nginx负载均衡

1.安装nginx

yum install yum-priorities -y  
wget http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm  
rpm -ivh nginx-release-centos-7-0.el7.ngx.noarch.rpm  
yum install nginx  

systemctl start nginx.service #启动nginx  
systemctl stop nginx.service #停止  
systemctl restart nginx.service #重启  
systemctl enable nginx.service #设置开机启动 

2.更改nginx端口号（根据自己需求）

cd /etc/nginx/conf.d/  
vim default.conf  
把listen 80改成listen 81

systemctl restart nginx.service #重启nginx  

3.访问http://ip:81即可看到nginx首页

4.下一步安装 php-fpm

yum install php-fpm 

systemctl start php-fpm.service #启动php-fpm
systemctl enable php-fpm.service #设置开机启动  

5.更改nginx配置文件识别php （vi /etc/nginx/conf.d/default.conf，把之前的#给去掉），顺便改一下fastcgi_param

    location ~ \.php$ {  
        root           html;  
        fastcgi_pass   127.0.0.1:9000;  
        fastcgi_index  index.php;  
        fastcgi_param  SCRIPT_FILENAME  /usr/share/nginx/html/$fastcgi_script_name;  
        include        fastcgi_params;  
    }  

6.测试nginx---

在 /usr/share/nginx/html中新建一个test.php  

访问http://ip:81/test.php即可看到nginx中的text.php输出的内容

7.负载配置

    upstream site{  
            server 172.16.170.138;  
            server 172.16.170.139;  
    }  
    server {  
        listen       80;  
        server_name  localhost;  
      
        #charset koi8-r;  
        #access_log  /var/log/nginx/log/host.access.log  main;  
      
        location / {  
            root   /usr/share/nginx/html;  
            index  index.html index.htm;  
            proxy_pass http://site;  
        }