nginx配置文件详解

#用户 用户组
user www www;
#工作进程，根据硬件调整，有人说几核cpu，就配几个，我觉得可以多一点
worker_processes 5；
#错误日志
error_log logs/error.log;
#pid文件位置
pid logs/nginx.pid;
worker_rlimit_nofile 8192;
events {
		#工作进程的最大连接数量，根据硬件调整，和前面工作进程配合起来用，尽量大，但是别把cpu跑到100%就行
		worker_connections 4096;
		}
http {
	include conf/mime.types;
	#反向代理配置，可以打开proxy.conf看看
	include /etc/nginx/proxy.conf;
	#fastcgi配置，可以打开fastcgi.conf看看
	include /etc/nginx/fastcgi.conf;
	default_type application/octet-stream;
	#日志的格式
	log_format main '$remote_addr – $remote_user [$time_local] $status '
	'"$request” $body_bytes_sent “$http_referer"'
	'"$http_user_agent” “$http_x_forwarded_for"';
	#访问日志
	access_log logs/access.log main;
	sendfile on;
	tcp_nopush on;
	#根据实际情况调整，如果server很多，就调大一点
	server_names_hash_bucket_size 128; # this seems to be required for some vhosts
	#这个例子是fastcgi的例子，如果用fastcgi就要仔细看
	server { 
		# php/fastcgi
		listen 80;
		#域名，可以有多个
		server_name domain1.com www.domain1.com;
		#访问日志，和上面的级别不一样，应该是下级的覆盖上级的
		access_log logs/domain1.access.log main;
		root html;
		location / {
			index index.html index.htm index.php;
		}
		#所有php后缀的，都通过fastcgi发送到1025端口上
		#上面include的fastcgi.conf在此应该是有作用，如果你不include，那么就把fastcgi.conf的配置项放在这个下面。
		location ~ .php$ {
				fastcgi_pass 127.0.0.1:1025;
		}
}
#这个是反向代理的例子
server { # simple reverse-proxy
	listen 80;
	server_name domain2.com www.domain2.com;
	access_log logs/domain2.access.log main;
	#静态文件，nginx自己处理
	location ~ ^/(images|javascript|js|css|flash|media|static)/ {
			root /var/www/virtual/big.server.com/htdocs;
			#过期30天，静态文件不怎么更新，过期可以设大一点，如果频繁更新，则可以设置得小一点。
			expires 30d;
			}
	#把请求转发给后台web服务器，反向代理和fastcgi的区别是，反向代理后面是web服务器，fastcgi后台是fasstcgi监听进程，当然，协议也不一样。
	location / {
			proxy_pass http://127.0.0.1:8080;
			}
		}
#upstream的负载均衡，weight是权重，可以根据机器配置定义权重。据说nginx可以根据后台响应时间调整。后台需要多个web服务器。

upstream big_server_com {
		server 127.0.0.3:8000 weight=5;
		server 127.0.0.3:8001 weight=5;
		server 192.168.0.1:8000;
		server 192.168.0.1:8001;
		}
server {
		listen 80;
		server_name big.server.com;
		access_log logs/big.server.access.log main;
		location / {
				proxy_pass http://big_server_com;
				}
		}
}

user  nobody;# 事情历程的属主
worker_processes  4;# 事情历程数，一样平常与 CPU 核数等同
#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;
#pid        logs/nginx.pid;
events {
    use epoll;#Linux 下机能最好的 event 模式
    worker_connections  2048;# 每个事情历程许可最大的同时毗连数
}
http {
    include       mime.types;
    default_type  application/octet-stream;
    #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  off;
    access_log  logs/access.log;# 日记文件名
    sendfile        on;
    #tcp_nopush     on;
    tcp_nodelay     on;
    keepalive_timeout  65;
    include   gzip.conf;
    # 集群中的全部背景办事器的设置装备摆设信息
    upstream tomcats {
		  server 192.168.0.11:8080 weight=10;
		  server 192.168.0.11:8081 weight=10;
		  server 192.168.0.12:8080 weight=10;
		  server 192.168.0.12:8081 weight=10;
		  server 192.168.0.13:8080 weight=10;
		  server 192.168.0.13:8081 weight=10;
	    }
    server {
        listen       80;#HTTP 的端口
        server_name  localhost;
        charset utf-8;
        #access_log  logs/host.access.log  main;
  location ~ ^/NginxStatus/ {
     stub_status on; #Nginx 状况监控设置装备摆设
     access_log off;
  }
  location ~ ^/(WEB-INF)/ {
     deny all;
  }
  location ~ \.(htm|html|asp|php|gif|jpg|jpeg|png|bmp|ico|rar|css|js|
  zip|java|jar|txt|flv|swf|mid|doc|ppt|xls|pdf|txt|mp3|wma)$ {
             root /opt/webapp;
     expires 24h;
        }
        location / {
     proxy_pass http://tomcats;# 反向代办署理
     include proxy.conf;
        }
        error_page 404 /html/404.html;
        # redirect server error pages to the static page /50x.html
        #
  error_page 502 503 /html/502.html;
        error_page 500 504 /50x.html;
        location = /50x.html {
            root   html;
        }
    }
}

location / {
    proxy_pass        http://localhost:8080;
    proxy_set_header  X-Real-IP  $remote_addr;
}

location / {
    proxy_pass        http://tomcats;
    proxy_set_header  X-Real-IP  $remote_addr;
}