Nginx+tomcat负载均衡session问题解决

测试环境:
server1   服务器上安装了  nginx + tomcat01
server2  服务器上只安装了 tomcat02          

server1  IP 地址: 192.168.2.88
server2  IP 地址: 192.168.2.89

安装步骤:
1. 在server1 上安装配置 nginx + nginx_upstream_jvm_route
shell $> wget -c http://sysoev.ru/nginx/nginx-0.7.61.tar.gz
shell $> svn checkout http://nginx-upstream-jvm-route.googlecode.com/svn/trunk/ nginx-upstream-jvm-route-read-only
shell $> tar zxvf  nginx-0.7.61
shell $> cd nginx-0.7.61
shell $> patch -p0 < ../nginx-upstream-jvm-route-read-only/jvm_route.patch
shell $> useradd www
shell $> ./configure --user=www --group=www --prefix=/usr/local//nginx --with-http_stub_status_module --with-http_ssl_module  --add-module=/root/nginx-upstream-jvm-route-read-only
shell $> make
shell $> make install

2.分别在两台机器上 安装 tomcat和java (略)
设置tomcat的server.xml, 在两台服务器的tomcat的配置文件中分别找到:
<Engine name="Catalina" defaultHost="localhost" >
分别修改为:
Tomcat01:
<Engine name="Catalina" defaultHost="localhost" jvmRoute="a">
Tomcat02:
<Engine name="Catalina" defaultHost="localhost" jvmRoute="b">
并在webapps下面建立aa文件夹,在里面建立要测试的index.jsp文件,内容如下:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
%>
<html>
  <head>
    </head>
      <body>
       88
       <!--server1  这里为 88 -->
        <br />
       <%out.print(request.getSession()) ;%>
       <!--输出session-->
        <br />
        <%out.println(request.getHeader("Cookie")); %>
      <!--输出Cookie-->
      </body>
</html>
两个tomcat一样只需要修改红色的部分
分别启动两个tomcat

3.设置nginx
shell $> cd /usr/local/nginx/conf
shell $> mv nginx.conf nginx.bak
shell $> vi nginx.conf
## 以下是配置 ###

user  www www;
worker_processes 4;
error_log  logs/nginx_error.log  crit;
pid        /usr/local/nginx/nginx.pid;
#Specifies the value for maximum file descriptors that can be opened by this process.
worker_rlimit_nofile 51200;
events
{
use epoll;
worker_connections 2048;
}
http
{
  upstream backend {
    server 192.168.2.88:8080 srun_id=a;  
    server 192.168.2.89:8080 srun_id=b;
    jvm_route $cookie_JSESSIONID|sessionid reverse;
  }

include       mime.types;
default_type  application/octet-stream;
#charset  gb2312;
charset UTF-8;
server_names_hash_bucket_size 128;
client_header_buffer_size 32k;
large_client_header_buffers 4 32k;
client_max_body_size 20m;
limit_rate  1024k;
sendfile on;
tcp_nopush     on;
keepalive_timeout 60;
tcp_nodelay on;
fastcgi_connect_timeout 300;
fastcgi_send_timeout 300;
fastcgi_read_timeout 300;
fastcgi_buffer_size 64k;
fastcgi_buffers 4 64k;
fastcgi_busy_buffers_size 128k;
fastcgi_temp_file_write_size 128k;
gzip on;
#gzip_min_length  1k;
gzip_buffers     4 16k;
gzip_http_version 1.0;
gzip_comp_level 2;
gzip_types       text/plain application/x-javascript text/css application/xml;
gzip_vary on;
#limit_zone  crawler  $binary_remote_addr  10m;
server
{
   listen       80;
   server_name  192.168.2.88;
   index index.html index.htm index.jsp;
   root  /var/www;

   #location ~ .*\.jsp$
   location  / aa/
  {
     proxy_pass  http://backend;
     proxy_redirect    off;
     proxy_set_header  X-Forwarded-For  $proxy_add_x_forwarded_for;
     proxy_set_header  X-Real-IP  $remote_addr;
     proxy_set_header  Host $http_host;
   }
   location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
   {
     expires      30d;
   }
   location ~ .*\.(js|css)?$
   {
     expires      1h;
   }
   location /Nginxstatus {
     stub_status on;
     access_log   off;
   }
  log_format  access  '$remote_addr - $remote_user [$time_local] "$request" '
             '$status $body_bytes_sent "$http_referer" '
             '"$http_user_agent" $http_x_forwarded_for';
#  access_log  off;
  }
}
4.测试
打开浏览器,输入:http://192.168.2.88/aa/
刷新了N次还都是88,也就是补丁起作用了,cookie 值 也获得了,为了测试,我又打开了 “遨游浏览器”(因为session 和 cookie问题所以从新打开别的浏览器),输入网址:
http://192.168.2.88/aa/
显示89,刷新N次后还是89,大家测试的时候如果有疑问可一把 nginx 配置文件的
srun_id=a  srun_id=b 去掉,然后在访问,就会知道 页面是轮询访问得了!!
posted @ 2009-10-26 12:32  与时俱进  阅读(4408)  评论(0编辑  收藏  举报
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