Keepalived 不重新添加真实服务器

Question

我正在尝试在 Keepalived 中设置一个简单的虚拟服务器，当服务器从池中移除时，它们不会自动重新添加。在 Keepalived 服务器系统日志中，我看到：

Oct 01 11:37:39 lb2 kernel:  IPVS: WRR: no destination available: no destinations present
Oct 01 11:37:40 lb2 kernel:  IPVS: WRR: no destination available: no destinations present
Oct 01 11:37:40 lb2 kernel:  IPVS: WRR: no destination available: no destinations present
Oct 01 11:37:41 lb2 kernel:  IPVS: WRR: no destination available: no destinations present
Oct 01 11:37:44 lb2 kernel:  IPVS: WRR: no destination available: no destinations present
Oct 01 11:37:47 lb2 kernel:  IPVS: WRR: no destination available: no destinations present
Oct 01 11:37:48 lb2 kernel:  IPVS: WRR: no destination available: no destinations present
Oct 01 11:37:48 lb2 kernel:  IPVS: WRR: no destination available: no destinations present
Oct 01 11:37:49 lb2 kernel:  IPVS: WRR: no destination available: no destinations present
Oct 01 11:37:49 lb2 kernel:  IPVS: WRR: no destination available: no destinations present
Oct 01 11:37:50 lb2 kernel:  IPVS: WRR: no destination available: no destinations present
Oct 01 11:37:50 lb2 kernel:  IPVS: WRR: no destination available: no destinations present
Oct 01 11:37:51 lb2 kernel:  IPVS: WRR: no destination available: no destinations present
Oct 01 11:37:51 lb2 kernel:  IPVS: WRR: no destination available: no destinations present

ipvsadm 输出：

[ashinn@lb2 ~]$ sudo ipvsadm

IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
FWM  700000 wrr persistent 300

以下是 keepalived.conf 中的相关部分：

virtual_server fwmark 700000 {
    delay_loop 20
    lb_algo wrr
    lb_kind NAT
    persistence_timeout 300
    protocol TCP

    real_server 10.10.35.11 443 {
        weight 24
        SSL_GET {
            url {
                path /check.php
            }
        }
    }

    real_server 10.10.35.12 443 {
        weight 24
        SSL_GET {
            url {
                path /check.php
            }
        }
    }
}

Keepalived服务器确实可以访问真实服务器：

[ashinn@lb2 ~]$ curl -k https://10.10.35.11/check.php
FAIL<br/>
/usr/bin/mencoder is not executable.<br/>
dio extension is not loaded.<br/>

知道为什么服务器被删除后没有重新添加吗？