Ocfs2 users - Jan 2013 - unable to unmount drdb+ocfs2 with bind-mount active

Hi all,

i?m not sure if my problem is realted to ocfs2 or to drbd, so i x-post
this post to both lists.

I?ve drbd-volume [v 8.3.9] (dual-primary) with ocfs2 [v 1.6.3] as a
filesystem.

If I add a "bind-mount" like

/var/log/ispconfig/httpd/blog.schaal-24.de
/srv/www/clients/client2/web323/log none bind,nobootwait 0 0

to /etc/fstab i`m unable to run umount /srv/www (which is drbd-volume
with ocfs2).

umount: /srv/www: device is busy.
        (In some cases useful info about processes that use
         the device is found by lsof(8) or fuser(1))

Neither "lsof|grep www" nor "fuser -km /srv/www" show
anything.

I must first unmount the log-dir by hand before "umount /srv/www"
could
be executed.



Any suggestions how to fix this?

regards
Florian

Hi Florian,

[It was me who sent this message earlier, but it got an incorrect From: 
address due to an email configuration error on my side]

That's neither a drbd nor an ocfs2 issue, it is normal filesystem 
behavior.  As long as you have something mounted in a subdir below 
/srv/www/ you can't umount /srv/www/.  Instead of creating a bind mount, 
why not use a symlink?  Either way, once /srv/www is umounted, all of 
its subdirectories are gone too, and the path 
/srv/www/clients/client2/web323/log becomes inaccessible, so I'm not 
sure what you're trying to do.

Thanks,
Herbert.

On 1/18/13 2:18 AM, Florian Schaal wrote:
> Hi all,
>
> i?m not sure if my problem is realted to ocfs2 or to drbd, so i x-post
> this post to both lists.
>
> I?ve drbd-volume [v 8.3.9] (dual-primary) with ocfs2 [v 1.6.3] as a
> filesystem.
>
> If I add a "bind-mount" like
>
> /var/log/ispconfig/httpd/blog.schaal-24.de
> /srv/www/clients/client2/web323/log none bind,nobootwait 0 0
>
> to /etc/fstab i`m unable to run umount /srv/www (which is drbd-volume
> with ocfs2).
>
> umount: /srv/www: device is busy.
>          (In some cases useful info about processes that use
>           the device is found by lsof(8) or fuser(1))
>
> Neither "lsof|grep www" nor "fuser -km /srv/www" show
anything.
>
> I must first unmount the log-dir by hand before "umount /srv/www"
could
> be executed.
>
>
>
> Any suggestions how to fix this?
>
> regards
> Florian
>
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