keepalived雙主即在配置檔案中加入第二個虛擬IP
物理機A:192.168.202.101
物理機B:192.168.202.102
VIP1：192.168.202.29（MASTER物理機A）
VIP2：192.168.202.30（MASTER物理機B）
物理機A：

! Configuration File for keepalived

global_defs { 
   notification_email {
    [email protected]
   }
   notification_email_from [email protected]
   smtp_server 127.0
 
.0.1
   smtp_connect_timeout 30
   router_id LVS_3
}

vrrp_instance VI_1 {
    state MASTER            
    interface eno16777736
    virtual_router_id 51
    priority 150              
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
      192.168.202.29/24 
    }
 

}

virtual_server 192.168.202.29 80 {
    delay_loop 6            
    lb_algo wrr                
    lb_kind DR                
    nat_mask 255.255.255.0
    persistence_timeout 50     
    protocol TCP                

    real_server 192.168.202.103 80 {
        weight 1              
        TCP_CHECK {
        connect_timeout 8       
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
 

    }

    real_server 192.168.202.104 80 {
        weight 1              
        TCP_CHECK {
        connect_timeout 8       
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }
}
vrrp_instance VI_2 {        #只是在這裡額外添加了一個模組
    state BACKUP            
    interface eno16777736
    virtual_router_id 52
    priority 100              
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
      192.168.202.30/24 
    }
}

virtual_server 192.168.202.30 80 {
    delay_loop 6            
    lb_algo rr                
    lb_kind DR                
    nat_mask 255.255.255.0
    persistence_timeout 50     
    protocol TCP                

    real_server 192.168.202.103 80 {
        weight 1              
        TCP_CHECK {
        connect_timeout 8       
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }

    real_server 192.168.202.104 80 {
        weight 1              
        TCP_CHECK {
        connect_timeout 8       
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }
}

物理機B：

! Configuration File for keepalived

global_defs {
   notification_email {
    [email protected]
   }
   notification_email_from [email protected]
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_3
}

vrrp_instance VI_1 {
    state BACKUP        
    interface eno16777736
    virtual_router_id 51
    priority 150              
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
      192.168.202.29/24 
    }
}

virtual_server 192.168.202.29 80 {
    delay_loop 6            
    lb_algo wrr                
    lb_kind DR                
    nat_mask 255.255.255.0
    persistence_timeout 50     
    protocol TCP                

    real_server 192.168.202.103 80 {
        weight 1              
        TCP_CHECK {
        connect_timeout 8       
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }

    real_server 192.168.202.104 80 {
        weight 1              
        TCP_CHECK {
        connect_timeout 8       
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }
}
vrrp_instance VI_2 {
    state MASTER            
    interface eno16777736
    virtual_router_id 52
    priority 150              
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
      192.168.202.30/24 
    }
}

virtual_server 192.168.202.30 80 {
    delay_loop 6            
    lb_algo rr                
    lb_kind DR                
    nat_mask 255.255.255.0
    persistence_timeout 50     
    protocol TCP                

    real_server 192.168.202.103 80 {
        weight 1              
        TCP_CHECK {
        connect_timeout 8       
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }

    real_server 192.168.202.104 80 {
        weight 1              
        TCP_CHECK {
        connect_timeout 8       
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }
}