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Did you set persistence time?
If you want to setup FTP server Cluster,
you have to set persistence time in LVS Cluster
----- Original Message -----
From: "Stefan Peter" <stefan@xxxxxxxxxxxxxx>
To: <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Thursday, July 25, 2002 3:28 PM
Subject: ftp problem
> Hi All,
>
> I'm new in LVS, and I have built up an LVS cluster including 4 RSs and 2
> distributors. Keepalive failover works suprisingly well, and the whole
> cluster serves DNS, HTTP, HTTPS, telnet, mail, POP3, IMAP and FTP.
> Every service works well except active FTP. I have read trough howtos and
> mailing lists but I have found no help to my problem. (Maybe I was too
> shallow.)
>
> FTP service is set to be persistent at 720 for both TCP ports 20 and 21.
> Suppose connect the cluster using a command-line FTP client: connection is
> established on port 21 to RS1. Then I issue an ls command, and another
> connection is built on port 20 to the same RS. Then I wait for FTP
> timeout, and I issue ls command again:
>
> ftp> ls
> 421 No Transfer Timeout (300 seconds): closing control connection.
> ftp> ls
> Not connected.
>
> Then I try to reconnect and when I issue ls, there is no prompt response,
> but:
>
> ftp> ls
> 200 PORT command successful.
> 425 Can't build data connection: Connection timed out
>
> On the distributor it can be seen that connections point to different RSs
> for ports 20 and 21.
>
> [root]# ipvsadm -Lc
> IPVS connection entries
> pro expire state source virtual destination
> TCP 14:55.19 ESTABLISHED client:4407 vs:ftp rs1:ftp
> TCP 01:42.27 FIN_WAIT client:4376 vs:ftp rs1:ftp
> TCP 11:55.19 NONE client:0 vs:ftp-data rs2:ftp-data
> TCP 01:51.27 NONE client:0 vs:0 rs1:0
> TCP 00:58.18 SYN_RECV client:49290 vs:ftp-data rs2:ftp-data
>
> What's wrong?
>
> Best Regards,
> Peter Stefan
>
>
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