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nginx负载均衡与反向代理

#运行用户
user  nobody nobody;

#启动进程
worker_processes  2;

#全局错误日志及PID文件
error_log  logs/error.log notice;
pid        logs/nginx.pid;

#工作 模式及连接数上限
events {
        use epoll;
        worker_connections      1024;
}

#设定http服务器,利用它的反向代理功能提供负载均衡支持
http {
        #设定mime类型
        include      conf/mime.types;
        default_type  application/octet-stream;

        #设定日志格式
        log_format main        '$remote_addr - $remote_user [$time_local] '
                                                '"$request" $status
$bytes_sent '
                                                '"$http_referer"
"$http_user_agent" '
                                                '"$gzip_ratio"';

        log_format download '$remote_addr - $remote_user [$time_local] '
                                                '"$request" $status
$bytes_sent '
                                                '"$http_referer"
"$http_user_agent" '
                                                '"$http_range"
"$sent_http_content_range"';

        #设定请求缓冲
        client_header_buffer_size    1k;
        large_client_header_buffers  4 4k;

        #开启gzip 模块
        gzip on;
        gzip_min_length  1100;
        gzip_buffers    4 8k;
        gzip_types      text/plain;

        output_buffers  1 32k;
        postpone_output  1460;

        #设定access log
        access_log  logs/access.log  main;

        client_header_timeout  3m;
        client_body_timeout    3m;
        send_timeout          3m;

        sendfile                on;
        tcp_nopush              on;
        tcp_nodelay            on;

        keepalive_timeout  65;

        #设定负载均衡的服务器列表
        upstream mysvr {
                #weigth参数表示权值,权值越高被分配到的几率越大
                #本机上的Squid开启3128端口
                #server 192.168.0.207:3128 weight=5;若加此句,则要启动squid
                server 192.168.0.201:80  weight=1;
                server 192.168.0.211:80  weight=6;
        }

        #设定虚拟主机
        server {
                listen          80;
                server_name    192.168.0.207 www.angle.org;

                charset gb2312;

                #设定本虚拟主机的访问日志
                access_log  logs/www.angle.org.access.log  main;

                #如果访问 /img/*, /js/*, /css/* 资源,则直接取 本地文件,不通过squid
                #如果这些文件较多,不推荐这种方式,因为通过squid的缓存效果更好
                #location ~ ^/(img|js|css)/  {
                #        root    /data3/Html;
                #        expires 24h;
                #}

                #对 "/" 启用负载均衡
                location / {
                        proxy_pass      http://mysvr;(此处指定上述upstream的命名)

                        proxy_redirect          off;
                        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;
                        client_body_buffer_size 128k;
                        proxy_connect_timeout  90;
                        proxy_send_timeout      90;
                        proxy_read_timeout      90;
                        proxy_buffer_size      4k;
                        proxy_buffers          4 32k;
                        proxy_busy_buffers_size 64k;
                        proxy_temp_file_write_size 64k;
                }

                #设定查看Nginx状态的地址
                location /NginxStatus {
                        stub_status            on;
                        access_log              on;
                        auth_basic              "NginxStatus";
                        auth_basic_user_file  conf/htpasswd;
                }
        }
}

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