Nginx 实现简单的负载均衡

 Nginx  实现简单的负载均衡

 

架构

      

 Nginx负载均衡器：192.168.14.128

WEB服务器：192.168.14.23，192.168.14.24 （采用nfs 文件存放站点，或者也可以各自存放通过sync之类同步）

Mysql: 后端，可以通过主从之类分担

 

安装nginx:

前置：

 

yum -y install pcre pcre-devel openssl-devel zlib-devel gcc gcc-c++

wget http://blog.s135.com/soft/linux/nginx_php/pcre/pcre-8.10.tar.gz

tar zxvf pcre-8.10.tar.gz

cd pcre-8.10/

./configure

make && make install

cd ../

tar zxvf nginx-1.2.6.tar.gz

cd nginx-1.2.6/

./configure --user=www --group=www --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module

make && make install

cd ../

备份初始配置

 

mv /usr/local/nginx/conf/nginx.conf /usr/local/nginx/conf/nginx.conf.bak

创建配置文件

 

vim /usr/local/nginx/conf/nginx.conf

 

user  www www;

worker_processes 8;



error_log  /usr/local/nginx/logs/nginx_error.log  crit;

pid        /usr/local/nginx/logs/nginx.pid;



worker_rlimit_nofile 51200;

events

{

    use epoll;

    worker_connections 51200;

}

http

{

    include       mime.types;

    default_type  application/octet-stream;

    #charset  gb2312;



    server_names_hash_bucket_size 128;

    client_header_buffer_size 32k;

    large_client_header_buffers 4 32k;



    sendfile on;

    tcp_nopush     on;

    keepalive_timeout 60;



    tcp_nodelay on;

#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;

upstream  www.test.com  {

        server   192.168.14.24:80;

        server   192.168.14.23:80;

    }





 #定义日志格式

        log_format  access  '$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 localhost;



        #后端的Web服务器可以通过X-Forwarded-For获取用户真实IP

        proxy_set_header   X-Forwarded-For  $remote_addr;



  location / {

        root /data0/data_www/www.test.com;

        index index.html index.htm index.php;

        proxy_set_header Host $host;

        proxy_set_header X-Real-IP $remote_addr;

        proxy_pass http://www.test.com;

        proxy_redirect off;

        access_log  /usr/local/nginx/logs/access.log  access;

   }

}

}

 访问www.test.com

 

测试是否生效 ，在23 和24两台上分别建立相同文件index.html 内容分别为192.168.14.23

192.168.30.24

 

访问相同域名 得到不同内容