构建一个高可用的Nginx集群

实验目的：

构建一个高可用的Nginx集群。

实验要求：

1、基于nat结构实现；

2、实现高可用；

实验拓扑图形：

实验步骤：

1、  按图配置各个网卡地址；

2、  设置Nginx主机（下面带#的部分为从所需要的配置，其他则一样）

Yum install httpd nginx

Vim /etc/httpd/conf/httpd.conf

Listen 80 àListen
8080

Vim /etc/nginx/nginx.conf

http{

       
upstream websrvs {

       
server 172.18.24.3:80;

       
server 172.18.24.5:80;

       
server 127.0.0.1:8080 backup;

    }

}

vim /etc/nginx/conf.d/default.conf

   
location / {

       
proxy_pass http://websrvs;

}

vim /etc/keepalived/keepalived.conf

global_defs {

  
notification_email {

       
root@localhost

   }

  
notification_email_from keeplived@localhost

  
smtp_server 127.0.0.1

  
smtp_connect_timeout 30

  
router_id tes1t

  
vrrp_mcast_group4 224.0.100.24

}

vrrp_script ‘ngxstatus’ {

       
script “killall -0 nginx && exit 0 || exit 1”

       
interval 1

       
weight -5

}

vrrp_instance myr1 {

   
state MASTER                
#BACKUP

   
interface eth0                
#ens38

   
virtual_router_id 67

   
priority 100                   #98

   
advert_int 1

   
authentication {

       
auth_type PASS

       
auth_pass UIpYPPDI

    }

   
track_script {

      
 ngxstatus

    }

    
virtual_ipaddress {

       
172.18.24.13/16 dev eth0       
#ens38

    }

   
notify_master “/etc/keepalived/notify.sh master”

   
notify_backup “/etc/keepalived/notify.sh backup”

   
notify_fault “/etc/keepalived/notify.sh fault”

}

Systemctl start httpd

Systemctl start nginx

Systemctl start keepalived

3、  配置RS主机

Yum install httpd

Vim /var/www/html/index.html

4、  检测：curl http://172.18.24.13

检测结果：实现高可用Nginx集群。