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  • nginx负载均衡实现

    一、拓扑

     

    二、安装软件

    wget http://nginx.org/download/nginx-1.0.11.tar.gz
    wget ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.21.tar.gz

           1、安装pcre

                 tar zxvf pcre-8.21.tar.gz 
                 cd pcre-8.21
                ./configure 
                 make && make install

           2、安装nginx

                 tar zxvf nginx-1.0.11.tar.gz 
                 cd nginx-1.0.11
                 useradd -s /sbin/nologin www
               ./configure --user=www --group=www --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module
               make
               make install

    三、配置nginx

               cd /usr/local/nginx/
               cp nginx.conf nginx.conf.bak

               vi nginx.conf
    ###############################################################################
    user www www;
    worker_processes 1;
    error_log   /usr/local/nginx/logs/nginx_error.log crit;
    pid        /usr/local/nginx/nginx.pid;
    worker_rlimit_nofile 51200;
    ##############################################################################
    events{
         use epoll;
         worker_connections 51200;
    }
    ##############################################################################
    http{
        include       mime.types;
        default_type  application/octet-stream;
        sendfile on;
        tcp_nopush on;
        keepalive_timeout 60;
        tcp_nodelay on;

    ##############################################################################
    upstream   192.168.1.250 {
        server 192.168.1.251;
        server 192.168.1.252;
    }
    ##############################################################################
    server

       listen 80;
       server_name www.test.com *.test.com;

             location / {
                            proxy_pass        http://192.168.1.250;

                            proxy_set_header   Host             $host;

                            proxy_set_header   X-Real-IP        $remote_addr;

                            proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
    }
             location /nginx_status {
                           stub_status on;
                           access_log off;
                           allow 192.168.1.253;
                           deny all;
    }

    ###############################################################################
    log_format www_test_com  '$remote_addr - $remote_user [$time_local] $request '

                             '"$status" $body_bytes_sent "$http_referer" '

                             '"$http_user_agent" "$http_x_forwarded_for"';
    access_log  /usr/local/nginx/logs/nginx.log  www_test_com;
     
      }

    }
    ################################################################################
     

    四、测试配置是否正常

          [root@linux-1 conf]# /usr/local/nginx/sbin/nginx -t
           nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
           nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful      

    ############################以上说明配置正确###################  

    五、启动和停止nginx负载均衡器

                  启动:

                   ulimit -SHn 51200
                   /usr/local/nginx/sbin/nginx

                   停止:

                   killall -9 nginx    ####注意nginx可以写脚本形式让它启动停止

    六、测试

           web1-------->ip:192.168.1.251------------>index.html------------->the is web1

            web2-------->ip:192.168.1.252------------>index.html------------->the is web2

            测试结果:

            

    七、简单的使用监控模块(没有像LVS的ipvsadm强大,只是简单的查看而已)

            http://192.168.1.250/nginx_status

           

    ##########################到些简单的负载配置完成#######################

    八、简单讲解配置文件(讲解有错误请指教):

            worker_processes 1;  ###一般配置跟CPU的数量一样
            error_log   /usr/local/nginx/logs/nginx_error.log crit;###nginx错误日志使用

            use epoll;###epoll模式
           worker_connections 51200; ###每个进程最大连接数51200个

          upstream   192.168.1.250 {
                server 192.168.1.251;
                server 192.168.1.252;
         } ###############这个就是负载了,下面的就是后端的源服务器
     

          location / {
                            proxy_pass        http://192.168.1.250;

                            proxy_set_header   Host             $host;

                            proxy_set_header   X-Real-IP        $remote_addr;

                            proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
    }##########后端源Web服务器通过X-Forwarded-For获取用户真实IP地址
     

     location /nginx_status {
                           stub_status on;
                           access_log off;
                           allow 192.168.1.253;
                           deny all;
    }############这个就是简单监控nginx的状态

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  • 原文地址:https://www.cnblogs.com/cnsanshao/p/2814146.html
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