Nginx负载均衡与反向代理的配置实例

user  www www;

worker_processes 10;

error_log  /data1/logs/nginx_error.log  crit;

pid        /usr/local/webserver/nginx/nginx.pid;

worker_rlimit_nofile 51200;

events
{
 use epoll;
 worker_connections 51200;
}

http
{
 include       mime.types;
 default_type  application/octet-stream;

 #charset  utf-8;

 server_names_hash_bucket_size 128;
 client_header_buffer_size 32k;
 large_client_header_buffers 4 32k;

 sendfile on;
 #tcp_nopush     on;

 keepalive_timeout 65;

 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 1.1;
 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;

 #允许客户端请求的最大单个文件字节数
 client_max_body_size     300m;

 #缓冲区代理缓冲用户端请求的最大字节数，可以理解为先保存到本地再传给用户
 client_body_buffer_size  128k;

 #跟后端服务器连接的超时时间_发起握手等候响应超时时间
 proxy_connect_timeout    600;

 #连接成功后_等候后端服务器响应时间_其实已经进入后端的排队之中等候处理
 proxy_read_timeout       600;

 #后端服务器数据回传时间_就是在规定时间内后端服务器必须传完所有的数据
 proxy_send_timeout       600;

 #代理请求缓存区_这个缓存区间会保存用户的头信息以供Nginx进行规则处理_一般只要能保存下头信息即可
 proxy_buffer_size        16k;

 #同上 告诉Nginx保存单个用的几个Buffer 最大用多大空间
 proxy_buffers            4 32k;

 #如果系统很忙的时候可以申请更大的proxy_buffers 官方推荐*2
 proxy_busy_buffers_size 64k;

 #proxy缓存临时文件的大小
 proxy_temp_file_write_size 64k;

 upstream php_server_pool {
   server   192.168.1.10:80 weight=4 max_fails=2 fail_timeout=30s;
   server   192.168.1.11:80 weight=4 max_fails=2 fail_timeout=30s;
   server   192.168.1.12:80 weight=2 max_fails=2 fail_timeout=30s;
 }

 upstream message_server_pool {
   server   192.168.1.13:3245;
   server   192.168.1.14:3245 down;
 }

 upstream bbs_server_pool {
   server   192.168.1.15:80 weight=1 max_fails=2 fail_timeout=30s;
   server   192.168.1.16:80 weight=1 max_fails=2 fail_timeout=30s;
   server   192.168.1.17:80 weight=1 max_fails=2 fail_timeout=30s;
   server   192.168.1.18:80 weight=1 max_fails=2 fail_timeout=30s;
 } 

 #第一个虚拟主机，反向代理php_server_pool这组服务器
 server
 {
   listen       80;
   server_name  www.yourdomain.com;

   location /
   {
         #如果后端的服务器返回502、504、执行超时等错误，自动将请求转发到upstream负载均衡池中的另一台服务器，实现故障转移。
         proxy_next_upstream http_502 http_504 error timeout invalid_header;
         proxy_pass http://php_server_pool;
         proxy_set_header Host  www.yourdomain.com;
         proxy_set_header X-Forwarded-For  $remote_addr;
   }

   access_log  /data1/logs/www.yourdomain.com_access.log;
 }

 #第二个虚拟主机
 server
 {
   listen       80;
   server_name  www1.yourdomain.com;

   #访问http://www1.yourdomain.com/message/***地址，反向代理message_server_pool这组服务器
   location /message/
   {
         proxy_pass http://message_server_pool;
         proxy_set_header Host  $host;
   }

   #访问除了/message/之外的http://www1.yourdomain.com/***地址，反向代理php_server_pool这组服务器
   location /
   {
         proxy_pass http://php_server_pool;
         proxy_set_header Host  $host;
         proxy_set_header X-Forwarded-For  $remote_addr;
   }

   access_log  /data1/logs/message.yourdomain.com_access.log;
 }

 #第三个虚拟主机
 server{
   listen	80;
   server_name  bbs.yourdomain.com *.bbs.yourdomain.com;

   location /
   {
         proxy_pass http://bbs_server_pool;
         proxy_set_header Host  $host;
         proxy_set_header X-Forwarded-For  $remote_addr;
   }

   access_log off;
 }
}