實驗-CentOS 使用Keepalived搭建高可用集群

配置keepalivedHa集群

一)實驗環境:

服務器系統:CentOS7.3

服務:nginx,keepalived

客戶端系統:Windows 10,CentOS7.3

二)初始化操作:Master/Backup，童顏的操作

#安裝keepalived軟件

[root@shiyan7 ~ ]# yum install keepalived

#安裝Nginx（需要配置EPEL源）

[root@shiyan7 ~ ]# yum install Nginx

#關閉清空防火墻

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

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

[root@shiyan7 ~ ]# iptables -F

#添加主機解析

[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

#關閉Selinux（配置后需要重啟）

[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

使用瀏覽器測試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

使用瀏覽器測試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)測試:

1)開啟主被服務器的keepalived服務,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

測試測試Master環境上的Nginx 

2)關閉Master測試Backup

Master

[root@shiyan7 ~ ]# systemctl stop keepalived

[root@shiyan7 ~ ]# ip a l

Backup

[root@shiyan7 ~ ]# ip a l

測試Backup環境上的Nginx

3)開啟Master

Master

[root@shiyan7 ~ ]# systemctl start keepalived

root@shiyan7 ~ ]# ip a l

Backup

[root@shiyan7 ~ ]# ip a l

測試測試Master環境上的Nginx