Nginx配置文件各配置项详细说明

<code><span>#运行用户</span>
    user www-data;   
    <span>#启动进程,通常设置成和cpu的数量相等</span>
    worker_processes  <span>1</span>;

    <span>#全局错误日志及PID文件</span>
    error_log  /var/<span>log</span>/nginx/<span>error</span>.<span>log</span>;
    pid        /var/<span>run</span>/nginx.pid;

    <span>#工作模式及连接数上限</span>
    events {
        use   epoll;             <span>#epoll是多路复用IO(I/O Multiplexing)中的一种方式,但是仅用于linux2.6以上内核,可以大大提高nginx的性能</span>
        worker_connections  <span>1024</span>;<span>#单个后台worker process进程的最大并发链接数</span><span># multi_accept on;</span>
    }

    <span>#设定http服务器，利用它的反向代理功能提供负载均衡支持</span>
    http {
         <span>#设定mime类型,类型由mime.type文件定义</span>
        include       /etc/nginx/mime.types;
        default_type  <span>application</span>/octet-stream;
        <span>#设定日志格式</span>
        access_log    /var/<span>log</span>/nginx/access.<span>log</span>;

        <span>#sendfile 指令指定 nginx 是否调用 sendfile 函数（zero copy 方式）来输出文件，对于普通应用，</span><span>#必须设为 on,如果用来进行下载等应用磁盘IO重负载应用，可设置为 off，以平衡磁盘与网络I/O处理速度，降低系统的uptime.</span>
        sendfile        <span><span>on</span></span>;
        <span>#tcp_nopush     on;</span><span>#连接超时时间</span><span>#keepalive_timeout  0;</span>
        keepalive_timeout  <span>65</span>;
        tcp_nodelay        <span><span>on</span></span>;

        <span>#开启gzip压缩</span>
        gzip  <span><span>on</span></span>;
        gzip_disable <span>"MSIE [1-6]\.(?!.*SV1)"</span>;

        <span>#设定请求缓冲</span>
        client_header_buffer_size    <span>1</span>k;
        large_client_header_buffers  <span>4</span><span>4</span>k;

        include /etc/nginx/conf.d/*.conf;
        include /etc/nginx/sites-enabled/*;

        <span>#设定负载均衡的服务器列表</span>
         upstream mysvr {
        <span>#weigth参数表示权值，权值越高被分配到的几率越大</span><span>#本机上的Squid开启3128端口</span>
        server <span>192.168</span><span>.8</span><span>.1</span>:<span>3128</span> weight=<span>5</span>;
        server <span>192.168</span><span>.8</span><span>.2</span>:<span>80</span>  weight=<span>1</span>;
        server <span>192.168</span><span>.8</span><span>.3</span>:<span>80</span>  weight=<span>6</span>;
        }


       server {
        <span>#侦听80端口</span>
            listen       <span>80</span>;
            <span>#定义使用www.xx.com访问</span>
            server_name  www.xx.com;

            <span>#设定本虚拟主机的访问日志</span>
            access_log  logs/www.xx.com.access.<span>log</span>  main;

        <span>#默认请求</span>
        location / {
              root   /root;      <span>#定义服务器的默认网站根目录位置</span>
              index index.php index.html index.htm;   <span>#定义首页索引文件的名称</span>              fastcgi_pass  www.xx.com;
             fastcgi_param  SCRIPT_FILENAME  $document_root/$fastcgi_script_name;
              include /etc/nginx/fastcgi_params;
            }

        <span># 定义错误提示页面</span>
        error_page   <span>500</span><span>502</span><span>503</span><span>504</span> /<span>50</span>x.html; 
            location = /<span>50</span>x.html {
            root   /root;
        }

