高并发设计、nginx负载均衡与反向代理

nginx负载均衡

#《实例：负载均衡》
#$time_iso8601 ISO8601标准格式下的本地时间 2017-08-30T09:16:15+08:00。
#user  nobody;
worker_processes  1; #工作的子进程数量（通常等于CPU数量或者2倍于CPU）  

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;  #单个进程最大连接数（最大连接数=连接数*进程数）
}


http {
    include       mime.types;  #文件扩展名与文件类型映射表
    default_type  application/octet-stream; #默认文件类型  

    #log_format  main  '$remote_addr $remote_user $time_local $request '
    #                  '$status $body_bytes_sent $http_referer '
    #                  '$http_user_agent $http_x_forwarded_for';

    # log_format  main  '$remote_addr  $request  $time_local  $request_body  $http_referer  $http_user_agent'
    #			'$upstream_http_x_uuid  $upstream_http_host  $http_[HEADER_NAME] $http_search_engines $msec';

    #$query_string 请求 URI中的参数，与 $args相同
    #$args HTTP   请求中的完整参数。
    #$request_uri 表示客户端发来的原始请求URI，带完整的参数。$uri和$document_uri未必是用户的原始请求，在内部重定向后可能是重定向后的URI，
    #             而$request_uri 永远不会改变，始终是客户端的原始URI.
    #$uri         表示当前请求的URI，不带任何参数
    #$host        表示客户端请求头部中的Host字段。如果Host字段不存在，则以实际处理的server（虚拟主机）名称代替。如果Host字段中带有端口，如IP:PORT，那么$host是去掉端口的，
    #              它的值为IP。$host 是全小写的。这些特性与http_HEADER中的http_host不同，http_host只取出Host头部对应的值。
    #$http_cookie  $X-Forwarded-For
    
    #配置格式main的log=================================================================================
    log_format  main  '$remote_addr  $time_local  $http_user_agent  $http_referer  $args  $http_x_forwarded_for';
    
    #使用格式为main的log
    access_log  logs/access.log  main;
    #配置格式main的log=================================================================================
    

    #log_format up_head '$remote_addr  [$time_local]  $request  $upstream_http_content_type';
    #access_log  logs/access.log up_head;
    
    sendfile        on; #开启高效文件传输模式
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65; #长连接超时时间，单位是秒

    gzip  on; #启用Gizp压缩

    #limit_conn_zone $binary_remote_addr zone=perip:1m;
    #limit_conn_zone $server_name zone=perserver:1m;
    
    #服务器的集群（负载均衡：tomcat） https://my.oschina.net/u/2246410/blog/618798
    #netitcast.com 集群名称
    #upstream netitcast.com {
        #server 127.0.0.1:80  weight=2; #服务器配置
	#server 127.0.0.1:28080  weight=1;
    
   # }
  

    server {
        client_max_body_size 4G;
        listen       8081;  #监听80端口，可以改成其他端口
	server_name  localhost; #当前服务的域名 
        #charset koi8-r;

        #access_log  logs/host.access.log  main;
        location / {
            root   html;
            index  index.html index.htm;

        }
	location ~ .*\.(bmp|swf|css|js)$ {
		root    html;
		access_log off;
		expires 0s;
		
        }

	location ~ .*\.(gif|jpg|jpeg|png)$ {
		root    html;
			expires 0s;
	
	}
	set $uid "-";
        if ( $http_cookie ~* "uid=(\S+)(;.*|$)"){
            set $uid $1; 
        }
	





    #集群负载均衡
    #location / {
	#    proxy_pass http://netitcast.com;
	#    proxy_redirect default;
      #  }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   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
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

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


    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}


    # HTTPS server
    #
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}

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