.177:8002 192.168.1.177:8003
Nginx配置
upstream mytomcats {    server 192.168.1.177:8001;   server 192.168.1.177:8002;   server 192.168.1.177:8003;   }


server {
   listen 80; 
  server_name www.iu14.com;   location ~* \.(jpg|gif|png|swf|flv|wma|wmv|asf|mp3|mmf|zip|rar)$ {   
      
root /web/www/html/;    } 
  location / { 
    
     proxy_pass http://mytomcats;           proxy_redirect off;          
proxy_set_header Host $host;            proxy_set_header X-Real-IP $remote_addr;            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;           client_max_body_size 10m;           client_body_buffer_size 128k;           proxy_connect_timeout 90;           proxy_send_timeout 90;           proxy_read_timeout 90;           proxy_buffer_size 4k;           proxy_buffers 4 32k;            proxy_busy_buffers_size 64k;           proxy_temp_file_write_size 64k;   } }  upstream指定负载均衡组，指定其Tomcat成员  location ~* \.(jpg|gif|……实现了静态资源分离。ps：在location指令使用正则表达式后再用alias指令，Nginx是不支持的。 2、Nginx实现静态资源分离 Tomcat服务 192.168.1.177:8000 Nginx配置  server {    listen 80;    server_name www.iu14.com;   root /web/www/html;  location /img/ {    alias /web/www/html/img/;   }  location ~ (\.jsp)|(\.do)$ {


proxy_pass http://192.168.1.177:8000;
  proxy_redirect off;    
       proxy_set_header Host $host;    
   
   proxy_set_header X-Real-IP $remote_addr;  
    
 
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; 
 

  
  
client_max_body_size 10m; 
         client_body_buffer_size 128k; 
         proxy_connect_timeout 90;    proxy_send_timeout 90;   proxy_read_timeout 90;            proxy_buffer_size 4k;           proxy_buffers 4 32k;            proxy_busy_buffers_size 64k;           proxy_temp_file_write_size 64k;    }    }  第一个location指令将/web/www/html/img/目录下的静态文件交给Nginx来完成。最后一个location指令将所有以.jsp、.do结尾的文件都交给Tomcat服务器的8080端口来处理。  3、Nginx+Tomcat+Redis实现session共享 Redis服务  192.168.1.178:6379 Tomcat服务 192.168.1.177:8001 192.168.1.177:8002 192.168.1.177:8003 Nginx服务 192.168.1.179  配置Tomcat让其session保存到redis上，在context.xml配置(Value标签一定要在Manager标签前面)：

配置Nginx
upstream mytomcats { 
  server 192.168.1.177:8001;   server 192.168.1.177:8002;   server 192.168.1.177:8003;   }  log_format www_iu14_com '$remote_addr - $remote_user [$time_local] $request ' '"$status" $body_bytes_sent "$http_referer"'  '"$http_user_agent" "$http_x_forwarded_for"';   server {  listen  80;    server_name www.iu14.com;        location / {            proxy_pass http:// mytomcats;           proxy_set_header Host $host;            proxy_set_header X-Real-IP $remote_addr;            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;    }    access_log /usr/tmp/logs/redis.iu14.log www_iu14_com;   }    依次启动Redis、Tomcat、Nginx，访问Nginx