Re: [Vserver] Back at copying / migrating vserver.

From: Herbert Poetzl <>
Date: Fri 16 Dec 2005 - 18:11:34 GMT
Message-ID: <>

On Thu, Dec 15, 2005 at 06:18:56PM +0100, Lars Hallberg wrote:
> Herbert Poetzl wrote:
> >On Thu, Dec 15, 2005 at 05:57:43PM +0100, Lars Hallberg wrote:
> >
> >
> >>After some interuption I'm back att writing a script to copy /
> >>migrate VServers.
> >>
> >>1) One consern. If a VServer is unified, and I copy over it with
> >>rsynk in the host context. Will links be properly broken or do I
> >>risk to mess upp other servers?
> >>
> >>
> >
> >should work as long as you do not copy across guests
> >(in which case it might be necessary to tell rsync
> >to ignore hard links)
> >
> >
> Not sure I follow... if /vserver/foo/bar/foo.txt is a hardlink
> (unifide), an I do copy new contents to it in the host context...
> will the link be broken or the common (unifide) file altered?

the CoW link breaking will make a copy and replace the original

> >>2) Diskspace limits is good, so suport for Xid tagging vould be
> >>good. But I don't realy vant to copy the Xid tagging. I want to use
> >>the targets Xid, whatever it is (or no taging if the target dont use
> >>it). My plan A is:
> >>
> >>Start a rsynk server on the target host, runing in the target
> >>VServers Xid context - so any files written will be with the 'right'
> >>tagging. Whithout starting the actual VServer. Is this possable?
> >>
> >yes, sounds reasonable .. as all newer guests are
> >supposed to use static xids, it should be simple to
> >do something with chcontext on the receiving end
> >(which will automatically tag the files properly)
> >
> Great! What I understand, xid tagging don't work without static xid?

well, it works with dynamic xids too, but gives 'funny' and
often unexpected results :)

> So it is no issu?

probably not ...

> >another alternative would be to copy over the files,
> >then re-unify on the destination and tag the non
> >unified files properly with chxid ...
> >
> Yes, but for migrating, I want to minimize the processing between the
> stop on the source and the start on the target. So if the rsynk itself
> fix the xid tagging automagicly it be great!

definitely, I agree that backups including _all_ properties
would be something to aim for ...


> Thanks /LaH
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Received on Fri Dec 16 18:11:51 2005

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