[CentOS] How to copy a system?
Dag Wieers
dag at wieers.com
Thu May 5 21:22:24 UTC 2011
On Thu, 5 May 2011, Les Mikesell wrote:
> On 5/5/2011 3:37 PM, Dag Wieers wrote:
>
>> I can recommend ReaR (Relax and Recover) for migrations and cloning
>> systems. I have been working wit the Relax and Recover project for the
>> past few months together with a colleague and it now covers a lot of
>> situations:
>>
>> - HWRAID (SmartArray), SWRAID, DRBD, partitions, encrypted
>> partitions, LVM
>>
>> - It supports bootable tapes (OBDR), ISO images and USB media
>>
>> - It supports backup software for restoring (like Bacula, TSM, rsync and
>> others)
>>
>> - And it can also take care of backups (using rsync, tar) using different
>> solutions (NFS, USB, Samba, ...)
>>
>> - It's modular, so with little effort you can implement your own workflow
>> or use-case
>
> What I've really always wanted in this respect is something that would
> work with backuppc such that you could run something on the source to
> generate descriptions of the partitions and filesystems (sort of
> clonezilla-like) in files that would be included in backups, and have a
> bootable restore OS that would know how to get this info from the
> backuppc server (could be an http request), build the matching
> filesystems, then run the ssh command to generate a tar image and
> extract into the right place. Backuppc already does a great job of
> managing file-level backups but it is somewhat cumbersome to re-install
> by hand on bare metal and it doesn't automatically keep a description of
> the layout.
Well, I've become very fond of rbme as of lately, but since ReaR supports
rsync out of the box, you don't need a separate backup method for it.
But if backuppc has a client, or a configuration, it's very easy to make
ReaR aware of it. And then to only configuration you would need to do is:
BACKUP=BACKUPPC
and it would automatically create a bootable image with your system's
layout and the backuppc software/configuration, and even the necessary
commands to automatically recover your system when doing:
rear recover
on the rescue prompt. That's how it is done with Bacula, TSM, and others.
>> However I would stress to test a complete disaster recover scenario for
>> your systems (different technologies) in order to understand if everything
>> is supported. You don't want to realize a problem in disaster-mode :)
>
> I already trust backuppc on the 'save a copy' side. I'd rather not
> replace that part.
Does backuppc take care of restoring HWRAID, SWRAID, DRBD, LVM, paritions,
filesystems ? If so, then ReaR may not be for you, because ReaR takes care
of those items.
>> If you need more help, feel free to join the ReaR mailinglist on
>> sourceforge and ask your questions :)
>
> Would a backuppc adapter be feasible?
Definitely, join the list and we can help you implement it.
--
-- dag wieers, dag at wieers.com, http://dag.wieers.com/
-- dagit linux solutions, info at dagit.net, http://dagit.net/
[Any errors in spelling, tact or fact are transmission errors]
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