Nginx+tomcat负载均衡session问题解决

时间:2016-05-15 20:12 来源:linux.it.net.cn 作者:IT

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

       

        <br />

       <%out.print(request.getSession()) ;%>

       

        <br />

        <%out.println(request.getHeader("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！！

1.要先在Nginx安装目录里执行 patch -p0 < /opt/nginx_upstream_jvm_route/jvm_route.patch （我这里是在opt下放着） 2.安装时：--add-module=/opt/nginx_upstream_jvm_route/ 参数，你再试一下

(责任编辑：IT)