实验-CentOS使用Keepalived搭建高可用集群

配置keepalivedHa集群

准格尔网站建设公司创新互联建站,准格尔网站设计制作，有大型网站制作公司丰富经验。已为准格尔1000+提供企业网站建设服务。企业网站搭建\外贸网站制作要多少钱，请找那个售后服务好的准格尔做网站的公司定做！

一)实验环境:

服务器系统:CentOS7.3

服务:nginx,keepalived

客户端系统:Windows 10,CentOS7.3

二)初始化操作:Master/Backup，童颜的操作

#安装keepalived软件

[root@shiyan7 ~ ]# yum install keepalived

#安装Nginx（需要配置EPEL源）

[root@shiyan7 ~ ]# yum install Nginx

#关闭清空防火墙

[root@shiyan7 ~ ]# systemctl disable firewall.d

[root@shiyan7 ~ ]# systemctl stop firewall.d

[root@shiyan7 ~ ]# iptables -F

#添加主机解析

[root@shiyan7 ~ ]# vim /etc/hosts

127.0.0.1  localhost localhost.localdomain localhost4 localhost4.localdomain4

::1        localhost localhost.localdomain localhost6 localhost6.localdomain6

172.18.17.34 shiyan.fore

172.18.17.31 shiyan.one

#关闭Selinux（配置后需要重启）

[root@shiyan7 ~ ]# vim /etc/selinux/config

Selinux=disabled

三)Master配置

Nginx配置

[root@shiyan7 ~ ]# mkdir /app/nginx/html

[root@shiyan7 ~ ]# echo "Sorry Server-1" >/app/nginx/html/index.html

[root@shiyan7 ~ ]# cp /etc/nginx/nginx.conf{,.bak}

[root@shiyan7 ~ ]# vim /etc/nginx/nginx.conf

    server {

        listen       80 default_server;

        listen       [::]:80 default_server;

       server_name  _;

        root         /app/nginx/html;

        # Loadconfiguration files for the default server block.

        include/etc/nginx/default.d/*.conf;

        location /{

        }

        error_page404 /404.html;

           location = /40x.html {

        }

        error_page500 502 503 504 /50x.html;

            location = /50x.html {

        }

    }

[root@shiyan7 ~ ]# systemctl start nginx

使用浏览器测试Nginx

KeepAlived配置

[root@shiyan7 ~ ]# cp /etc/keepalived/keepalived.conf{,.bak}

[root@shiyan7 ~ ]# vim /etc/keepalived/keepalived.conf

global_defs {

  notification_email {

    acassen@firewall.loc

    failover@firewall.loc

    sysadmin@firewall.loc

   }

  notification_email_from Alexandre.Cassen@firewall.loc

   smtp_server192.168.200.1

  smtp_connect_timeout 30

   router_id node1

}

vrrp_instance Ha_1 {

   state BACKUP

   interface ens33

   virtual_router_id 51

   priority 100

   advert_int 1

   authentication {

       auth_type PASS

       auth_pass 1111

    }

   virtual_ipaddress {

       172.18.17.30/16 dev ens33

    }

}

四)Backup配置

Nginx配置

[root@shiyan7 ~ ]# mkdir /app/nginx/html

[root@shiyan7 ~ ]# echo "Sorry Server-2" >/app/nginx/html/index.html

[root@shiyan7 ~ ]# cp /etc/nginx/nginx.conf{,.bak}

[root@shiyan7 ~ ]# vim /etc/nginx/nginx.conf

    server {

        listen       80 default_server;

        listen       [::]:80 default_server;

       server_name  _;

        root         /app/nginx/html;

        # Loadconfiguration files for the default server block.

        include/etc/nginx/default.d/*.conf;

        location /{

        }

        error_page404 /404.html;

           location = /40x.html {

        }

        error_page500 502 503 504 /50x.html;

           location = /50x.html {

        }

    }

[root@shiyan7 ~ ]# systemctl start nginx

使用浏览器测试Nginx

KeepAlived配置

[root@shiyan7 ~ ]# cp /etc/keepalived/keepalived.conf{,.bak}

[root@shiyan7 ~ ]# vim /etc/keepalived/keepalived.conf

global_defs {

   notification_email{

    acassen@firewall.loc

    failover@firewall.loc

    sysadmin@firewall.loc

   }

  notification_email_from Alexandre.Cassen@firewall.loc

   smtp_server192.168.200.1

  smtp_connect_timeout 30

   router_id node2

}

vrrp_instance Ha_1 {

   state BACKUP

   interface ens33

   virtual_router_id 51

   priority 99

   advert_int 1

   authentication {

       auth_type PASS

       auth_pass 1111

    }

   virtual_ipaddress {

       172.18.17.30/16 dev ens33

    }

}

五)测试:

1)开启主被服务器的keepalived服务,并查看VIP/IP

Master

[root@shiyan7 ~ ]# systemctl start keepalived

[root@shiyan7 ~ ]# ip a l

Backup

[root@shiyan7 ~ ]# systemctl start keepalived

[root@shiyan7 ~ ]# ip a l

测试测试Master环境上的Nginx 

2)关闭Master测试Backup

Master

[root@shiyan7 ~ ]# systemctl stop keepalived

[root@shiyan7 ~ ]# ip a l

Backup

[root@shiyan7 ~ ]# ip a l

测试Backup环境上的Nginx

3)开启Master

Master

[root@shiyan7 ~ ]# systemctl start keepalived

root@shiyan7 ~ ]# ip a l

Backup

[root@shiyan7 ~ ]# ip a l

测试测试Master环境上的Nginx