        <span>#静态文件，nginx自己处理</span>
        location ~ ^/(images|javascript|js|css|flash|media|static)/ {
            root /var/www/virtual/htdocs;
            <span>#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。</span>
            expires <span>30</span>d;
        }
        <span>#PHP 脚本请求全部转发到 FastCGI处理. 使用FastCGI默认配置.</span>
        location ~ \.php$ {
            root /root;
            fastcgi_pass <span>127.0</span><span>.0</span><span>.1</span>:<span>9000</span>;
            fastcgi_index index.php;
            fastcgi_param SCRIPT_FILENAME /home/www/www$fastcgi_script_name;
            include fastcgi_params;
        }
        <span>#设定查看Nginx状态的地址</span>
        location /NginxStatus {
            stub_status            <span><span>on</span></span>;
            access_log              <span><span>on</span></span>;
            auth_basic              <span>"NginxStatus"</span>;
            auth_basic_user_file  conf/htpasswd;
        }
        <span>#禁止访问 .htxxx 文件</span>
        location ~ /\.ht {
            deny all;
        }

         }
    }
</code>

<code><span><span>#设定http服务器，利用它的反向代理功能提供负载均衡支持</span>
    http {
         <span>#设定mime类型,类型由mime.type文件定义</span>
        include       /etc/nginx/mime.types;
        default_type  application/octet-stream;
        <span>#设定日志格式</span>
        access_log    /var/log/nginx/access.log;

        <span>#省略上文有的一些配置节点</span><span>#。。。。。。。。。。</span><span>#设定负载均衡的服务器列表</span>
         upstream mysvr {
        <span>#weigth参数表示权值，权值越高被分配到的几率越大</span><span>server</span><span>192.168</span><span>.8</span><span>.1</span>x:<span>3128</span> weight=<span>5</span>;<span>#本机上的Squid开启3128端口</span><span>server</span><span>192.168</span><span>.8</span><span>.2</span>x:<span>80</span>  weight=<span>1</span>;
        <span>server</span><span>192.168</span><span>.8</span><span>.3</span>x:<span>80</span>  weight=<span>6</span>;
        }

       upstream mysvr2 {
        <span>#weigth参数表示权值，权值越高被分配到的几率越大</span><span>server</span><span>192.168</span><span>.8</span>.x:<span>80</span>  weight=<span>1</span>;
        <span>server</span><span>192.168</span><span>.8</span>.x:<span>80</span>  weight=<span>6</span>;
        }

       <span>#第一个虚拟服务器</span><span>server</span> {
        <span>#侦听192.168.8.x的80端口</span>
            listen       <span>80</span>;
            server_name  <span>192.168</span><span>.8</span>.x;

          <span>#对aspx后缀的进行负载均衡请求</span>
        location ~ .*\.aspx$ {

             root   /root;      <span>#定义服务器的默认网站根目录位置</span><span>index</span><span>index</span>.php <span>index</span>.html <span>index</span>.htm;   <span>#定义首页索引文件的名称</span>              proxy_pass  http:<span>//mysvr ;#请求转向mysvr 定义的服务器列表</span><span>#以下是一些反向代理的配置可删除.</span>              proxy_redirect off;

              <span>#后端的Web服务器可以通过X-Forwarded-For获取用户真实IP</span>
              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 <span>10</span>m;    <span>#允许客户端请求的最大单文件字节数</span>
              client_body_buffer_size <span>128</span>k;  <span>#缓冲区代理缓冲用户端请求的最大字节数，</span>
              proxy_connect_timeout <span>90</span>;  <span>#nginx跟后端服务器连接超时时间(代理连接超时)</span>
              proxy_send_timeout <span>90</span>;        <span>#后端服务器数据回传时间(代理发送超时)</span>
              proxy_read_timeout <span>90</span>;         <span>#连接成功后，后端服务器响应时间(代理接收超时)</span>
              proxy_buffer_size <span>4</span>k;             <span>#设置代理服务器（nginx）保存用户头信息的缓冲区大小</span>
              proxy_buffers <span>4</span><span>32</span>k;               <span>#proxy_buffers缓冲区，网页平均在32k以下的话，这样设置</span>
              proxy_busy_buffers_size <span>64</span>k;    <span>#高负荷下缓冲大小（proxy_buffers*2）</span>
              proxy_temp_file_write_size <span>64</span>k;  <span>#设定缓存文件夹大小，大于这个值，将从upstream服务器传</span>           }

         }
    }</span></code>