欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页

Nginx+tomcat负载均衡session问题解决 博客分类: nginx  

程序员文章站 2024-02-26 09:08:46
...
文章来源:http://hi.baidu.com/softsystem/blog/item/c7f5d42c3f0af13d349bf7bd.html

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!!