负载均衡

2017-03-22

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1、搭建lnmp环境

一、操作步骤

1.安装Nginx

1 2	sudo apt-get install update　　 sudo apt-get install nginx

2.测试Nginx，如果显示如下图则代表安装成功

#查看本机IP地址

1 2	curl http://127.0.0.1 或者 curl http://本机ip curl nginx

###3.安装MySQL

1	sudo apt-get install mysql-server

## 连续输入两次相同的密码

4.安装PHP

1	sudo apt-get install php5-fpm php5-mysql

5.配置PHP，修改php.ini文件

# 备份php.ini文件

1	cp /etc/php5/fpm/php.ini /etc/php5/fpm/php.ini.back

# 取消有安全隐患的pathinfo模式

1	vim /etc/php5/fpm/php.ini

# 将cgi.fix_pathinfo=1 设置为 cgi.fix_pathinfo=0

1	cgi.fix_pathinfo=0

#启动php-fpm

1	sudo service php5-fpm restart

###6.配置Nginx让其使用php-fpm进程

#备份/etc/nginx/sites-available/default文件

1	cp /etc/nginx/sites-available/default /etc/nginx/sites-available/default.back

#修改defalut文件内容如下

server {
   listen 80 default_server;
   listen [::]:80 default_server ipv6only=on;
   root /usr/share/nginx/html;
   index index.php index.html index.htm;
   server_name server_domain_name_or_IP;
   location / {
       try_files $uri $uri/ =404;
   }
   error_page 404 /404.html;
   error_page 500 502 503 504 /50x.html;
   location = /50x.html {
       root /usr/share/nginx/html;
   }
   location ~ \.php$ {
       try_files $uri =404;
       fastcgi_split_path_info ^(.+\.php)(/.+)$;
       fastcgi_pass unix:/var/run/php5-fpm.sock;
       fastcgi_index index.php;
       fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
       include fastcgi_params;
   }
}

7.重启nginx服务器

1	sudo service nginx restart

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<?php
    phpinfo();
?>

浏览器输入: http://ip/info.php
phpinfo显示

#2、nginx建立多站点

###有两种方式

一、在default中添加server，建多少站点添加多少server

在/etc/nginx/sites-available/default中：

    server{ 
       listen 80;<br>
       server_name www.html1.com;<br>
        root /usr/share/nginx/html1;<br>
       index index.php index.html index.htm;
   location / {
          try_files $uri $uri/ =404;
       }
}
   server{
       listen 80;
       server_name www.html1.com;<br>
        root /usr/share/nginx/html2;<br>
         index index.php index.html index.htm;<br>
       location / {             <br>
              try_files $uri $uri/ =404;   <br>
   
           }    <br>
}

二、软链接方式；

在/etc/nginx/sites-available/中复制default的文件在本目录下改文件名如：default1
软链接方式如下:
ln -s 到 /etc/nginx/sites-enabled/具体如下:

1	ln -s etc/nginx/sites-available/default1 /etc/nginx/sites-enabled/default1

最后root /usr/share/nginx/html2或root /usr/share/nginx/html1 里写文件。

3、nginx集群apache

在/etc/nginx/nginx.conf中修改配置

upstream myweb{<br>
        server 192.168.20.180;
        server 192.168.20.101;
        }
        server{
        listen 80;
        server_name www.whbimuyu.com;
        location / {
        index index.php index.htm;
        proxy_pass         http://myweb;
        proxy_set_header   Host             $host;
        proxy_set_header   X-Real-IP        $remote_addr;
        proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
        }
 }

4、动静分离