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

[Ola Lundqvist]

tags 476535 + wontfix
thanks

Hi Christian

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. :)

Best regards,

// Ola

On Thu, Apr 24, 2008 at 10:23:33AM +0200, Christian Hofstaedtler wrote:
> Hi!
> 
> > > >  Do we need a poststop as well?
> > > 
> > > You're right, I happen to be lazy and usually let the system to umount
> > > all; but with high probability we should umount every manually mounted
> > > cruft before stop tries to unmount the whole VE, so a prestop should
> > > exist the same way prestart was implemented.
>  
> > > And by all means feel free to post it upstream, you may be more
> > > familiar with the process than I am now.
> 
> We are doing similar things with the /etc/vz/conf/$VEID.mount and
> /etc/vz/conf/$VEID.umount scripts; they are automatically handled by
> vzctl, but I'm not sure this is documented (except somewhere buried 
> in old VZ pdfs).
> 
> mount and umount obviously run at vzctl mount/umount time, which is
> pretty much pre-start and post-stop, and also does the "right thing"
> if manually starting/stopping a VE.
> These scripts can also prevent a VE from starting/stopping, if they
> return a non-zero value.
> 
> Maybe you want to look at these first?
> 
> Examples:
> cat /etc/vz/conf/201004.mount
> #!/bin/sh
> mount -onoatime /dev/raid10/ve201004-pg /var/lib/vz/root/201004/srv/db/pg
> 
> cat /etc/vz/conf/201004.umount
> #!/bin/sh
> umount /dev/raid10/ve201004-pg
> exit 0 # ignore error from umount
> 
> 
> BTW, mounting filesystems into VEID/root probably breaks vzmigrate, 
> so one needs to be careful :-)
> 
> -Christian
> 
> 
> 
> 

-- 
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