Bug#476535: [Debian] Re: Bug#476535: vzctl: Possibility to mount/bind into VE fs

[Christian Hofstaedtler]

Hello everyone,

* Peter Gervai <grin at grin.hu> [080425 02:18]:
> On Thu, Apr 24, 2008 at 1:01 PM, Ola Lundqvist <opal at debian.org> wrote:
> 
> >  Thanks for the clarification. I have marked this bugreport as wontfix
> >  because of the vzmigrate issue, and because that this already exists
> >  even though it is not document.
> >
> >  However maybe it should be documented, but that is a separate issue. :)
> 
> First, this must be documented, in 'man vzctl' (probably at files
> section, but I'd mention it in start/stop/mount/umount sections as
> well), and there ought to be example files provided (the ones
> Christian quoted are just fine; except exit values should be mentioned
> / demonstrated, like checking existence of the mounted-into directory
> and fail accordingly).

PDF Docs: http://openvz.org/documentation/guides/
OpenVZ User's Guide Page 88 to 90

But this is from 2005, and the paths are obviously RH/SuSE-style.
I'm also not sure where the "global" mount/umount scripts should go
on Debian.

> Third, vzmigrate manpage should mention this problem about in-mounted
> subtrees, and maybe check it even before progressing, but I cannot
> tell out of my brain whether there is a portable check for that.

Possibly upstream (Kir?) knows something about vzmigrate and mounted
subtrees?
I /think/ vzctl has code to enumerate mount points in a containter, 
but this is probably not exposed to vzmigrate...

> Still, I believe more people would mount large storage into VE than
> use vzmigrate. ;-)
vzmigrate is an important tool in multi-HN environments (think 
ISPs...).


- Christian