实验

舒畅

　　

配置keepalivedHa集群

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