[Linux-HA] SOLVED --- RE: FTP resource cannot start because of 'idle' client

[Andrew Beekhof]

On 1/26/07, Fajar Priyanto <fajarpri at cbn.net.id> wrote:
> On Wednesday 24 January 2007 22:07, Lawrence Yann wrote:
> > Hello Fajar,
> >
> > Weird one that huh...
> >
> > I presume you are migrating an IP address across during fail-over. How
> > can the client 'connect' and therefore tie up the port if there is no
> > ftp service active to accept the request. Are you sure that thee isn't
> > another ftp server active at the time?
> >
> > Another suggestion may be to but a firewall rule to block ports 20 and
> > 21. As part of your ftp resource script, you could put an iptables
> > command in to open up those ports after the ftp server is up.
> >
> > I'm sure that there is probably a HA way to sort this out, but as a
> > novice, that's what I'd be looking into.
>
> Hi Lawrence and all,
> I will be going to the client in a short moment, and when doing the final
> testing in the office I encounter this problem again. Looks like the ftp
> client (mine is gFTP, and possibly others too) "maintain" the session to port
> tcp 21 in the Virtual IP, that makes pure-ftpd fails to bind to the port.
> Like I mention before, this can be proof by: service pure-ftpd status and
> there is already a client connected. In /var/log/messages there is no entry
> about pure-ftpd successfully stated as it should. But using ps aux, we can
> see that the pure-ftpd is actually started (the connecting client's session
> is visible too)
>
> The workaround:
> Well...., I told myself, what if we modify /etc/init.d/pure-ftpd script so
> that when it was told to 'start', it will stop first then start. And it
> works! :) By stopping it first, it clears all ftp session, therefore it then
> can start smoothly.
>
> This is the modification (only 1 line):
>
> case "$1" in
>         start)
>                 stop  <----- add this :)
>                 start

while technically legal (in that starting something thats already
started will still succeed), this is unlikely to be a good idea.

>                 ;;
>         stop)
>                 stop
>                 ;;
>         restart)
>                 stop
>                 start
>                 ;;
>         reload)
>         echo -n $"Reloading $prog: "
>
> Hopefully this experience will be of benefit for all later.
> Linux HA is the best.
> --
> Fajar Priyanto | Reg'd Linux User #327841 | Linux tutorial
> http://linux2.arinet.org
> 8:37am up 0:50, 2.6.16.13-4-default GNU/Linux
> Let's use OpenOffice. http://www.openoffice.org
>
>
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>
>
>