nginx简单的负载均衡配置

nginx配置如下

#user  nobody;
#启动进程，通常设置成和CPU的数量相等
worker_processes  1;
#全局错误日志及PID文件
error_log  /var/log/nginx/error.log;
pid /var/run/nginx.pid;

#工作模式及连接数上限
events {
    use epoll; #epoll是多路复用IO(I/O Multiplexing)中的一种方式可能提高nginx性能
    worker_connections  1024;#单个后台worker process进程的最大的并发连接数
}

#设计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minme类型，类型由mime.type文件定义
    include       mime.types;
    default_type  application/octet-stream;

    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" "$sent_http_content_range"';
	log_format post '$remote_addr - $remote_user [$time_local] '
        '"$request" $status $bytes_sent '
        '"$http_referer" "$http_user_agent" $content_type $http_accept_encoding'
        '"$gzip_ratio" $request_body';
    #设计日志格式
   	access_log /var/log/nginx/access.log;
	error_log /var/log/nginx/error.log;
    #sendfile 指令指定nginx是否调用sendfile函数(zero copy方式)输出文件
	#必须调为on,如果用来下载等应用磁盘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.
    sendfile        on;
    #tcp_nopush     on;
    #连接超时时间
    #keepalive_timeout  0;
    keepalive_timeout  65;
    #设定请求缓冲
   	client_header_buffer_size 32k;
	large_client_header_buffers 4 32k;
	#开永嘉gzip压缩
	gzip on;
	gzip_min_length 1100;
	gzip_buffers 4 8k;
	gzip_types text/plain text/css application/x-javascript application/json; 
	output_buffers 1 32k;
	postpone_output 1460;
	#设定负载均衡的服务器列表,backup代表备份服务器，只有当所有节点都没有返回时，才启用http://hillside.iteye.com/blog/703281
    upstream zxSrv{
		server 127.0.0.1:8080;
		server 127.0.0.1:8288;
	}
    server {
	    #侦听80端口
        listen       80;
		#侦听域名
        server_name  www.ruijinzhuangxiu.com;
        #设置编码
        charset utf-8;
        #设置本虚拟机的访问日志
        access_log  /var/log/nginx/8088.log  main;
        #设置转发机置
        location / {
          proxy_pass http://zxSrv;
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        # 设置错误页面
        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;
    #    }
    #}

}