nginx ——redhat5.5 实现负载均衡

nginx负载均衡配置

1物理环境

192.168.221.129	Redhat5.5	nginx-0.7.69稳定版
192.168.221.130	Redhat5.5	nginx-0.7.69稳定版

2.安装环境

两台机器均选装nginx

先安装nginx 依赖包

yum install -y gcc openssl-devel pcre-develzlib-devel

有的说光盘没有自带pcre-devel包，但是我的redhat5.5版本带了这个包

下载nginx包

wget http://nginx.org/download/nginx-0.7.69.tar.gz

tar -zxvf nginx-0.7.69.tar.gz

cd nginx-0.7.69

./configure --with-http_stub_status_module--prefix=/opt/nginx

 安装了http_stub模块，并讲包安装在了/opt/nginx目录下，默认好像转载/usr下面的

make

make install

cd /opt/nginx/conf

剩下关键就是配置nginx.conf 这个配置文件了

3.修改配置文件

分别在每台机器的/var/www/html目录下放个index.html文件以便安装好了之后测试测试负载均衡

 

192.168.221.129 机器要做web服务器，还要做nginx负载均衡的代理服务器，所以，80端口用来做web，81端口用来做代理服务器。

192.168.221.129 /opt/nginx/conf/nginx.conf 文件配置

[root@localhost ~]# cat  /opt/nginx/conf/nginx.conf

 

user nobody nobody;

worker_processes  1;

 

#error_log logs/error.log;

error_log logs/error.log  notice;

#error_log logs/error.log  info;

 

pid       logs/nginx.pid;

 

worker_rlimit_nofile 65535;

events {

   use epoll;

   worker_connections  65536;

}

 

 

http {

   include       mime.types;

   default_type application/octet-stream;

 

   log_format  main  '$remote_addr - $remote_user [$time_local]"$request" '

                      '$status $body_bytes_sent"$http_referer" '

                     '"$http_user_agent"';

   

   log_format download '$remote_addr - $remote_user [$time_local]"$request" '

                      '$status $body_bytes_sent"$http_referer" '

                     '"$http_user_agent" "$http_x_forwarded_for"'

                      '"$http_range""$sent_http_content_range"';

 

   client_max_body_size  20m;

   client_header_buffer_size  32k;

   large_client_header_buffers 4 32k;

   

   access_log  logs/access.log  main;

 

   sendfile        on;

   tcp_nopush      on;

   tcp_nodelay     on;

   #keepalive_timeout  0;

   keepalive_timeout  65;

   client_header_timeout 10;

   client_body_timeout  10;

   send_timeout       10;

 

   #gzip  on;

   server {

       listen       80;

       server_name  192.168.221.129;

       index index.html index.htm;

       root /var/www/html;

       charset gb2312;

       access_log logs/host.access.log  main;

 

 

       error_page   500 502 503 504  /50x.html;

       location = /50x.html {

           root   html;

       }

    }

 

   server {

       listen       80;

       server_name  192.168.221.130;

       index index.html index.htm;

       root /var/www/html;

       charset gb2312;

       access_log logs/host.access.log  main;

 

 

       error_page   500 502 503 504  /50x.html;

       location = /50x.html {

           root   html;

       }

    }

 

   upstream 192.168.221.129 {

       server 192.168.221.129:80;

       server 192.168.221.130:80;

    }

 

   server {

       listen       81;

       server_name  192.168.221.129;

       access_log logs/host.access.log  main;

 

       location / {

           proxy_pass http://192.168.221.129;

#          include    /opt/nginx/conf/proxy.conf;

           proxy_set_header   Host             $host; 

           proxy_set_header   X-Real-IP        $remote_addr; 

           proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;

       }

 

       error_page   500 502 503 504  /50x.html;

    }

 

  

}

 

 

192.168.221.130 /opt/nginx/conf/nginx.conf 文件配置

 

[root@localhost ~]# cat/opt/nginx/conf/nginx.conf

 

user nobody nobody;

worker_processes  1;

 

#error_log logs/error.log;

error_log logs/error.log  notice;

#error_log logs/error.log  info;

 

pid       logs/nginx.pid;

 

worker_rlimit_nofile 65535;

events {

   use epoll;

   worker_connections  65536;

}

 

 

http {

   include       mime.types;

   default_type application/octet-stream;

 

   log_format  main  '$remote_addr - $remote_user [$time_local]"$request" '

                      '$status $body_bytes_sent"$http_referer" '

                     '"$http_user_agent"';

   

   log_format download '$remote_addr - $remote_user [$time_local]"$request" '

                      '$status $body_bytes_sent"$http_referer" '

                     '"$http_user_agent" "$http_x_forwarded_for"'

                      '"$http_range""$sent_http_content_range"';

 

   client_max_body_size  20m;

   client_header_buffer_size  32k;

   large_client_header_buffers 4 32k;

   

   access_log  logs/access.log  main;

 

   sendfile        on;

   tcp_nopush      on;

   tcp_nodelay     on;

   #keepalive_timeout  0;

   keepalive_timeout  65;

   client_header_timeout 10;

   client_body_timeout  10;

   send_timeout       10;

 

   #gzip  on;

 

 

   server {

       listen       80;

       server_name  192.168.221.130;

       index index.html index.htm;

       root /var/www/html;

       charset gb2312;

       access_log logs/host.access.log  main;

 

 

       error_page   500 502 503 504  /50x.html;

       location = /50x.html {

           root   html;

       }

    }

 

}

可以用 /opt/nginx/sbin/nginx -t 来检查语法错误

[root@localhost ~]# /opt/nginx/sbin/nginx-t

the configuration file/opt/nginx/conf/nginx.conf syntax is ok

[warn]: 65536 worker_connections are morethan open file resource limit: 65535

configuration file/opt/nginx/conf/nginx.conf test is successful

 

/opt/nginx/sbin/nginx  启动nginx服务

kill 找到进程杀死，就是关闭了，

[root@localhost ~]# ps -ef |grep nginx

root    13325     1  017:20 ?        00:00:00 nginx: masterprocess ../sbin/nginx

nobody  13326 13325  0 17:20 ?        00:00:00 nginx: worker process

root    13649 13607  0 18:30 pts/2    00:00:00 grep nginx

 

 

试用了下简单的功能，还有许多功能没配

图示可以看出通过访问代理192.168.221.129的81好端口，负载均衡到了服务器192.168.221.129：80 和192.168.221.130：80的web端口。