Re: [Vserver] DRBD and vservers

From: Martin Fick <>
Date: Thu 13 Jul 2006 - 08:11:23 BST
Message-ID: <>

--- Daniel Hokka Zakrisson <> wrote:

> Martin Fick wrote:
> > I am using drbd with vservers and I am running
> > into a problem trying to make drbd devices go
> > secondary, they report a device busy problem.
> > I have several vservers and each one has its own
> > drbd device so that they can be migrated
> > independently from one host to another. The
> > problem is that when a vserver is stopped and
> > another vserver which was started after the first
> > vserver is still running, the drbd device for the
> > first device remains busy despite the fact that
> > it is not mounted in any namespace anymore. It's
> > as if vservers keep a reference to any
> > filesystems mounted before they were started even
> > if they are not visible within the vserver? Is
> > there anyway to fix this?
> Yes, you can enable namespace cleanup. I'm not sure
> which version of the
> patch is in the current Debian package, it might
> need an update, but if
> you have a working version, you should be able to
> touch
> /etc/vservers/.defaults/namespace-cleanup and any
> guests you start after
> that will not copy all the mounts.

OK, this seems to work, the drbd devices are no longer

The strange part is that it alaso removes all but the
last mount from the current df and mount listings in
the host namespace. This has another nasty side
effect: when using the FileSystem ocf script with
heartbeat, it can no longer unmount any of the hidden
filesystems so I am back to the same point, unable to
failover gracefully.

I guess I could modify the FileSystem script to use
/proc/mounts instead of the mount command, but it
still seems wrong to not be able to see my filesystems
when I use df. Is there a better workaround / fix to
this namespace cleanup behavior?

> > I am using debian unstable with the debian kernel
> > 2.6.16-1-vserver-686, the debian vserver tools
> 0.2.6,
> > the debian util-vserver
> I assume you mean 0.30.210-10?

Yes, sorry aptitude cut off the last 0.



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