4.2. Keepalived 的直接路由配置

Keepalived 的直接路由配置與 NAT 的配置類似。以下範例會配置 Keepalived，為一群使用 HTTP（連接埠 80）的真實伺服器提供負載平衡。要配置直接路由（Direct Routing），請變更 lb_kind 參數為 DR。其它配置選項會在〈節 4.1, “基本的 Keepalived 配置”〉中討論。 


global_defs {
   notification_email {
     admin@example.com
   }
   notification_email_from noreply_admin@example.com
   smtp_server 127.0.0.1
   smtp_connect_timeout 60
}

vrrp_instance RH_1 {
    state MASTER 
    interface eth0
    virtual_router_id 50
    priority 1
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass password123
    }
    virtual_ipaddress {
        172.31.0.1
    }
}

virtual_server 172.31.0.1 80
    delay_loop 10
    lb_algo rr
    lb_kind DR
    persistence_timeout 9600
    protocol TCP

    real_server 192.168.0.1 80 {
        weight 1
        TCP_CHECK {
          connect_timeout 10
          connect_port    80
        }
    }
    real_server 192.168.0.2 80 {
        weight 1
        TCP_CHECK {
          connect_timeout 10
          connect_port    80
        }
    }
    real_server 192.168.0.3 80 {
        weight 1
        TCP_CHECK {
          connect_timeout 10
          connect_port    80
        }
    }
}