Machine Replication

[Karl Denninger]

Yep.  Pretty much what I used to do with my ISP.

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On Thu, Jul 21, 2005 at 03:03:31PM -0700, Eli K. Breen wrote:
> I should point out, this is for replication in a running production 
> environment. Machines cannot be taken down, and swapping hardware is not 
> an option.
> 
> I'm currently experimenting with a copy of the MBR, and the root 
> partition on a CD, with enough tools to attach to the network to 
> retrieve images of the rest of the partitions (which can be taken as 
> current snapshots from various servers).
> 
> This _should_ result in the following scenario:
> 
> Boot new machine with CD
> partition drive(s)
> dump MBR
> dump root
> ssh foo at server 'dump -C 64 -0af - /sliceX'| (cd /usr; restore -rf -)
> [repeat above for all drives, could be automated]
> 
> Seem reasonable?
> 
> -E-
> 
> 
> Elliot Finley wrote:
> >----- Original Message ----- 
> >From: "Francois Tigeot" <ftigeot at wolfpond.org>
> >
> >>On Thu, Jul 21, 2005 at 12:20:34PM -0700, Eli K. Breen wrote:
> >>
> >>>Does anyone have a good handle on how to replicate (read: image) a
> >>>freebsd machine from one machine to an ostensibly similar machine?
> >>
> >>[...]
> >>
> >>
> >>>Now whether my details are a bit off, that's fine, I don't want this to
> >>>be diluted in to discussion of minute frivolous details (as these 
> >>>things
> >>>are wont to do), but what I _am_ looking for is a tried, tested and 
> >>>true
> >>>method of FreeBSD machine replication, specifically for the 5.3+
> >
> >releases.
> >
> >>I have found the following paper to be incredibly usefull :
> >>
> >>http://www.pix.net/software/pxeboot/archive/SANE.pdf
> >>
> >>I used some of the ideas in it to clone machines in the 5.1-5.2 era.
> >
> >
> >You could also just mirror the drive with a Promise RAID 1 card.  I've 
> >done
> >that a couple of times and it works really well.
> >
> >Elliot
> >
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