Nginx反向代理，负载均衡配置

主配置文件：nginx.conf

# For more information on configuration, see:
#   * Official English Documentation: http://nginx.org/en/docs/
#   * Official Russian Documentation: http://nginx.org/ru/docs/

user www;
worker_processes ;
error_log /var/log/nginx/error.log;
pid /var/run/nginx.pid;

# Load dynamic modules. See /usr/share/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;

events {
    worker_connections  102400;
}

http {
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile            on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;

    include             /etc/nginx/mime.types;
    default_type        application/octet-stream;

    # Load modular configuration files from the /etc/nginx/conf.d directory.
    # See http://nginx.org/en/docs/ngx_core_module.html#include
    # for more information.
    include /etc/nginx/conf.d/*.conf;
}

目录下 /etc/nginx/conf.d/one.conf

#
# The default server
#

upstream one_server{
    server 127.0.0.1: weight=;
    #server 127.0.0.1: weight=;
}

server {
    listen       ;
    server_name  one.server.com;

    #charset koi8-r;

    access_log  /data/logs/one.access.log  main;

    # Load configuration files for the default server block.
    include /etc/nginx/default.d/*.conf;

    location / {

        index  index.htm index.html;

        proxy_pass   http://one_server;    #在这里设置一个代理，和upstream的名字一样
        #以下是一些反向代理的配置可删除
        proxy_redirect             off;
        #后端的Web服务器可以通过X-Forwarded-For获取用户真实IP
        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; #允许客户端请求的最大单文件字节数
        client_body_buffer_size    128k; #缓冲区代理缓冲用户端请求的最大字节数
        proxy_connect_timeout      300; #nginx跟后端服务器连接超时时间(代理连接超时)
        proxy_send_timeout         300; #后端服务器数据回传时间(代理发送超时)
        proxy_read_timeout         300; #连接成功后，后端服务器响应时间(代理接收超时)
        proxy_buffer_size          4k; #设置代理服务器（nginx）保存用户头信息的缓冲区大小
        proxy_buffers              4 32k; #proxy_buffers缓冲区，网页平均在32k以下的话，这样设置
        proxy_busy_buffers_size    64k; #高负荷下缓冲大小（proxy_buffers*2）
        proxy_temp_file_write_size 64k;

    }

    error_page  404              /404.html;
    location = /404.html {
        root   /usr/share/nginx/html;
    }

    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }

    # proxy the PHP scripts to Apache listening on 127.0.0.1:80
    #
    #location ~ \.php$ {
    #    proxy_pass   http://127.0.0.1;
    #}

    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
    #

    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    #location ~ /\.ht {
    #    deny  all;
    #}
}

可以增加多个 one.conf 文件配置多个系统的负载均衡，反向代理

单独的图片服务器：img111.conf

#
# The default server
#
server {
    listen       ;
    server_name  img111.server.com;

    #charset koi8-r;

    #access_log  logs/host.access.log  main;

    # Load configuration files for the default server block.
    include /etc/nginx/default.d/*.conf;

    location / {
        root   /data/www/webapp/;
        index  index.html index.htm;
    }

    error_page  404              /404.html;
    location = /404.html {
        root   /usr/share/nginx/html;
    }

    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }

    # proxy the PHP scripts to Apache listening on 127.0.0.1:80
    #
    #location ~ \.php$ {
    #    proxy_pass   http://127.0.0.1;
    #}

    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
    #

    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    #location ~ /\.ht {
    #    deny  all;
    #}
}